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WO1994007113A1 - Liquid dispenser - Google Patents

Liquid dispenser Download PDF

Info

Publication number
WO1994007113A1
WO1994007113A1 PCT/EP1993/002382 EP9302382W WO9407113A1 WO 1994007113 A1 WO1994007113 A1 WO 1994007113A1 EP 9302382 W EP9302382 W EP 9302382W WO 9407113 A1 WO9407113 A1 WO 9407113A1
Authority
WO
WIPO (PCT)
Prior art keywords
bellow
housing
bellow pump
pump
dispenser
Prior art date
Application number
PCT/EP1993/002382
Other languages
French (fr)
Inventor
Gerrit Klaas Bunschoten
Lambertus Gerardus P. Van Der Heyden
Original Assignee
Unilever N.V.
Unilever Plc
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 Unilever N.V., Unilever Plc filed Critical Unilever N.V.
Priority to AU49570/93A priority Critical patent/AU4957093A/en
Publication of WO1994007113A1 publication Critical patent/WO1994007113A1/en

Links

Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47K—SANITARY EQUIPMENT NOT OTHERWISE PROVIDED FOR; TOILET ACCESSORIES
    • A47K5/00—Holders or dispensers for soap, toothpaste, or the like
    • A47K5/06—Dispensers for soap
    • A47K5/12—Dispensers for soap for liquid or pasty soap
    • A47K5/1202—Dispensers for soap for liquid or pasty soap dispensing dosed volume
    • A47K5/1208—Dispensers for soap for liquid or pasty soap dispensing dosed volume by means of a flexible dispensing chamber
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F11/00—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it
    • G01F11/02—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it with measuring chambers which expand or contract during measurement
    • G01F11/08—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it with measuring chambers which expand or contract during measurement of the diaphragm or bellows type

