CA1241158A - Vacuum cleaning apparatus - Google Patents
Vacuum cleaning apparatusInfo
- Publication number
- CA1241158A CA1241158A CA000458360A CA458360A CA1241158A CA 1241158 A CA1241158 A CA 1241158A CA 000458360 A CA000458360 A CA 000458360A CA 458360 A CA458360 A CA 458360A CA 1241158 A CA1241158 A CA 1241158A
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- Canada
- Prior art keywords
- cyclone
- wall
- receiving chamber
- dirt
- air
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
ABSTRACT OF THE DISCLOSURE
A cleaning apparatus including cyclones (11, 52, 81, 107) connected to a uniquely configured receiving chamber (12, 53, 99, 112) is described. The chamber has a diameter furthest from the cone opening (32, 75, 93, 118) at least 3 times the diameter of the cone opening such that dirt is not re-entrained from the chamber. Also described is an apparatus with seal means (33, 76, 100, 117) between the receiving chamber and cyclone which provides a seal during air flow and which allows separation of the chamber and cyclone for dirt removal. Also described is a ring seal means (34, 104) around an open portion of the receiving chamber which allows removal of the chamber from an outer container (14, 51, 80) to facilitate emptying dirt.
A cleaning apparatus including cyclones (11, 52, 81, 107) connected to a uniquely configured receiving chamber (12, 53, 99, 112) is described. The chamber has a diameter furthest from the cone opening (32, 75, 93, 118) at least 3 times the diameter of the cone opening such that dirt is not re-entrained from the chamber. Also described is an apparatus with seal means (33, 76, 100, 117) between the receiving chamber and cyclone which provides a seal during air flow and which allows separation of the chamber and cyclone for dirt removal. Also described is a ring seal means (34, 104) around an open portion of the receiving chamber which allows removal of the chamber from an outer container (14, 51, 80) to facilitate emptying dirt.
Description
IMPROVEMENTS IN VACUUM CLEANING APPARATUS
Reference to Related Application This application is related to commonly owned U.S. Patent No. 4,593,429 issued June 10, 1986.
Background of the Invention (1) ~ield of the Invention This invention related to an improved vacuum cleaning apparatus which includes at least one cyclone unit for dust extraction. Preferably the present invention relates to a vacuum cleaning apparatus of the type in which a cleaner duct or pipe for contacting a dirty surface is connected to the interior of a casing in which an air-flow is set up by a motor-driven fan. The casing contains at least one cyclone unit opera~ing to extract dirt particles (dust and other extraneous or foreign matter) from the air-flow therethrough, and to deposit the extracted dirt.
Reference to Related Application This application is related to commonly owned U.S. Patent No. 4,593,429 issued June 10, 1986.
Background of the Invention (1) ~ield of the Invention This invention related to an improved vacuum cleaning apparatus which includes at least one cyclone unit for dust extraction. Preferably the present invention relates to a vacuum cleaning apparatus of the type in which a cleaner duct or pipe for contacting a dirty surface is connected to the interior of a casing in which an air-flow is set up by a motor-driven fan. The casing contains at least one cyclone unit opera~ing to extract dirt particles (dust and other extraneous or foreign matter) from the air-flow therethrough, and to deposit the extracted dirt.
(2) Prior Art A cleaning apparatus based only on cyclone units has the advantage that dust bags are not required as dirt can be discharged from the apparatus by removing and separating the cyclone from the surrounding casing. Other advantages are that the air discharged from the appliance is substantially dust free and the use of filters as main cleaning elements is avoided. Conventionally the body of a prior art cyclone unit is substantially frusto-conical with the narrower en~ lower most. This cyclone works very well, however, improvements in efficiency were needed.
U.S. Patent 4,593,429 describes an outer cyclone or casing of lower efficiency having a cylindrical form. The lower efficiency is in respect of the cyclone's capability ~L2f~
of extracting very fine dust particles. A higher efficiency inner cyclone of frusto-conical shape is provided inside the outer cyclone. In these cyclone~ dirtv air is caused to enter the cyclone tangentially at the S upper end of the cyclone body, cleaned air is exhausted from the cyclone body through an axially located exhaust port in the upper half of the body and dust and other foreign particles collect at the bottom of the cyclone body.
For dual cyclone apparatus the air flow is repeated in the same manner, In both types of cyclone, i.e. the high efficiency frusto-conical and the low efficiency fine dust cyclone, particles collected at the bottom of the cyclone may become re-entrained in the air-flow in the body, or may never settle out at the bottom of the body, remaining entrained in the air-flow through the cyclone.
In either of these circu~stances the dust particles are caused to rise up towards the exhaust port, in the axially upwardly moving air-flow within the cyclone body ~rom the ~ dust collected in the cyclones. Thus said dust is e~hausted from the cyclone contaminating the otherwise cleaned air.
_iects It is an object of the present invention to provide means whereby the separated dust is prevented from becoming entrained in the axially upwardly moving air-fl in the cyclone. Further it is an object of the present invention to provide a vacuwm cleaning apparatus which is simple and economical to construct and use and which provides ease o~ emptyin~ of the dust From the apparatws~
These and other objects will become increasingly apparent by reEerence to ~he following description and to the drawings.
In the Drawings -Figure 1 is a front cross-sectional view Qf a pre~erred canister type vacuum cleaning apparatus inc]alding ~L~J~
an outer cyclone and an inner cyclone with a rece.iving and collectin~ chamber according to the present in-~-ention.
Figure 2 is a plan cross-sectional view alon~
line 2-2 of Figure 2 showing the tangential air inlet into the inner cyclone.
Figure 3 is a front cross-sectional view of another canister type vacuum cleaning appliance showing 2 modified receiving chamber from that shown in Figure 1.
Figure 4 is a plan cross-sectional view along line ~-4 of Figure 3.
Figure 5 is a front cross-sectional view of ~he preferred upright vacuum cleaning apparatus showing the inner and outer cyclones as described in U.S. application Serial No. 452,917 with an improved receiving chamher on 1~ the inner cyclone.
Figure 6 is a front cross-sectional v~ew of the preferred single cyclone showing the receiving chamber which is preferred for industrial ai.r cleaning applications for dust removal.
General Description The present invention relates to a cleaning apparatus comprising: a circular cross-sectioned cyclone tll, 52, 81, 107) wi~h a longitudinal axis comprising ~n air inlet (16, 63, 94, 109) at an upper end thereof, an interior dirt rotational wall ~21, 62, 97, ll9) of frusto-conical shape for receiving an air flow 'rom the air inlet and maintaining its velocity to a cone opening ~32, 75, 9~ 1 118~ smaller in aiameter than the upper end of ~he c~clone, an outer wall (36~ 79r 96~ 120) and a cyclone air outlet (35, 77, 105, lll) communicating with the interior oE saia cyclone adjacent to the upper end of the cyclolle;
and a closed dlrt receiving and collecting chamber (].2, S~, 99, 112) connected to a porti.on o the outer wall of the cyclone such 'hat a portion of the cyclone and cone opening projects into the receivin~ chamber, whereill the receiving chamber has a circular cross-sectioned wall around the axls which acts as a cyclone surface for dirt removal with a ~LZ~ 8 ~, _ minimum diameter of the cros~-section furthest from the cone opening of 3 times the diameter of the cone opening wherein an air flow is generated in the apparatus which passes sequentially through the air inlet, the cyclone, the S receiving chamber and the cyclone air outlet, the air flow rotating around the interior wall of said cyclone and receiving chamber and depositing the dirt in the receiving chamber.
Preferably the receiving chamber has an inner tapered wall which increases in diameter away from the cone opening. It i.s an important feature of the presen~
invention for dust collection to avoid entrainment of dust in the clean air that these receiving chambers have a minimum diameter at least three times the diameter of the 1~ cone opening~
In particular the present invention relatGs to a ~leaning apparat~ comprising: an outer container (10, 5.5, 80) comprising a bottom (15, 73, 82) and a casing extenai~g to and meeting the bottom, a dirty air inl~t 116~ 58 t 86~
at an upper portion of the outer container spaced from the bottom for supplying dirt laden air into the container; a circula.r cross-sectioned cyclone (11, 52~ 81) with a longitudina~ axi~ ~ounted inside the conta ner, the cy _one comprising a cyclone air inlet (16, 62r 92~ at an upper ena ~5 having a fir~t diameter of the cyclone in ~ir communication wi~h tne container, an interior dirt rotational wall (21 J
62, 97) of frusto-conical shape or receiving an alr fl~
~rom the air inlet and or maintaining its velocity to a cone opening (32, 75, 98) smaller in diameter than the diam~ter of the upper end o the cyclone, an outer wall t36, 79, 96) oE Erusto conical sh~pe, and a cyc3.one air outlet ~35 t 77, 105) communicating with the interior of the cyclone adjacent the upper end o the cyclone; a dirt receiving and collecting chamber ~12, 53, 99, 112) extending from the. bottom of the container to a portion o~
; the outer wall o~ the cyclone ~uch that a portion oE the inner cyclone projects into the receiving chamber wherein .
5~
the receiving chamber has a circular cross-sectioned inner tapered wall {30, 71, 102) around the axis having a frusto-conical shape increasing in diameter away from the cone opening and cyclone with a minimum diameter furthest S from the opening of three times -the diameter of the cone opening; and means (13, 54) for generating an air flow which passes sequentially through the dirty air inlet t the container, the cyclone air inlet, the cyclone, the receiving chamber and the cyclone air outlet, the air ~1O
rotating around the frusto-conical interior wall of the cyclone ana receiving chamber depositing the dirt in the receiving chamber. The outer container is preferably a cyclone having walls which are substantially cylindrical or tapered away from a longitudinal axis to provide a relatively low efficiency separation for vacuum cleaning appliance applications.
