WO2004056490A1 - Dispensador con conducto de aireacion protegido - Google Patents

Dispensador con conducto de aireacion protegido Download PDF

Info

Publication number
WO2004056490A1
WO2004056490A1 PCT/ES2002/000607 ES0200607W WO2004056490A1 WO 2004056490 A1 WO2004056490 A1 WO 2004056490A1 ES 0200607 W ES0200607 W ES 0200607W WO 2004056490 A1 WO2004056490 A1 WO 2004056490A1
Authority
WO
WIPO (PCT)
Prior art keywords
dispenser
sealing lip
head
wall
hole
Prior art date
Application number
PCT/ES2002/000607
Other languages
English (en)
Spanish (es)
French (fr)
Inventor
Francesc Xavier Gonzalez Fernandez
Pere Pares Montaner
Original Assignee
Saint-Gobain Calmar S.A.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Saint-Gobain Calmar S.A. filed Critical Saint-Gobain Calmar S.A.
Priority to PCT/ES2002/000607 priority Critical patent/WO2004056490A1/es
Priority to AU2002368479A priority patent/AU2002368479A1/en
Publication of WO2004056490A1 publication Critical patent/WO2004056490A1/es

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05BSPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/0005Components or details
    • B05B11/0037Containers
    • B05B11/0039Containers associated with means for compensating the pressure difference between the ambient pressure and the pressure inside the container, e.g. pressure relief means
    • B05B11/0044Containers associated with means for compensating the pressure difference between the ambient pressure and the pressure inside the container, e.g. pressure relief means compensating underpressure by ingress of atmospheric air into the container, i.e. with venting means
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05BSPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/10Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
    • B05B11/1001Piston pumps
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05BSPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/10Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
    • B05B11/1042Components or details
    • B05B11/105Sealing arrangements around pump actuating stem