Basically the larger diameter receivlng chamber, relative to the opening in the inner cyclone, slows the velocity of the dust particles and allows them to agglomerate by electrostatic attenuation or other means due to rota~ional movement of the air. In prior ~rt designs the dust particles were moving too fast to be completely agglon.e;ated.
According to one preferred aspect of the pr~sent invention there is provided a vacuum suction cleaning appliance including a cyclone unit and means for generat ng an air-flow from a dirty air inlet through said cyclone unit, chclracterized in tha~ a receiving chamber i9 provided at the end of the cyclone remote from the dirty air inlet, within which region the velocity o~ dust particles i~
substantially reduced thereby allowing the particles to settle out and collect in the receiving chamber and not be entrained in the clean air.
The receiving chamber is defined by structure which extends radiall~ outwardl~ from the portion of the cyclone body. The dust enters the receiving chamber, after descending within the c~clone body in a spiral pa~h ~2qL~
adjacent to the wall thereof, and is allowed to move radially outwardly from the longitudinal axis of the cyclone under the incluence of a centrifugal force in the receiving chamber.
The dust thus accumulates at the radial extremity of the receiving chamber spaced a substntial distance from the cone opening and the upwardly moving axial clean air current.
In our above mentioned U.S. Patent No. 4,593,429 a vacuum suction cleaning appliance is described which comprises two cyclone units in series operating successfully to extract dirt particles from the air-flow therethrough.
In the appliance one of the two cyclone units has a body of substantially frusto-conical shape, this shape serving to increase the velocity of the dirt particles swirl~ing~therein- ~~--~ ~`
and hence render the cyclone capable of depositing fine dust particles in a small diameter receiving chamber relative to the diameter of the cone opening. It was found that this receiving chamber allows entrainment of dust particles because its diameter is too small.
The inner cyclone is sometimes referred to as a "high efficiency" cyclone because of its ability to remove fine dust particles. The outer of the two cyclone units is deliberately constructed to be of lower efficiency relative to dust particles and is incorporated in the air-passage upstream, relative to the inlet for dirty air, of the high efficiency cyclone unit. ~he "lower efficiency" cyclone is constructed 90 as to be incapable of dealing effectively with the finest dust particles, i.e. particles of 50 microns diameter or under, and carries out a primary cleaning action of the dirty air-flow by depositing larger dirt particles .. .. . . . . . . ........ . ... .
~ - 6 - ~
- ~1.2~
but leaving the finer dust particles 50 microns and smaller in the air. The high efficiency cyclone is then left to function in its own optimum conditions with comparati~ely clean air and only dust particles of very small size.
In U.S. Patent No. 4,593,429 an appliance was described wherein the lower efficiency was obtained by omitting the frusto-conical formation and constructing the cyc].one casing in a generally cylindrical form with the normal tangentail or scroll type air inlet adjacent one upper end.
In a convenient and preferred configuration, a vacuum cleaner casing comprises a generally low efficiency outer cyclone with an inlet for dirty air within the outer cyclone, a high efficiency inner cyclone, a passage way being provided to allow air from the outer cyclone to enter an end part of the inner cyclone. Clean air can then be withdrawn centrally from the inner cyclone and exhausted if necessary through a final filter. A receiving chamber is provided at the end of the inner cyclone remote from the passage from the outer inner cyclone adjacent the cone openingO
Specific Description The canister cleaning appliance illustrated in Figures 1 and 2 comprises an outer cyclone unit 10, an inner cyclone unit 11, a dust receiving and collection chamber 12 and a motor driven fan unit 13. The apparatus will be described as oriented in Fiyure 1. The outer cyclone 10 has a substantially frusto-conical casing comprising a side wall 14 upstanding from the radlal periphery of a circular base 15. The outer cyclone tapers inwardly from the base 15 towards the longitudinal axis a~a of the outer cyclone 10. A dirty air inlet passage 16 communicates through the upper part of the side wall 14 so as to make a tangential entry and to set up a swirling cyclonic flow of air. The end part 17 of the dirty air inlet passage 16, remote from the outer cyclone 10, is joined via a flexible tube (not shown) to a cleaner head (not shown) for contacting a dirty surface.
A semi-circular cross-sectioned flange 18 extends radially outwardly from the upper end part of the side wall 14. A cover 19, circular in plan view, having a ~ 7a -~8 peripheral recess 20 dimensioned to engage the flange 18, is engaged by said recess on the flange 18 so as to close of~ the top of the low ef~iciency cyclone.
The inner cyclone 11 comprises a frusto-conical body portion 21 and a dependent in~.et scroll 22. The inle~
scroll 22 comprises a tubular sleeve 23 ~see Figures 1 and 2), which depends from the cover 19 to a hori~ontal annular web 24. The web 24 extends between the upper end part of the frusto-conical bcdy portion 21 and the lower end par~
of the sleeve 23, and is perforated by a plurality of slots 25. The scroll 22 is completed by a second dependenl:
sleeve 26, which extends bet~een the cover 19 and the up~er end part of the frusto-conical hody portion 21 ancl the web 24. The second sleeve 26 is located radially inwardly o the tubular sleeve 23 and through the majority o~ its . length, see Figure 2, upstands from the top of the ~rusto-conical body 21 where the latter joins the inner periph~ry of the web 24. A portion 27 of the second ~lee~e 26 extends, in the ~orm of a spiral, from the junction o the frusto-conical body 21 and the web 24 to the tu~ular sleeve 23 thereby completing the scroll 21 and pro~idirl~ a tangential entry to the inner cyclone in order to be capable o~ setting up a ~swirlinq cyclonic 10w of air~
The dirt collection box 12 compri~e~ a ~irst cylindrical portion 29, a frusto-conical p~rtion 30 which extends radially outwardly and downwardly ~rom the lcwer : end o the fi~F,t cylindrical portion 29, to a second ~arger diameter cylindrical portion 31. The lower end part of the inner cyclone 11 i 8 engaged in the first cylindrical .
portion 29 so that the opening 3~ at the bot~om of the cyclone body 21 lies radially inwardly o the frusto conical portion 3~ of the receiving chamber 12. R
Elexible annul.ar sealing member 33 is provided b~tween the first cyl.i.ndr.ical ~ortion 29 and the inner cyclone 11, immediatel~ above the opening 32. Interpo~ed between the lar~er diameter cylindrical. portion 31 and the ba~e 15 is a ~econd flexible annul.ar seal1ng member 34. The motor ~IL2~ 8 g_ driven fan unit 13 is located on the cover 19, above the inner cyclone ll and is arranged so as to draw air ~rom said cyclone ll through a dependent tube 35. The dependent tu~e 3S extends downwardly from the cover l9 substantially S coaxially with the high efficiency cyclone 11. The outer wall 36 of the inner cyclone 11 is preferably frusto-conical in shape although this is not necessary. As shown in Figure l, an air flow directing ring 37 is provided around the outer wall 36 of the inner cyclone ll io which direets the air flow throuqh passage 38 ko slots 25 as shown by the arraws. Dirt collects in the inner cyclone as shown at B and in khe outer cyelone lO as shown by A.
The cleaning applianee illustrated in Figures 3 and 4 is similar to that shown in Figures l and 2 and wlll l~ be described as ori.entated in Figure 3. The appliance comprises an outer cyclone unit 51, an inner cyclone 52, a receiving cham~er 53 and a motor driven fan unit 54. The outer cyelone 5~ has a substantially cylindrical casing comprising a side wall 55 upstanding from the radlal periphery of the receiving chamber 53, the upper surface of which sexves as the base to the outer cyclone unit 51.
A dirty air inlet passage 57 communicates through t.h~ upper part of th~ side wall 55 so as to ma.~e a tangential entry and to set up a swirling eyelonic flow of Z5 air. The end part 58 of the dirty air inlet passage 57 remote from the outer cyclone, is joined via a flexible tube (not shown) to a cleaner head (not shown) for contacting a dirty surface, A serni-circular cross--sectioned flanye 59 extends radiall~ outwardl.y from the upper end part o~ t~e side wall 55. ~ cover &0, circular in plant having a peripheral recess 61 dimensioned to engage th~ flanc3e 59, is engaged by said recess 61 in the flange 59 so as to ClGSe off the top of the outer cyclone 51.
The inner cyclone 52 comprises a frusto-conical inner wa].l 62 and a dependent inlet scroll 63. The inlet tangential air flow passage or scroll 63 comprises a tubular sleeve 64 (see Figures 3 and 4), which depends from the cover 60 to a horizontal annular web 65. The web 65 extends between the upper end par~ of the Erusto-conical ~oay portion 62 and the lower end part of the sleeve 64, 5 and is per~orated by a plurality of slots 66. The scroll 63 is completed by a second dependent sleeve 67, which extends between the cover 60 and the upper end part of the frusto-conical body portion 62 and the web 65. The sleeve 67 is located radially inwardly of the tubular sleeve 64 and through the majority of its length, see Figure 4 r upstands from the top of the frusto-conical body 64 where khe latter joins the lnner periphery o~ the web 65.
portion 68 of the sleeve 67 extends, in the form of a spiral, from the function of the frusto-conical body 62 and the web 65 to the tubular ~leeve 64 thereby completing the tangential air flow passage or scroll 63 and providing a tangential entry to the inner cyclone in ordex to be capa~le o setting up a cyclonic flow of air.
The receiving chamber 53 comprises an annu7ar flange 70, a frusto-conical portion 71 which extends radially outwardly and downwardly from the radially outer : periphery of the flange 70 to a cylindrical portion 72.
The -ylindrical portio.n 72 upstands from the raaial periphery of a circular base 73 which has substantially the same diameter as the casing of the outer cyclone 51. The upper end part of the cylindrical portio~ 78 of the rece;ving chamber 53 is in disengageable sealing enga.gemen~
with the lower end part of the low efficiency cyclone wall 55. ~n air deflector 74, in the form of a cyl.ind~r topped with a cone, upstands from the base 73 coa~iall.y (c-c) w.ith the inner cyclone 52~ The lower end part of the inner cyclone 52 ls engaged in the annular flange 70 50 that the opening 7S a~ the bottom of the ~yclone 52 is located immediately above the to~ oE the deflectQr 74, w.ithin the receiving chamber 53. An annular sealing membe!-76 is provided between the annular flange 70 and the inner cyclone 52.
The motor driven fan unit 54 is located on the cover 60 above the inner unit 52 and is arransed so as to draw air from the inner cyclone unit 52 through a dependent tube 77. The dependent tube 77 extends downwardly from the cover 60 substantially coaxially with the inner cyclone 52.
The cyclone unit 52 has an outer wall 79 which is frusto-conical or any desired shape.
Figure 5 shows the outer cyclone 80 and the inner cyclone 81 adapted for an upright vacuum cle~ning appliance as shown in U.S. Serial ~o. 452,917. Thus the cyclones are relatively lcng and slender as compared to those shown in Figures 1 and 3; however the air flow is the same~ The outer cyclone 80 has a bottom 82 and cylindrical inner walls 83. The outer cyclone 80 is remhvable frorll an air ~low ~irecting head 84, which has lips 84 which engage the outside wall 85 of the outer cyclone 80. The hea~ ~4 includes a dir~y air lnle~ passage 86 inlet port 87 and an air directing passage 88 defined by ~ tapered portion 89 connected to head 84 leading to outlet passage 90 ln outlet port 91. ~s shown 'oy the dotted lines a flexible tube 92 connects the outlet port 91 to an inlet port 33 to a tangential entry passage 94 defined by cylindrical portion 95 of head 84. The inner cyclone 31 h,~s a frusto-conical shape and inner and outer walls 96 and 97 leading to a cone 2~ opening 98. The outer wall 97 of the inner cyclone 81 engages a receiving chamber 99 with a tapered ring seal 100 with a series of concentric rings on the outer wall ~7O
The tapered seal 100 including concentric rings is mo~nted o~ an elongate cylindrical portion 101 o~ the ~ecei~in~
chambar 99. The receiving chamber 99 is integral wlth a Erusto-conical or outwardly tapered portion 102 rel~tive to the axis ~d-d) which is in turn integral with a short c~lindrical portion 103. An o-ring ~eal 104 provides an air seal between the receiving chamber 99 and the outer cyclone 80. In the cylindrical porti.on 94 o~ h2ad 84 an outlel: port 105 is provided for removal o clean air through passage 106.
Figure 6 sho~s a single cyclone 107 symmetrical around a~is (e-e) similar to the inner cyclone 81 o Figure 5. The outer cyclone a3 is eli~inated and the head 1 ao is modified tor a single cyclone operation. This cyclone 137 operates as a fine dust collector in tne same manner as the inner cyclone 81 of Figure 5 with an inlet passage 109 through inlet port 110 and an outlet passage 112 throu~h outlet port 111. The recei.ving chamber 112 includes a removable cover 113 over short cylindrical portion 114.
1~ Tapered portion 115 is connected to elongate cylindrical portion 116. ~he cyclone 107 is sealed to the receiving chamber 112 by tapered seal 117. The opening 118 projects into the receiving chamber 112. Frusto-conical inner wall 119 ac~s to separate the dust particles as before. An outer wall 120 has a similar shape Eor mounting on the receiving chamber 112. The apparatus of Figure 6 i.s particularly suited to fine dust collection.
Both the appliances described abo~-e and illustrated in Figures 1 to 6 function in substantially the same manner, and the function of the appliances will now be described with operation to the appliance illustrated in Figures 1 and 2 only. Reference will be made to the air flow designated by arrows and the successive progress of dirty air through the interior of the cyclones 10 and 1~.
Similar arrows are shown on Figure 3 and 4 although the progress of the air will not be des~ribed. One signiEicant air flow difference is that the longitudinal axis of the inner and outer cyclones 55 and 62 are co~ce~tric on a~is ~c-c) in Figure 3, whereas the axis are of-set ~a-a and 30 b-b) a~ shown in Figure l; however, the air flow i~
functionally similar~ In E'igure 6 there is only a sinyle cyclone 107.
Dirty air carrying dust and other particle~ is drawn into the dirty air inlet passage 16. The air stream carrying the dirt particles makes a tangential entry into the upper part o~ the outer cyclone 10 and performs a cyclonic swirling movement generally along the line of t~le arrows and thereby deposits the majority of the larger dirt particles in the lower part of the outer cyclone 10 as indicated at A. The centriugal force on the dirt particles causes them to deposit on wall 14 and fall to the bottom 15 of the outer ~yclone 10. The air stream carrying essentially the finer dust particles (50 microns or less) then rises under the influence of the general air flow developed by the fan through the slot 25 in the web 24 and into the scroll 22. The air then makes a tangential entry to the inner cyclone 11 where the cyclonic cleaning process is repeated only with higher efficiency and greater dust particle velocity thereby depositing the finer dust particles. Once the air and dirt entrained therein enters the receiving chamber 12 from the inner cyclone 11 via the opening 32, the dust is thrown outwardly rom the axis (b-b) of the Lnner cyclone and collects at B. ~dditionally the velocity o~ the swirling air is reduced by the reverse taper of the frusto-conical portion 30 of the receiving chamber 12 allowing the dust particles to agglomerate at B
and prevent them from becoming re-entrained withi.n the air Elow~ The clean air rises under the influence of the air flow to the upper part of the inner cyclone 11 and returns through the dep~ndent t~lbe 35 to the motor f2.n 13 and is e~hausted.
For discharge of dirt particles the cover 19, carrying the inner cyclone 11 and the receiving shamber 12 i.s removed and the collected dirt is then emptied from the outer cyclone 10. It will be appreciated that when the rece:iving chamber 12 is lif~ed Erom its seating in the base 15 oE the outer cyclone 10 the contents therecf ~ilL be deposited so that the outer cyclone 10 holds all the deposited particles. 'In the apparatus shown in ~.i.gures 3 and S, the tapered portion 71 and 102 facilitat:es removal o~ the dirt A Erom the apparatus.
In the apparatus sho~7n i.n Fi.gure 1, the cylindrical portion 31 diameter (dl) is 5.26 times the diameter (d2) of the opening 32. In Figure 3 the diameter S~
(dl) of the cylindrical portion 78 is 8.59 times the diameter (d2) of the opening 75. This construction allows the particles A and B to efficiently agglomerate. In Figures 5 and 6 the diameter (dl) of the cylindrical S portions 103 and 114 are 4.67 times the diameters (d2) of the openings 98 and 118 from cyclones 81 and 107, respectively. This construction provides for removal of fine dust particles. The basic air flow of the apparatus of Figures 5 and 6 is the same as that of E'igures 1 and 3 as shown by the arrows.
It is preferred that the inner and outer cyclones be constructed of plastic. T'ne cyclonic air flow may charge the dirt particles facilitating their agylomeration at A and B.
Numerous variations in cyclonic construction will occur to those skilled in the art. It is intended that they be included ~i~hin the scope of the present invention,
U.S. Patent 4,593,429 describes an outer cyclone or casing of lower efficiency having a cylindrical form. The lower efficiency is in respect of the cyclone's capability ~L2f~
of extracting very fine dust particles. A higher efficiency inner cyclone of frusto-conical shape is provided inside the outer cyclone. In these cyclone~ dirtv air is caused to enter the cyclone tangentially at the S upper end of the cyclone body, cleaned air is exhausted from the cyclone body through an axially located exhaust port in the upper half of the body and dust and other foreign particles collect at the bottom of the cyclone body.
For dual cyclone apparatus the air flow is repeated in the same manner, In both types of cyclone, i.e. the high efficiency frusto-conical and the low efficiency fine dust cyclone, particles collected at the bottom of the cyclone may become re-entrained in the air-flow in the body, or may never settle out at the bottom of the body, remaining entrained in the air-flow through the cyclone.
In either of these circu~stances the dust particles are caused to rise up towards the exhaust port, in the axially upwardly moving air-flow within the cyclone body ~rom the ~ dust collected in the cyclones. Thus said dust is e~hausted from the cyclone contaminating the otherwise cleaned air.
_iects It is an object of the present invention to provide means whereby the separated dust is prevented from becoming entrained in the axially upwardly moving air-fl in the cyclone. Further it is an object of the present invention to provide a vacuwm cleaning apparatus which is simple and economical to construct and use and which provides ease o~ emptyin~ of the dust From the apparatws~
These and other objects will become increasingly apparent by reEerence to ~he following description and to the drawings.
In the Drawings -Figure 1 is a front cross-sectional view Qf a pre~erred canister type vacuum cleaning apparatus inc]alding ~L~J~
an outer cyclone and an inner cyclone with a rece.iving and collectin~ chamber according to the present in-~-ention.
Figure 2 is a plan cross-sectional view alon~
line 2-2 of Figure 2 showing the tangential air inlet into the inner cyclone.
Figure 3 is a front cross-sectional view of another canister type vacuum cleaning appliance showing 2 modified receiving chamber from that shown in Figure 1.
Figure 4 is a plan cross-sectional view along line ~-4 of Figure 3.
Figure 5 is a front cross-sectional view of ~he preferred upright vacuum cleaning apparatus showing the inner and outer cyclones as described in U.S. application Serial No. 452,917 with an improved receiving chamher on 1~ the inner cyclone.