Definitions

  • the invention relates to a dispenser with a protected aeration duct, which has a movable part that comprises a head and a stem, and a fixed part that includes a lid suitable for fixing the dispenser to a container and a chill, where the chill defines an interior space in which a piston mounted on the rod is housed and that divides the interior space into a pumping chamber and into an upper space, where the shell has an aeration hole.
  • Dispensers of the type indicated above are known. They are used for the dosage of all kinds of liquids contained in the container. Usual applications are the dosage of soaps and other cleaning products, cosmetic products, food products, pharmaceutical products, etc.
  • dispensers By dispensing a certain amount of liquid to the outside, the volume of liquid contained in it is reduced inside the container.
  • dispensers usually have an aeration duct that allows air to enter from the outside, thus preventing a vacuum from forming inside the container or collapsing the container.
  • this aeration duct carries the risk of other fluids entering the interior of the container, such as water.
  • the aeration duct is arranged between the movable part and the fixed part, so that a space is defined between the facing and relative moving surfaces of the movable part and the fixed part. tion.
  • this aeration duct is relatively accessible, so that unwanted fluids, such as water, can be introduced through it.
  • the invention aims to overcome these drawbacks.
  • This purpose is achieved by means of a dispenser of the type indicated at the beginning, characterized in that the mobile part has a second hole that communicates the upper space of the shell with the outside.
  • the mobile part always has the head at its upper end, which, for ergonomic reasons, is larger than the stem. Therefore the head can form an "umbrella effect" with respect to the environment just below it. Therefore if the second hole is arranged in this environment, this second hole will be protected by said "umbrella effect".
  • the fixed part must necessarily be away from the head, since the head must be able to move vertically to perform the pumping movement. Therefore the second hole cannot be in the fixed part, nor can it be partially formed by the fixed part, as it is known in the state of the art, but the second hole must be totally integrated in the part mobile. In this way the second hole moves together with the head and can therefore be positioned in the environment under the head. In this way, a dispenser is obtained with a protected aeration duct and without the design constraints imposed by the inclusion of protection walls such as those known in the state of the art.
  • the head has a lower annular wall and the stem has an annular groove facing the head, where the annular groove is suitable to accommodate, at least partially, the lower annular wall, where the annular groove has a base and an outer wall,
  • a preferred way of mounting the assembly formed by the stem and the head is obtained when the head has a lower annular wall in its lower part and the stem has an annular groove facing the head.
  • the lower annular wall is housed in the annular groove and is secured by some means of gluing.
  • the stem is substantially a cylindrical tube through which the pumped liquid passes.
  • the annular groove is obtained by having an outer wall that circumscribes the stem and which is separated from it by a distance approximately equal to the thickness of the lower annular wall of the head.
  • the outer wall is attached to the stem through a base which is a small transverse partition that extends between the outer wall and the stem.
  • the cover has a sealing lip of the same material as the cover, which forms a seal between the fixed part and the mobile part.
  • a watertight closure is usually not necessary, since the entire perimeter of contact between the fixed part and the mobile part can be used to allow air to enter the duct. aeration.
  • a preferred way to achieve this sealing is by including said sealing lip, which is preferably the same material as the cover. This allows the assembly to be a single piece obtained with a single manufacturing process (for example by injection). Alternatively, it is possible that the sealing lip is made of a material other than the cover, such as an elastomeric material, which can be bi-injected onto the cover. The decision between one or the other alternative will depend on the design and cost constraints of each specific solution.
  • the necessary sealing characteristics must be achieved by suitably combining parameters such as the thickness of the lip, its angle of attack and the interference between the lip and the mobile part.
  • the elastic qualities of the material can be used to optimize the tightness obtained.
  • Fig. 1 a view of a longitudinal section of a dispenser with aeration duct according to the state of the art.
  • FIG. 2 an enlarged view of the contact area between the mobile part and the fixed part of the dispenser of Fig. 1.
  • Fig. 3 a view of a cross section along the line lll-lll of the dispenser of Fig. 1.
  • Fig. 4 a view of a longitudinal section of a dispenser with aeration duct protected according to the state of the art
  • Fig. 5 an enlarged view of the contact area between the mobile part and the fixed part of the dispenser of Fig. 4.
  • Fig. 6 a cross-sectional view along line VI-VI of the dispenser of Fig. 4.
  • Fig. 7 a view of a longitudinal section of a dispenser with a protected ventilation duct according to the invention.
  • FIG. 8 and 9 an enlarged view of two alternatives of the contact area between the mobile part and the fixed part of the dispenser of Fig. 7,
  • Fig. 10 a cross-sectional view along line X-X of the dispenser of Fig. 7.
  • Figs. 1 to 3 and 4 to 6 show dispensers that are part of the state of the art.
  • the dispensers comprise a head 1, a stem 3, a casing 5, and a cap 7.
  • the casing 5 forms the pump body of the dispenser and defines an interior space inside.
  • the stem 3 is partially inserted into the shell 5.
  • Inside the shell 5, and mounted on the stem 3 is a piston 9 that moves jointly with the stem 3 in a manner known to a person skilled in the art.
  • the piston 9 divides the interior space into two parts: a pumping chamber 11 and an upper space 13.
  • the shell 5 has an aeration hole 15 that communicates the upper space 13 with the interior of the container on which the dispenser.
  • the shell 5 is jointly attached to the lid 7 forming the fixed part of the dispenser, which is attached jointly to the container. From the upper end of the shell 5 protrudes the stem 3 on whose top end the head 1 is mounted. The stem 3 and the shell 5 move in the vertical direction during actuation of the dispenser, and thus form the moving part of the dispenser.
  • the dispenser comprises other elements, such as, for example, the aforementioned piston 9, or for example a spring 17 that tends to move the rod 3 towards its extended position, the assignment of which to the aforementioned fixed part and mobile part is not relevant in face Therefore, with regard to the present invention, it should not be interpreted that the moving part is solely and exclusively composed of the stem 3 and the head 1, nor that the fixed part is solely and exclusively composed of the cover 7 and the shell 5.
  • Fig. 1 the path followed by the air as it is sucked through the aeration duct is shown as a hatched area.
  • the air passes through a gap between the stem 3 and the lid 7, as clearly seen in Fig. 2.
  • the air travels through the upper space 13 to the aeration hole 15 and enters the interior of the container.
  • it is possible that in the vicinity of the contact area between the fixed part and the mobile part of the dispenser there is water that can be sucked inwards.
  • a dispenser very similar to that of Figs. 1 to 3, but which has the aeration duct protected by walls that define a labyrinth.
  • the cap 7 has a first annular wall 19 that flanges the stem 3.
  • the head 1 has a second annular wall 21 that flanges the first annular wall 19. Between the stem 3, the first wall 19 and the second wall 21 there are gaps large enough to allow the passage of air, as can be clearly seen in Figs. 5 and 6.
  • the path followed by the air as it is sucked through the suction line has been shown again as a hatched area.
  • Air passes through the gap between the first wall 19 and the second wall 21, then passes through the gap between the first wall 19 and the stem 3 until reaching the upper space 13. From the upper space 13 it passes into the container a through the aeration hole 15. As can be seen in this case, the aeration duct is more protected than in the dispenser of Fig. 1 and it is more difficult for water to enter the interior of the container. Without However the introduction of these walls 19 and 21 forces to increase the height of the dispenser.
  • Figs. 7 to 10 a preferred embodiment of a dispenser according to the invention is shown.
  • the basic structure of the dispenser is very similar to that of the dispensers in Figs. 1 and 4, and equal reference numbers have been used for the equivalent parts.
  • the head 1 has a lower annular wall 23 and the stem 3 has an annular groove 25 facing the head 1 and which is formed by an outer wall 27 and a base 29.
  • the stem 3 is substantially a tube through which the liquid pumped from the pumping chamber 11 to an outlet duct 31 arranged in the head 1.
  • the outer wall 27 surrounds the stem 3 and is attached to the stem 3 through the base 29, which is a small protruding partition. radially of the stem 3.
  • the annular groove 25 is defined, which is suitable for housing the lower annular wall 23 of the head 1.
  • the base 29 has two second holes 33. Following said second holes 33 there are intermediate spaces 35 that allow air to come from the outside to said second holes 33. Once the air has reached said second holes 33, it can move along the es upper space 13 to the vent hole 15, as symbolized by the hatched area in Fig. 7.
  • the air inlet is housed just below the widened part of the head 1. In this way it is almost impossible for water to enter the device. However, no condition is imposed on the design of the dispenser, as was the case with the incorporation of the first wall 19 and the second wall 21.
PCT/ES2002/000607 2002-12-20 2002-12-20 Dispensador con conducto de aireacion protegido WO2004056490A1 (es)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/ES2002/000607 WO2004056490A1 (es) 2002-12-20 2002-12-20 Dispensador con conducto de aireacion protegido
AU2002368479A AU2002368479A1 (en) 2002-12-20 2002-12-20 Dispenser with protected air conduit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/ES2002/000607 WO2004056490A1 (es) 2002-12-20 2002-12-20 Dispensador con conducto de aireacion protegido