Figure 6 is a front cross-sectional v~ew of the preferred single cyclone showing the receiving chamber which is preferred for industrial ai.r cleaning applications for dust removal.
General Description The present invention relates to a cleaning apparatus comprising: a circular cross-sectioned cyclone tll, 52, 81, 107) wi~h a longitudinal axis comprising ~n air inlet (16, 63, 94, 109) at an upper end thereof, an interior dirt rotational wall ~21, 62, 97, ll9) of frusto-conical shape for receiving an air flow 'rom the air inlet and maintaining its velocity to a cone opening ~32, 75, 9~ 1 118~ smaller in aiameter than the upper end of ~he c~clone, an outer wall (36~ 79r 96~ 120) and a cyclone air outlet (35, 77, 105, lll) communicating with the interior oE saia cyclone adjacent to the upper end of the cyclolle;
and a closed dlrt receiving and collecting chamber (].2, S~, 99, 112) connected to a porti.on o the outer wall of the cyclone such 'hat a portion of the cyclone and cone opening projects into the receivin~ chamber, whereill the receiving chamber has a circular cross-sectioned wall around the axls which acts as a cyclone surface for dirt removal with a ~LZ~ 8 ~, _ minimum diameter of the cros~-section furthest from the cone opening of 3 times the diameter of the cone opening wherein an air flow is generated in the apparatus which passes sequentially through the air inlet, the cyclone, the S receiving chamber and the cyclone air outlet, the air flow rotating around the interior wall of said cyclone and receiving chamber and depositing the dirt in the receiving chamber.
Preferably the receiving chamber has an inner tapered wall which increases in diameter away from the cone opening. It i.s an important feature of the presen~
invention for dust collection to avoid entrainment of dust in the clean air that these receiving chambers have a minimum diameter at least three times the diameter of the 1~ cone opening~
In particular the present invention relatGs to a ~leaning apparat~ comprising: an outer container (10, 5.5, 80) comprising a bottom (15, 73, 82) and a casing extenai~g to and meeting the bottom, a dirty air inl~t 116~ 58 t 86~
at an upper portion of the outer container spaced from the bottom for supplying dirt laden air into the container; a circula.r cross-sectioned cyclone (11, 52~ 81) with a longitudina~ axi~ ~ounted inside the conta ner, the cy _one comprising a cyclone air inlet (16, 62r 92~ at an upper ena ~5 having a fir~t diameter of the cyclone in ~ir communication wi~h tne container, an interior dirt rotational wall (21 J
62, 97) of frusto-conical shape or receiving an alr fl~
~rom the air inlet and or maintaining its velocity to a cone opening (32, 75, 98) smaller in diameter than the diam~ter of the upper end o the cyclone, an outer wall t36, 79, 96) oE Erusto conical sh~pe, and a cyc3.one air outlet ~35 t 77, 105) communicating with the interior of the cyclone adjacent the upper end o the cyclone; a dirt receiving and collecting chamber ~12, 53, 99, 112) extending from the. bottom of the container to a portion o~
; the outer wall o~ the cyclone ~uch that a portion oE the inner cyclone projects into the receiving chamber wherein .
5~
the receiving chamber has a circular cross-sectioned inner tapered wall {30, 71, 102) around the axis having a frusto-conical shape increasing in diameter away from the cone opening and cyclone with a minimum diameter furthest S from the opening of three times -the diameter of the cone opening; and means (13, 54) for generating an air flow which passes sequentially through the dirty air inlet t the container, the cyclone air inlet, the cyclone, the receiving chamber and the cyclone air outlet, the air ~1O
rotating around the frusto-conical interior wall of the cyclone ana receiving chamber depositing the dirt in the receiving chamber. The outer container is preferably a cyclone having walls which are substantially cylindrical or tapered away from a longitudinal axis to provide a relatively low efficiency separation for vacuum cleaning appliance applications.
Basically the larger diameter receivlng chamber, relative to the opening in the inner cyclone, slows the velocity of the dust particles and allows them to agglomerate by electrostatic attenuation or other means due to rota~ional movement of the air. In prior ~rt designs the dust particles were moving too fast to be completely agglon.e;ated.
According to one preferred aspect of the pr~sent invention there is provided a vacuum suction cleaning appliance including a cyclone unit and means for generat ng an air-flow from a dirty air inlet through said cyclone unit, chclracterized in tha~ a receiving chamber i9 provided at the end of the cyclone remote from the dirty air inlet, within which region the velocity o~ dust particles i~
substantially reduced thereby allowing the particles to settle out and collect in the receiving chamber and not be entrained in the clean air.
The receiving chamber is defined by structure which extends radiall~ outwardl~ from the portion of the cyclone body. The dust enters the receiving chamber, after descending within the c~clone body in a spiral pa~h ~2qL~
adjacent to the wall thereof, and is allowed to move radially outwardly from the longitudinal axis of the cyclone under the incluence of a centrifugal force in the receiving chamber.
The dust thus accumulates at the radial extremity of the receiving chamber spaced a substntial distance from the cone opening and the upwardly moving axial clean air current.
In our above mentioned U.S. Patent No. 4,593,429 a vacuum suction cleaning appliance is described which comprises two cyclone units in series operating successfully to extract dirt particles from the air-flow therethrough.
In the appliance one of the two cyclone units has a body of substantially frusto-conical shape, this shape serving to increase the velocity of the dirt particles swirl~ing~therein- ~~--~ ~`
and hence render the cyclone capable of depositing fine dust particles in a small diameter receiving chamber relative to the diameter of the cone opening. It was found that this receiving chamber allows entrainment of dust particles because its diameter is too small.
The inner cyclone is sometimes referred to as a "high efficiency" cyclone because of its ability to remove fine dust particles. The outer of the two cyclone units is deliberately constructed to be of lower efficiency relative to dust particles and is incorporated in the air-passage upstream, relative to the inlet for dirty air, of the high efficiency cyclone unit. ~he "lower efficiency" cyclone is constructed 90 as to be incapable of dealing effectively with the finest dust particles, i.e. particles of 50 microns diameter or under, and carries out a primary cleaning action of the dirty air-flow by depositing larger dirt particles .. .. . . . . . . ........ . ... .
~ - 6 - ~
- ~1.2~
but leaving the finer dust particles 50 microns and smaller in the air. The high efficiency cyclone is then left to function in its own optimum conditions with comparati~ely clean air and only dust particles of very small size.
In U.S. Patent No. 4,593,429 an appliance was described wherein the lower efficiency was obtained by omitting the frusto-conical formation and constructing the cyc].one casing in a generally cylindrical form with the normal tangentail or scroll type air inlet adjacent one upper end.
In a convenient and preferred configuration, a vacuum cleaner casing comprises a generally low efficiency outer cyclone with an inlet for dirty air within the outer cyclone, a high efficiency inner cyclone, a passage way being provided to allow air from the outer cyclone to enter an end part of the inner cyclone. Clean air can then be withdrawn centrally from the inner cyclone and exhausted if necessary through a final filter. A receiving chamber is provided at the end of the inner cyclone remote from the passage from the outer inner cyclone adjacent the cone openingO
Specific Description The canister cleaning appliance illustrated in Figures 1 and 2 comprises an outer cyclone unit 10, an inner cyclone unit 11, a dust receiving and collection chamber 12 and a motor driven fan unit 13. The apparatus will be described as oriented in Fiyure 1. The outer cyclone 10 has a substantially frusto-conical casing comprising a side wall 14 upstanding from the radlal periphery of a circular base 15. The outer cyclone tapers inwardly from the base 15 towards the longitudinal axis a~a of the outer cyclone 10. A dirty air inlet passage 16 communicates through the upper part of the side wall 14 so as to make a tangential entry and to set up a swirling cyclonic flow of air. The end part 17 of the dirty air inlet passage 16, remote from the outer cyclone 10, is joined via a flexible tube (not shown) to a cleaner head (not shown) for contacting a dirty surface.
A semi-circular cross-sectioned flange 18 extends radially outwardly from the upper end part of the side wall 14. A cover 19, circular in plan view, having a ~ 7a -~8 peripheral recess 20 dimensioned to engage the flange 18, is engaged by said recess on the flange 18 so as to close of~ the top of the low ef~iciency cyclone.
The inner cyclone 11 comprises a frusto-conical body portion 21 and a dependent in~.et scroll 22. The inle~
scroll 22 comprises a tubular sleeve 23 ~see Figures 1 and 2), which depends from the cover 19 to a hori~ontal annular web 24. The web 24 extends between the upper end part of the frusto-conical bcdy portion 21 and the lower end par~
of the sleeve 23, and is perforated by a plurality of slots 25. The scroll 22 is completed by a second dependenl:
sleeve 26, which extends bet~een the cover 19 and the up~er end part of the frusto-conical hody portion 21 ancl the web 24. The second sleeve 26 is located radially inwardly o the tubular sleeve 23 and through the majority o~ its . length, see Figure 2, upstands from the top of the ~rusto-conical body 21 where the latter joins the inner periph~ry of the web 24. A portion 27 of the second ~lee~e 26 extends, in the ~orm of a spiral, from the junction o the frusto-conical body 21 and the web 24 to the tu~ular sleeve 23 thereby completing the scroll 21 and pro~idirl~ a tangential entry to the inner cyclone in order to be capable o~ setting up a ~swirlinq cyclonic 10w of air~
The dirt collection box 12 compri~e~ a ~irst cylindrical portion 29, a frusto-conical p~rtion 30 which extends radially outwardly and downwardly ~rom the lcwer : end o the fi~F,t cylindrical portion 29, to a second ~arger diameter cylindrical portion 31. The lower end part of the inner cyclone 11 i 8 engaged in the first cylindrical .
portion 29 so that the opening 3~ at the bot~om of the cyclone body 21 lies radially inwardly o the frusto conical portion 3~ of the receiving chamber 12. R
Elexible annul.ar sealing member 33 is provided b~tween the first cyl.i.ndr.ical ~ortion 29 and the inner cyclone 11, immediatel~ above the opening 32. Interpo~ed between the lar~er diameter cylindrical. portion 31 and the ba~e 15 is a ~econd flexible annul.ar seal1ng member 34. The motor ~IL2~ 8 g_ driven fan unit 13 is located on the cover 19, above the inner cyclone ll and is arranged so as to draw air ~rom said cyclone ll through a dependent tube 35. The dependent tu~e 3S extends downwardly from the cover l9 substantially S coaxially with the high efficiency cyclone 11. The outer wall 36 of the inner cyclone 11 is preferably frusto-conical in shape although this is not necessary. As shown in Figure l, an air flow directing ring 37 is provided around the outer wall 36 of the inner cyclone ll io which direets the air flow throuqh passage 38 ko slots 25 as shown by the arraws. Dirt collects in the inner cyclone as shown at B and in khe outer cyelone lO as shown by A.
The cleaning applianee illustrated in Figures 3 and 4 is similar to that shown in Figures l and 2 and wlll l~ be described as ori.entated in Figure 3. The appliance comprises an outer cyclone unit 51, an inner cyclone 52, a receiving cham~er 53 and a motor driven fan unit 54. The outer cyelone 5~ has a substantially cylindrical casing comprising a side wall 55 upstanding from the radlal periphery of the receiving chamber 53, the upper surface of which sexves as the base to the outer cyclone unit 51.
A dirty air inlet passage 57 communicates through t.h~ upper part of th~ side wall 55 so as to ma.~e a tangential entry and to set up a swirling eyelonic flow of Z5 air. The end part 58 of the dirty air inlet passage 57 remote from the outer cyclone, is joined via a flexible tube (not shown) to a cleaner head (not shown) for contacting a dirty surface, A serni-circular cross--sectioned flanye 59 extends radiall~ outwardl.y from the upper end part o~ t~e side wall 55. ~ cover &0, circular in plant having a peripheral recess 61 dimensioned to engage th~ flanc3e 59, is engaged by said recess 61 in the flange 59 so as to ClGSe off the top of the outer cyclone 51.
The inner cyclone 52 comprises a frusto-conical inner wa].l 62 and a dependent inlet scroll 63. The inlet tangential air flow passage or scroll 63 comprises a tubular sleeve 64 (see Figures 3 and 4), which depends from the cover 60 to a horizontal annular web 65. The web 65 extends between the upper end par~ of the Erusto-conical ~oay portion 62 and the lower end part of the sleeve 64, 5 and is per~orated by a plurality of slots 66. The scroll 63 is completed by a second dependent sleeve 67, which extends between the cover 60 and the upper end part of the frusto-conical body portion 62 and the web 65. The sleeve 67 is located radially inwardly of the tubular sleeve 64 and through the majority of its length, see Figure 4 r upstands from the top of the frusto-conical body 64 where khe latter joins the lnner periphery o~ the web 65.
portion 68 of the sleeve 67 extends, in the form of a spiral, from the function of the frusto-conical body 62 and the web 65 to the tubular ~leeve 64 thereby completing the tangential air flow passage or scroll 63 and providing a tangential entry to the inner cyclone in ordex to be capa~le o setting up a cyclonic flow of air.
The receiving chamber 53 comprises an annu7ar flange 70, a frusto-conical portion 71 which extends radially outwardly and downwardly from the radially outer : periphery of the flange 70 to a cylindrical portion 72.
The -ylindrical portio.n 72 upstands from the raaial periphery of a circular base 73 which has substantially the same diameter as the casing of the outer cyclone 51. The upper end part of the cylindrical portio~ 78 of the rece;ving chamber 53 is in disengageable sealing enga.gemen~
with the lower end part of the low efficiency cyclone wall 55. ~n air deflector 74, in the form of a cyl.ind~r topped with a cone, upstands from the base 73 coa~iall.y (c-c) w.ith the inner cyclone 52~ The lower end part of the inner cyclone 52 ls engaged in the annular flange 70 50 that the opening 7S a~ the bottom of the ~yclone 52 is located immediately above the to~ oE the deflectQr 74, w.ithin the receiving chamber 53. An annular sealing membe!-76 is provided between the annular flange 70 and the inner cyclone 52.
The motor driven fan unit 54 is located on the cover 60 above the inner unit 52 and is arransed so as to draw air from the inner cyclone unit 52 through a dependent tube 77. The dependent tube 77 extends downwardly from the cover 60 substantially coaxially with the inner cyclone 52.
The cyclone unit 52 has an outer wall 79 which is frusto-conical or any desired shape.
Figure 5 shows the outer cyclone 80 and the inner cyclone 81 adapted for an upright vacuum cle~ning appliance as shown in U.S. Serial ~o. 452,917. Thus the cyclones are relatively lcng and slender as compared to those shown in Figures 1 and 3; however the air flow is the same~ The outer cyclone 80 has a bottom 82 and cylindrical inner walls 83. The outer cyclone 80 is remhvable frorll an air ~low ~irecting head 84, which has lips 84 which engage the outside wall 85 of the outer cyclone 80. The hea~ ~4 includes a dir~y air lnle~ passage 86 inlet port 87 and an air directing passage 88 defined by ~ tapered portion 89 connected to head 84 leading to outlet passage 90 ln outlet port 91. ~s shown 'oy the dotted lines a flexible tube 92 connects the outlet port 91 to an inlet port 33 to a tangential entry passage 94 defined by cylindrical portion 95 of head 84. The inner cyclone 31 h,~s a frusto-conical shape and inner and outer walls 96 and 97 leading to a cone 2~ opening 98. The outer wall 97 of the inner cyclone 81 engages a receiving chamber 99 with a tapered ring seal 100 with a series of concentric rings on the outer wall ~7O
The tapered seal 100 including concentric rings is mo~nted o~ an elongate cylindrical portion 101 o~ the ~ecei~in~
chambar 99. The receiving chamber 99 is integral wlth a Erusto-conical or outwardly tapered portion 102 rel~tive to the axis ~d-d) which is in turn integral with a short c~lindrical portion 103. An o-ring ~eal 104 provides an air seal between the receiving chamber 99 and the outer cyclone 80. In the cylindrical porti.on 94 o~ h2ad 84 an outlel: port 105 is provided for removal o clean air through passage 106.
Figure 6 sho~s a single cyclone 107 symmetrical around a~is (e-e) similar to the inner cyclone 81 o Figure 5. The outer cyclone a3 is eli~inated and the head 1 ao is modified tor a single cyclone operation. This cyclone 137 operates as a fine dust collector in tne same manner as the inner cyclone 81 of Figure 5 with an inlet passage 109 through inlet port 110 and an outlet passage 112 throu~h outlet port 111. The recei.ving chamber 112 includes a removable cover 113 over short cylindrical portion 114.
1~ Tapered portion 115 is connected to elongate cylindrical portion 116. ~he cyclone 107 is sealed to the receiving chamber 112 by tapered seal 117. The opening 118 projects into the receiving chamber 112. Frusto-conical inner wall 119 ac~s to separate the dust particles as before. An outer wall 120 has a similar shape Eor mounting on the receiving chamber 112. The apparatus of Figure 6 i.s particularly suited to fine dust collection.
Both the appliances described abo~-e and illustrated in Figures 1 to 6 function in substantially the same manner, and the function of the appliances will now be described with operation to the appliance illustrated in Figures 1 and 2 only. Reference will be made to the air flow designated by arrows and the successive progress of dirty air through the interior of the cyclones 10 and 1~.
Similar arrows are shown on Figure 3 and 4 although the progress of the air will not be des~ribed. One signiEicant air flow difference is that the longitudinal axis of the inner and outer cyclones 55 and 62 are co~ce~tric on a~is ~c-c) in Figure 3, whereas the axis are of-set ~a-a and 30 b-b) a~ shown in Figure l; however, the air flow i~
functionally similar~ In E'igure 6 there is only a sinyle cyclone 107.
Dirty air carrying dust and other particle~ is drawn into the dirty air inlet passage 16. The air stream carrying the dirt particles makes a tangential entry into the upper part o~ the outer cyclone 10 and performs a cyclonic swirling movement generally along the line of t~le arrows and thereby deposits the majority of the larger dirt particles in the lower part of the outer cyclone 10 as indicated at A. The centriugal force on the dirt particles causes them to deposit on wall 14 and fall to the bottom 15 of the outer ~yclone 10. The air stream carrying essentially the finer dust particles (50 microns or less) then rises under the influence of the general air flow developed by the fan through the slot 25 in the web 24 and into the scroll 22. The air then makes a tangential entry to the inner cyclone 11 where the cyclonic cleaning process is repeated only with higher efficiency and greater dust particle velocity thereby depositing the finer dust particles. Once the air and dirt entrained therein enters the receiving chamber 12 from the inner cyclone 11 via the opening 32, the dust is thrown outwardly rom the axis (b-b) of the Lnner cyclone and collects at B. ~dditionally the velocity o~ the swirling air is reduced by the reverse taper of the frusto-conical portion 30 of the receiving chamber 12 allowing the dust particles to agglomerate at B
and prevent them from becoming re-entrained withi.n the air Elow~ The clean air rises under the influence of the air flow to the upper part of the inner cyclone 11 and returns through the dep~ndent t~lbe 35 to the motor f2.n 13 and is e~hausted.