Publications (1)

Publication Number Publication Date
WO2004056490A1 true WO2004056490A1 (es) 2004-07-08

Family

ID=32669089

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/ES2002/000607 WO2004056490A1 (es) 2002-12-20 2002-12-20 Dispensador con conducto de aireacion protegido

Country Status (2)

Country Link
AU (1) AU2002368479A1 (de)
WO (1) WO2004056490A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102369066A (zh) * 2009-04-02 2012-03-07 埃姆萨股份公司 分配器

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0516472A1 (de) * 1991-05-31 1992-12-02 Calmar Inc. Pumpenabgeber für Flüssigkeiten
US5738250A (en) * 1997-04-07 1998-04-14 Calmar Inc. Liquid dispensing pump having water seal
ES2187231A1 (es) * 1998-04-30 2003-05-16 Saint Gobain Calmar Sa Perfeccionamientos en el objeto de la patente p 9800915 por dispensador de bomba para fluidos.

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0516472A1 (de) * 1991-05-31 1992-12-02 Calmar Inc. Pumpenabgeber für Flüssigkeiten
US5738250A (en) * 1997-04-07 1998-04-14 Calmar Inc. Liquid dispensing pump having water seal
ES2187231A1 (es) * 1998-04-30 2003-05-16 Saint Gobain Calmar Sa Perfeccionamientos en el objeto de la patente p 9800915 por dispensador de bomba para fluidos.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102369066A (zh) * 2009-04-02 2012-03-07 埃姆萨股份公司 分配器

Also Published As

Publication number Publication date
AU2002368479A1 (en) 2004-07-14

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