For discharge of dirt particles the cover 19, carrying the inner cyclone 11 and the receiving shamber 12 i.s removed and the collected dirt is then emptied from the outer cyclone 10. It will be appreciated that when the rece:iving chamber 12 is lif~ed Erom its seating in the base 15 oE the outer cyclone 10 the contents therecf ~ilL be deposited so that the outer cyclone 10 holds all the deposited particles. 'In the apparatus shown in ~.i.gures 3 and S, the tapered portion 71 and 102 facilitat:es removal o~ the dirt A Erom the apparatus.
In the apparatus sho~7n i.n Fi.gure 1, the cylindrical portion 31 diameter (dl) is 5.26 times the diameter (d2) of the opening 32. In Figure 3 the diameter S~
(dl) of the cylindrical portion 78 is 8.59 times the diameter (d2) of the opening 75. This construction allows the particles A and B to efficiently agglomerate. In Figures 5 and 6 the diameter (dl) of the cylindrical S portions 103 and 114 are 4.67 times the diameters (d2) of the openings 98 and 118 from cyclones 81 and 107, respectively. This construction provides for removal of fine dust particles. The basic air flow of the apparatus of Figures 5 and 6 is the same as that of E'igures 1 and 3 as shown by the arrows.
It is preferred that the inner and outer cyclones be constructed of plastic. T'ne cyclonic air flow may charge the dirt particles facilitating their agylomeration at A and B.
Numerous variations in cyclonic construction will occur to those skilled in the art. It is intended that they be included ~i~hin the scope of the present invention,
Claims
I CLAIM:
A cleaning apparatus comprising:
(a) a circular cross-sectioned cyclone (11, 52, 81, 107) with a longitudinal axis comprising an air inlet (16, 63, 94, 109) at an upper end thereof, an interior dirt rotational wall (21, 62, 97, 119) of frusto-conical shape for receiving an air flow from the air inlet and maintaining its velocity to a cone opening (32,75,98, 118) smaller in diameter than the upper end of the cyclone, an outer wall (36, 79, 96, 120) and a cyclone air outlet.
(35, 77, 105, 111) communicating with the interior of the cyclone adjacent to the upper end of the cyclone; and (b) a closed dirt receiving and collecting chamber (12, 53, 99, 112) connected to a portion of the outer wall of the cyclone such that a portion of the cyclone and cone opening projects into the receiving chamber, wherein the receiving chamber has a circular cross-sectioned wall around the axis which acts as a cyclone surface for dirt removal with a minimum diameter of the cross section furthest from the cone opening of 3 times the diameter of the core opening, wherein an air flow is generated In the apparatus which passes sequentially through the air inlet, the cyclone, the receiving chamber and the cyclone air outlet, the air flow rotating around the interior wall of the cyclone and receiving chamber and depositing the dirt in the receiving chamber.
A cleaning apparatus comprising:
(a) a circular cross-sectioned cyclone (11, 52, 81, 107) with a longitudinal axis comprising an air inlet (16, 63, 94, 109) at an upper end thereof, an interior dirt rotational wall (21, 62, 97, 119) of frusto-conical shape for receiving an air flow from the air inlet and maintaining its velocity to a cone opening (32, 75, 98, 118) smaller in diameter than the upper end of the cyclone, an outer wall (36, 79, 96, 120) and a cyclone air outlet (35, 77, 105, 111) communicating with the interior of the cyclone adjacent to the upper end of the cyclone;
(b) a closed dirt receiving and collecting chamber (12, 53, 99, 112) connected to a portion of the outer wall of the cyclone such that a portion of the cyclone and core opening projects into the receiving chamber wherein the receiving chamber has a circular cross-sectioned inner tapered wall (30, 71, 102, 115) around the axis having a frusto-conical shape increasing in diameter away from the cone opening and cyclone with a minimum diameter furthest from the cone opening of 3 times the diameter of the cone opening; and (c) means (13, 54) for generating an air flow which passes sequentially through the air inlet, the cyclone, the receiving chamber and the cyclone air outlet, the air flow rotating around the interior wall of the cyclone and receiving chamber and depositing the dirt in the receiving chamber.
The apparatus of Claim 2 wherein the receiving chamber comprises a narrow tube (29, 101, 116) which is substantially cylindrical around the axis with one end connected to the portion of the outer wall (36, 96, 120) of the cyclone and the opposite end connected to the inner tapered wall adjacent the cone opening.
A cleaning apparatus comprising:
(a) an outer container (10, 55, 80) comprising a bottom (15, 73, 82) and a easing extending to and meeting the bottom, a dirty air inlet (16, 58, 86) at an upper portion of the outer container spaced from the bottom for supplying dirt laden air into the container;
(b) a circular cross-sectioned cyclone (11, 52, 81) with a longitudinal axis mounted inside the container, the cyclone comprising a cyclone air inlet (16, 62, 92) at an upper end having a first diameter of the cyclone in air communication with the container, an interior dirt rotational wall (21, 62, 97) of frusto-conical shape for receiving an air flow from the air inlet and for maintaining its velocity to a cone opening (32, 75, 98) smaller in diameter than the diameter of the upper end of the cyclone, an outer wall (36, 75, 96) of frusto-conical shape, and a cyclone air outlet (35, 77, 105) communicating with the interior of the cyclone adjacent the upper end of the cyclone;
(c) a dirt receiving and collecting chamber (12, 53, 99, 112) extending from the bottom of the container to a portion of the outer wall of the cyclone such that a portion of the inner cyclone projects into the receiving chamber wherein the receiving chamber has a circular cross-sectioned inner tapered wall (30, 71, 102) around the axis having a frusto-conical shape increasing in diameter away from the cone opening and cyclone with a minimum diameter furthest from the opening of 3 times the diameter of the cone opening; and (d) means (13, 54) for generating an air flow which passes sequentially through the dirty air inlet, the container, the cyclone air inlet, the cyclone, the receiving chamber and the cyclone air outlet, the air flow rotating around the frusto-conical interior wall of the cyclone and the receiving chamber depositing the dirt in the receiving chamber.
The apparatus of Claim 4 wherein the receiving chamber comprises a narrow tube (29, 101, 116) which is substantially cylindrical around the axis with one end connected to the portion of the outer wall (36, 96, 120) of the cyclone and the opposite end connected to inner tapered wall adjacent the cone opening.
A cleaning apparatus comprising:
(a) an outer cyclone (10, 55, 80) comprising a bottom (15, 73, 82) and a casing extending to and meeting the bottom, the casing having an interior wall which acts as a dirt rotation surface, a dirty air inlet (16, 58, 86 at an upper portion of the outer cyclone spaced from the bottom for supplying dirt laden air tangentially to the interior wall, and an outer cyclone air outlet communicating with the interior of the outer cyclone;
(b) a circular cross-sectioned inner cyclone with a longitudinal axis mounted inside the outer cyclone, the inner cyclone comprising an air inlet (16, 62, 94) at an upper end of the cyclone having a first diameter in air communication through a passage with the air outlet of the outer cyclone, an interior dirt rotational wall (21, 62, 97) of frusto-conical shape for receiving an air flow from the passage and maintaining its velocity to a cone opening (32, 75, 90) smaller in diameter than the diameter of the upper end of the cyclone, an outer wall (36, 79, 96) of frusto-conical shape, and an inner cyclone air outlet (35 77, 105) communicating with the interior of the inner cyclone adjacent the upper end of the cyclone as defined by the frusto-conical shaped wall;
(c) a dirt receiving and collecting chamber (12, 53, 99, 112) extending from the bottom of the outer cyclone and cone opening to a portion of the outer wall of the inner cyclone such that a portion of the inner cyclone and cyclone opening projects into the receiving chamber, wherein the receiving chamber has a circular cross-sectioned inner tapered wall around the axis having a frusto-conical shape increasing in diameter away from the cone opening of the cyclone and with a minimum diameter of the cross-section furthest from the cone opening of 3 times the diameter of the core opening; and (d) means (13, 54) for generating an air flow which passes sequentially through the dirty air inlet, the outer cyclone, the outer cyclone air outlet, the passage, the inner cyclone, the receiving chamber and the inner cyclone air outlet, the air flow rotating around the cylindrical interior wall of the outer cyclone and the frusto-conical interior wall of the inner cyclone.
The apparatus of Claim 6 wherein the receiving chamber comprises a narrow circular cross-sectional tube (29, 101, 116) which is cylindrical around the axis with one end connected to the portion of the outer wall (36, 96, 120) of the inner cyclone and the opposite end connected to the tapered wall adjacent to the cone opening.
The vacuum cleaning appliance of Claim 6 wherein the receiving chamber and the portion of the outer wall of the inner cyclone are joined together in use and separable for emptying the receiving chamber, wherein the receiving chamber is open adjacent to the bottom of the outer cyclone and wherein a flexible seal (34, 103) is provided between the bottom and the chamber to prevent air leakage between them during use.
The vacuum cleaning appliance of Claim 6 wherein a flexible tapered air seal (100) is provided between the receiving chamber and the outer wall of the inner cyclone such that the inner cyclone is separable from the receiving chamber.
The vacuum cleaning appliance of Claim 6 wherein the inner wall of the outer cyclone is substantially cylindrical.
The vacuum cleaning appliance of Claim 10 wherein the outer cyclone and the inner cyclone are concentric around common longitudinal axis, wherein the inner wall of the outer cyclone is substantially cylindrical, wherein the receiving chamber comprises a f narrow circular cross-sectional tube (29, 101, 116) which is cylindrical around the axis with one end connected to the portion of the outer wall of the cyclone and the opposite end connected to the inner tapered wall of the receiving chamber adjacent to the cone opening such that finely divided dirt is trapped in the receiving chamber and wherein the width of the inner wall of the outer cyclone is approximately the same as the minimum diameter of the tapered wall of the receiving chamber.
The vacuum cleaning apparatus of Claim 11 wherein the receiving chamber is open adjacent to the bottom of the outer cyclone, wherein a flexible ring seal (104) is provided between the outer cyclone and the chamber adjacent to the bottom to prevent air leakage during use and wherein a flexible tapered seal (100) is provided between the receiving chamber and the outer wall of the inner cyclone such that the inner cyclone is separable from the receiving chamber.
The vacuum cleaning device of Claim 12 wherein the tapered seal is composed of a series of concentric rings having a frusto-conical shape slightly smaller than the outer wall of the inner cyclone to provide the seal.
The vacuum cleaning device of Claim 6 wherein an air deflector (74) is mounted in the receiving chamber opposite the cone opening of the inner cyclone along the axis.
A cleaning apparatus comprising:
(a) an outer container (10, 55, 80) comprising a bottom (15, 73, 82) and a casing extending to and meeting the bottom, a dirty air inlet (16, 58, 86) at an upper portion of the outer container spaced from the bottom for supplying dirt laden air into the container;
(b) a circular cross-sectioned cyclone (11, 52, 81) with a longitudinal axis mounted inside the container, the cyclone comprising a cyclone air inlet (16, 62, 92) at an upper end having a first diameter of the cyclone in air communication with the container, an interior dirt rotational wall (21, 62, 97) of frusto-conical shape for receiving an air flow from the air inlet and for maintaining its velocity to a cone opening (32, 75, 98) smaller in diameter than the diameter of the upper end of the cyclone, an outer wall (36, 79, 96) of frusto-conical shape, and a cyclone air outlet (35, 77, 105) communicating with the interior of the cyclone adjacent the upper end or the cyclone;
(c) a dirt receiving and collecting chamber (12, 53, 99, 112) extending from the bottom of the container to a portion of the outer wall of the cyclone wherein the chamber is separable from the cyclone to facilitate emptying of the dirt;
(d) seal means (33, 76, 100, 117) between the chamber and cyclone and (e) means (13, 54) for generating an air flow which passes sequentially through the dirty air inlet, the container, the cyclone air inlet, the cyclone, the receiving chamber and the cyclone air outlet, the air flow rotating around the frusto-conical interior wall of the cyclone and receiving chamber depositing the dirt in the receiving chamber.
The cleaning apparatus of Claim 15 wherein the chamber is removable from the outer container and second seal means (34, 104) is provided between the container and receiving chamber.
The cleaning apparatus of claim 15 wherein the receiving chamber is open adjacent the bottom of the outer container such that dirt remains in the outer container upon removal of the receiving chamber from the outer container.
The cleaning apparatus of Claim 15 wherein a portion of the inner cyclone projects into the receiving chamber, wherein the receiving chamber has a circular cross-sectioned inner tapered wall (30, 71, 102) around the axis having a frusto-conical shape increasing in diameter away from the cone opening and cyclone.
A cleaning apparatus comprising:
(a) an outer container (10, 55, 80) comprising a bottom (15, 73, 82) and a casing extending to and meeting the bottom, a dirty air inlet (16, 58, 86) at an upper portion of the outer container spaced from the bottom for supplying dirt laden air into the container (b) a circular cross-sectioned cyclone (11, 52 81) with a longitudinal axis mounted inside the container, the cyclone comprising a cyclone air inlet (16, 62, 92) at an upper end having a first diameter of the cyclone in air communication with the container, an interior dirt rotational wall (21, 62, 97) of frusto-conical shape for receiving an air flow frm the air inlet and for maintaining its velocity to a cone opening (32, 75, 98) smaller in diameter than the diameter of the upper end of the cyclone, an outer wall (36, 79, 96) of frusto-conical shape, and a cyclone air outlet (35, 77, 105) communicating with the interior of the cyclone adjacent the upper end of the cyclone;
(c) a dirt receiving and collecting chamber (12, 53, 99, 112) extending from the bottom of the container to a portion of the outer wall of the cyclone wherein the chamber and cyclone are separable from the outer container and wherein the chamber is open to the bottom of the container to facilitate emptying of the dirt;
(d) ring seal means (34, 104) between the chamber and outer container; and (e) means (13, 54) for generating an air flow which passes sequentially through the dirty air inlet, the container, the cyclone air inlet, the cyclone, the receiving chamber and the cyclone air outlet, the air flow rotating around the frusto-conical interior wall of the cyclone and the receiving chamber depositing the dirt in the receiving chamber.
The cleaning apparatus of Claim 19 wherein a portion of the inner cyclone projects into the receiving chamber, wherein the receiving chamber has a circular cross-sectioned inner tapered wall (30, 71, 102) around the axis having a frusto-conical shape increasing in diameter away from the cone opening and cyclone.
A cleaning apparatus comprising:
(a) a circular cross-sectioned cyclone (11, 52, 81, 107) with a longitudinal axis comprising an air inlet (16, 63, 94, 109) at an upper end thereof, an interior dirt rotational wall (21, 62, 97, 119) of frusto-conical shape for receiving an air flow from the air inlet and maintaining its velocity to a cone opening (32,75,98, 118) smaller in diameter than the upper end of the cyclone, an outer wall (36, 79, 96, 120) and a cyclone air outlet.
(35, 77, 105, 111) communicating with the interior of the cyclone adjacent to the upper end of the cyclone; and (b) a closed dirt receiving and collecting chamber (12, 53, 99, 112) connected to a portion of the outer wall of the cyclone such that a portion of the cyclone and cone opening projects into the receiving chamber, wherein the receiving chamber has a circular cross-sectioned wall around the axis which acts as a cyclone surface for dirt removal with a minimum diameter of the cross section furthest from the cone opening of 3 times the diameter of the core opening, wherein an air flow is generated In the apparatus which passes sequentially through the air inlet, the cyclone, the receiving chamber and the cyclone air outlet, the air flow rotating around the interior wall of the cyclone and receiving chamber and depositing the dirt in the receiving chamber.
A cleaning apparatus comprising:
(a) a circular cross-sectioned cyclone (11, 52, 81, 107) with a longitudinal axis comprising an air inlet (16, 63, 94, 109) at an upper end thereof, an interior dirt rotational wall (21, 62, 97, 119) of frusto-conical shape for receiving an air flow from the air inlet and maintaining its velocity to a cone opening (32, 75, 98, 118) smaller in diameter than the upper end of the cyclone, an outer wall (36, 79, 96, 120) and a cyclone air outlet (35, 77, 105, 111) communicating with the interior of the cyclone adjacent to the upper end of the cyclone;
(b) a closed dirt receiving and collecting chamber (12, 53, 99, 112) connected to a portion of the outer wall of the cyclone such that a portion of the cyclone and core opening projects into the receiving chamber wherein the receiving chamber has a circular cross-sectioned inner tapered wall (30, 71, 102, 115) around the axis having a frusto-conical shape increasing in diameter away from the cone opening and cyclone with a minimum diameter furthest from the cone opening of 3 times the diameter of the cone opening; and (c) means (13, 54) for generating an air flow which passes sequentially through the air inlet, the cyclone, the receiving chamber and the cyclone air outlet, the air flow rotating around the interior wall of the cyclone and receiving chamber and depositing the dirt in the receiving chamber.
The apparatus of Claim 2 wherein the receiving chamber comprises a narrow tube (29, 101, 116) which is substantially cylindrical around the axis with one end connected to the portion of the outer wall (36, 96, 120) of the cyclone and the opposite end connected to the inner tapered wall adjacent the cone opening.
A cleaning apparatus comprising:
(a) an outer container (10, 55, 80) comprising a bottom (15, 73, 82) and a easing extending to and meeting the bottom, a dirty air inlet (16, 58, 86) at an upper portion of the outer container spaced from the bottom for supplying dirt laden air into the container;
(b) a circular cross-sectioned cyclone (11, 52, 81) with a longitudinal axis mounted inside the container, the cyclone comprising a cyclone air inlet (16, 62, 92) at an upper end having a first diameter of the cyclone in air communication with the container, an interior dirt rotational wall (21, 62, 97) of frusto-conical shape for receiving an air flow from the air inlet and for maintaining its velocity to a cone opening (32, 75, 98) smaller in diameter than the diameter of the upper end of the cyclone, an outer wall (36, 75, 96) of frusto-conical shape, and a cyclone air outlet (35, 77, 105) communicating with the interior of the cyclone adjacent the upper end of the cyclone;
(c) a dirt receiving and collecting chamber (12, 53, 99, 112) extending from the bottom of the container to a portion of the outer wall of the cyclone such that a portion of the inner cyclone projects into the receiving chamber wherein the receiving chamber has a circular cross-sectioned inner tapered wall (30, 71, 102) around the axis having a frusto-conical shape increasing in diameter away from the cone opening and cyclone with a minimum diameter furthest from the opening of 3 times the diameter of the cone opening; and (d) means (13, 54) for generating an air flow which passes sequentially through the dirty air inlet, the container, the cyclone air inlet, the cyclone, the receiving chamber and the cyclone air outlet, the air flow rotating around the frusto-conical interior wall of the cyclone and the receiving chamber depositing the dirt in the receiving chamber.
The apparatus of Claim 4 wherein the receiving chamber comprises a narrow tube (29, 101, 116) which is substantially cylindrical around the axis with one end connected to the portion of the outer wall (36, 96, 120) of the cyclone and the opposite end connected to inner tapered wall adjacent the cone opening.
A cleaning apparatus comprising:
(a) an outer cyclone (10, 55, 80) comprising a bottom (15, 73, 82) and a casing extending to and meeting the bottom, the casing having an interior wall which acts as a dirt rotation surface, a dirty air inlet (16, 58, 86 at an upper portion of the outer cyclone spaced from the bottom for supplying dirt laden air tangentially to the interior wall, and an outer cyclone air outlet communicating with the interior of the outer cyclone;
(b) a circular cross-sectioned inner cyclone with a longitudinal axis mounted inside the outer cyclone, the inner cyclone comprising an air inlet (16, 62, 94) at an upper end of the cyclone having a first diameter in air communication through a passage with the air outlet of the outer cyclone, an interior dirt rotational wall (21, 62, 97) of frusto-conical shape for receiving an air flow from the passage and maintaining its velocity to a cone opening (32, 75, 90) smaller in diameter than the diameter of the upper end of the cyclone, an outer wall (36, 79, 96) of frusto-conical shape, and an inner cyclone air outlet (35 77, 105) communicating with the interior of the inner cyclone adjacent the upper end of the cyclone as defined by the frusto-conical shaped wall;
(c) a dirt receiving and collecting chamber (12, 53, 99, 112) extending from the bottom of the outer cyclone and cone opening to a portion of the outer wall of the inner cyclone such that a portion of the inner cyclone and cyclone opening projects into the receiving chamber, wherein the receiving chamber has a circular cross-sectioned inner tapered wall around the axis having a frusto-conical shape increasing in diameter away from the cone opening of the cyclone and with a minimum diameter of the cross-section furthest from the cone opening of 3 times the diameter of the core opening; and (d) means (13, 54) for generating an air flow which passes sequentially through the dirty air inlet, the outer cyclone, the outer cyclone air outlet, the passage, the inner cyclone, the receiving chamber and the inner cyclone air outlet, the air flow rotating around the cylindrical interior wall of the outer cyclone and the frusto-conical interior wall of the inner cyclone.
The apparatus of Claim 6 wherein the receiving chamber comprises a narrow circular cross-sectional tube (29, 101, 116) which is cylindrical around the axis with one end connected to the portion of the outer wall (36, 96, 120) of the inner cyclone and the opposite end connected to the tapered wall adjacent to the cone opening.
The vacuum cleaning appliance of Claim 6 wherein the receiving chamber and the portion of the outer wall of the inner cyclone are joined together in use and separable for emptying the receiving chamber, wherein the receiving chamber is open adjacent to the bottom of the outer cyclone and wherein a flexible seal (34, 103) is provided between the bottom and the chamber to prevent air leakage between them during use.
The vacuum cleaning appliance of Claim 6 wherein a flexible tapered air seal (100) is provided between the receiving chamber and the outer wall of the inner cyclone such that the inner cyclone is separable from the receiving chamber.
The vacuum cleaning appliance of Claim 6 wherein the inner wall of the outer cyclone is substantially cylindrical.
The vacuum cleaning appliance of Claim 10 wherein the outer cyclone and the inner cyclone are concentric around common longitudinal axis, wherein the inner wall of the outer cyclone is substantially cylindrical, wherein the receiving chamber comprises a f narrow circular cross-sectional tube (29, 101, 116) which is cylindrical around the axis with one end connected to the portion of the outer wall of the cyclone and the opposite end connected to the inner tapered wall of the receiving chamber adjacent to the cone opening such that finely divided dirt is trapped in the receiving chamber and wherein the width of the inner wall of the outer cyclone is approximately the same as the minimum diameter of the tapered wall of the receiving chamber.
The vacuum cleaning apparatus of Claim 11 wherein the receiving chamber is open adjacent to the bottom of the outer cyclone, wherein a flexible ring seal (104) is provided between the outer cyclone and the chamber adjacent to the bottom to prevent air leakage during use and wherein a flexible tapered seal (100) is provided between the receiving chamber and the outer wall of the inner cyclone such that the inner cyclone is separable from the receiving chamber.
The vacuum cleaning device of Claim 12 wherein the tapered seal is composed of a series of concentric rings having a frusto-conical shape slightly smaller than the outer wall of the inner cyclone to provide the seal.
The vacuum cleaning device of Claim 6 wherein an air deflector (74) is mounted in the receiving chamber opposite the cone opening of the inner cyclone along the axis.
A cleaning apparatus comprising:
(a) an outer container (10, 55, 80) comprising a bottom (15, 73, 82) and a casing extending to and meeting the bottom, a dirty air inlet (16, 58, 86) at an upper portion of the outer container spaced from the bottom for supplying dirt laden air into the container;
(b) a circular cross-sectioned cyclone (11, 52, 81) with a longitudinal axis mounted inside the container, the cyclone comprising a cyclone air inlet (16, 62, 92) at an upper end having a first diameter of the cyclone in air communication with the container, an interior dirt rotational wall (21, 62, 97) of frusto-conical shape for receiving an air flow from the air inlet and for maintaining its velocity to a cone opening (32, 75, 98) smaller in diameter than the diameter of the upper end of the cyclone, an outer wall (36, 79, 96) of frusto-conical shape, and a cyclone air outlet (35, 77, 105) communicating with the interior of the cyclone adjacent the upper end or the cyclone;
(c) a dirt receiving and collecting chamber (12, 53, 99, 112) extending from the bottom of the container to a portion of the outer wall of the cyclone wherein the chamber is separable from the cyclone to facilitate emptying of the dirt;
(d) seal means (33, 76, 100, 117) between the chamber and cyclone and (e) means (13, 54) for generating an air flow which passes sequentially through the dirty air inlet, the container, the cyclone air inlet, the cyclone, the receiving chamber and the cyclone air outlet, the air flow rotating around the frusto-conical interior wall of the cyclone and receiving chamber depositing the dirt in the receiving chamber.
The cleaning apparatus of Claim 15 wherein the chamber is removable from the outer container and second seal means (34, 104) is provided between the container and receiving chamber.
The cleaning apparatus of claim 15 wherein the receiving chamber is open adjacent the bottom of the outer container such that dirt remains in the outer container upon removal of the receiving chamber from the outer container.
The cleaning apparatus of Claim 15 wherein a portion of the inner cyclone projects into the receiving chamber, wherein the receiving chamber has a circular cross-sectioned inner tapered wall (30, 71, 102) around the axis having a frusto-conical shape increasing in diameter away from the cone opening and cyclone.
A cleaning apparatus comprising:
(a) an outer container (10, 55, 80) comprising a bottom (15, 73, 82) and a casing extending to and meeting the bottom, a dirty air inlet (16, 58, 86) at an upper portion of the outer container spaced from the bottom for supplying dirt laden air into the container (b) a circular cross-sectioned cyclone (11, 52 81) with a longitudinal axis mounted inside the container, the cyclone comprising a cyclone air inlet (16, 62, 92) at an upper end having a first diameter of the cyclone in air communication with the container, an interior dirt rotational wall (21, 62, 97) of frusto-conical shape for receiving an air flow frm the air inlet and for maintaining its velocity to a cone opening (32, 75, 98) smaller in diameter than the diameter of the upper end of the cyclone, an outer wall (36, 79, 96) of frusto-conical shape, and a cyclone air outlet (35, 77, 105) communicating with the interior of the cyclone adjacent the upper end of the cyclone;
(c) a dirt receiving and collecting chamber (12, 53, 99, 112) extending from the bottom of the container to a portion of the outer wall of the cyclone wherein the chamber and cyclone are separable from the outer container and wherein the chamber is open to the bottom of the container to facilitate emptying of the dirt;
(d) ring seal means (34, 104) between the chamber and outer container; and (e) means (13, 54) for generating an air flow which passes sequentially through the dirty air inlet, the container, the cyclone air inlet, the cyclone, the receiving chamber and the cyclone air outlet, the air flow rotating around the frusto-conical interior wall of the cyclone and the receiving chamber depositing the dirt in the receiving chamber.
The cleaning apparatus of Claim 19 wherein a portion of the inner cyclone projects into the receiving chamber, wherein the receiving chamber has a circular cross-sectioned inner tapered wall (30, 71, 102) around the axis having a frusto-conical shape increasing in diameter away from the cone opening and cyclone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000458360A CA1241158A (en) | 1984-07-06 | 1984-07-06 | Vacuum cleaning apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000458360A CA1241158A (en) | 1984-07-06 | 1984-07-06 | Vacuum cleaning apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1241158A true CA1241158A (en) | 1988-08-30 |
Family
ID=4128258
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000458360A Expired CA1241158A (en) | 1984-07-06 | 1984-07-06 | Vacuum cleaning apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1241158A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5267371A (en) * | 1992-02-19 | 1993-12-07 | Iona Appliances Inc. | Cyclonic back-pack vacuum cleaner |
| US5558697A (en) * | 1992-12-08 | 1996-09-24 | Notetry Limited | Dual cyclonic vacuum cleaner |
| US6146434A (en) * | 1999-02-24 | 2000-11-14 | The Hoover Company | Cyclonic dirt cup assembly |
| US6183527B1 (en) | 1998-02-02 | 2001-02-06 | Black & Decker Inc. | Dust collector with work surface |
| CN102429610A (en) * | 2011-11-28 | 2012-05-02 | 大连民族学院 | Gas-dust separation device |
-
1984
- 1984-07-06 CA CA000458360A patent/CA1241158A/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5267371A (en) * | 1992-02-19 | 1993-12-07 | Iona Appliances Inc. | Cyclonic back-pack vacuum cleaner |
| US5558697A (en) * | 1992-12-08 | 1996-09-24 | Notetry Limited | Dual cyclonic vacuum cleaner |
| US6183527B1 (en) | 1998-02-02 | 2001-02-06 | Black & Decker Inc. | Dust collector with work surface |
| US6146434A (en) * | 1999-02-24 | 2000-11-14 | The Hoover Company | Cyclonic dirt cup assembly |
| CN102429610A (en) * | 2011-11-28 | 2012-05-02 | 大连民族学院 | Gas-dust separation device |
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