Definitions

  • the present invention is concerned with a dispenser of the kind for delivering aliquots of a liquid product from a reservoir by means of a pump which is manually operable.
  • a dispenser of the kind for delivering aliquots of a liquid product from a reservoir by means of a pump which is manually operable.
  • Such dispensers are often used in washrooms etc. for dispensing small amounts of a liquid soap product for hand washing purposes.
  • the US-patent 4,256,242 discloses a liquis soap dispenser comprising a housing, a collapsible bag for holding the liquid soap product and an operating lever or handle for actuating controlled amounts of soap from the bag.
  • the collapsible bag is connected to an outlet by means of a flexible conduit which comprises a pump.
  • These known types of dispensers offer hygiene and ease of handling for the user.
  • one problem with this kind of dispensers resides in the fact that only a small amount of liquid soap may be dispensed at the time due to the limited capacity of the peristaltic type of pump applied. The amount is usually not more than 0.5 to l ml.
  • Another problem which has been encountered with this type of pump is related to the way the pump operates: after the pump has been actuated the pump tubing recovers to its original shape and thereby sucks in liquid product for the next shot.
  • This sucking action of the tubing is directly related to the memory properties thereof which could decline depending on the material of the tubing and the operating time of the pump. As a consequence, the dosage of the pump per shot could decline.
  • the dispenser disclosed by this document comprises a disposable refill which comprises a reservoir and the bellow pump.
  • the disclosed dispenser is a rather specific one in that it can only be activated by electromagnetic means.
  • the present invention provides a dispenser for delivering aliquots of a liquid product comprising a housing (1) and a disposable refill package which is positioned inside the housing and comprises a collapsible reservoir (2) for the liquid product fitted with a bellow pump (3) , whereby the bellow pump comprises a product inlet valve and a product outlet valve and is manually operable via indirect ac- tuating means (10,11), and whereby the housing is provided with a narrow opening (9) into which a correspondingly shaped portion of the bellow pump located near the outlet valve thereof, can be securely fitted.
  • the present invention also provides a disposable refill package suitable for use in a dispenser according to the invention, comprising a collapsible reservoir (2) filled with a liquid product and attached thereto a bellow pump (3) provided with a narrow potion (9) which can be securely fitted into a correspondingly shaped opening located in the housing (1) of the dispenser.
  • the disposable refill package applied in the dispensing system of the present invention comprises a reservoir which is made of plastic material such as polyethylene, polypropylene and PVC.
  • plastic material such as polyethylene, polypropylene and PVC.
  • the refill is made of one piece.
  • the bellow pump comprises a liquid inlet valve and a liquid outlet valve which are respectively closed and opened by manually operable actuating means during each dose.
  • the liquid outlet valve is closed, the liquid inlet valve is opened by the suction action of the bellow when it recovers to its original position.
  • full liquid communication with the reservoir is achieved and the internal volume of the bellow pump is refilled by liquid sucked in from out of the reser ⁇ voir.
  • this action of the liquid inlet and outlet valves present in the bellow pump during and im ⁇ mediately after each dose no air can enter the internal volume of bellow pump and reservoir and the risk of con ⁇ tamination of the liquid to be dispensed is minimized.
  • the material of the bellow pump is preferably such that the suction action of the bellow pump is kept more or less constant, also after many dosages have been done.
  • the bellow pump is preferably equipped with an external spring. This spring ensures that constant dosage volumes are obtained during the operating life of the dispenser even with highly viscous liquids because it forces the bellow pump back into its original shape after each dose.
  • the housing is provided with a narrow opening into which a correspondingly shaped portion of the bellow pump located near the outlet valve thereof can be fitted. Furthermore, this narrow opening ensures that only refill packs con ⁇ taining the desired type of liquid product will be mounted in the dispenser, because other packs containing different products simply will not fit.
  • This narrow opening is desirably in the form of a slit having a width of less than 5 mm, preferably less than 2 mm.
  • the bellow pump is desirably provided with a discharge tube comprising a flow channel having a narrow internal opening with a diameter of less than 3 mm, preferably less than 2 mm.
  • a discharge tube comprising a flow channel having a narrow internal opening with a diameter of less than 3 mm, preferably less than 2 mm.
  • the dispenser of the present invention is equipped with manually operable in ⁇ direct actuating means. These may practically comprise a push rod which is coupled to the bellow pump via a tilting table.
  • the internal volume of the reservoir gradually decreases when liquid product is taken out and dispensed.
  • underpressure is created and, as a consequence, the bellow of the pump will be kept in a collapsed position.
  • the resulting reduction in length of the bellow pump can be used as an empty pack indicator.
  • Dispensers comprising a bellow pump with a dosing capacity of from about 0.1 to 10 ml are very suitable for use in washrooms. This type of dispensers having a dosing capacity in the mentioned range can be made much more compact than dispensers with peristaltic or plunger pumps with the same dosing capacity.
  • Figure 1 shows cross-sectional views of a dispenser accor ⁇ ding to the invention including a housing, a collapsible reservoir and a bellow pump, whereby the bellow pump is not activated (a) respectively activated (b) ;
  • Figure 2 shows a cross-sectional view of the bellow pump, including an inlet and outlet valve, and a discharge tube.
  • a housing (1) comprising a refill package which comprises a reservoir (2) and a bellow pump
  • the dispenser can be manually operated with indirect actuating means comprising a push rod (10) which is coupled to a tilting table (11) which in turn is connected to the bellow pump (3) .
  • a narrow portion (9) is connected to the bellow pump (3) which portion is used for securely positioning the refill package in the housing of the dispenser. Furthermore, the bellow pump is provided with a discharge tube (8) which comprises a flow channel having a narrow internal opening.
  • an external spring (12) is present between tilting table (11) and the housing. This spring ensures that constant volumes are dosed even when applying high viscosity liquids.
  • Figure 2 shows a bellow pump provided with an inlet valve (4) , an outlet valve (5) and a bellow section (6) . Because the internal volume of the bellow pump contains the liquid to be dispensed during the next dose, the bellow pump functions as a type of dosing section.

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)

Abstract

There is provided a dispenser for delivering aliquots of a liquid product comprising a housing (1) and a disposable refill package which is positioned inside the housing and comprises a collapsible reservoir (2) for the liquid product fitted with a bellow pump (3), whereby the bellow pump comprises an inlet valve (4) and an outlet valve (5) and is manually operable via indirect actuating means (10, 11), and whereby the housing is provided with a narrow opening into which a correspondingly shaped portion (9) of the bellow pump located near the outlet valve thereof, can be securely fitted.

Description

LIQUID DISPENSER
TECHNICAL FIELD OF THE INVENTION
The present invention is concerned with a dispenser of the kind for delivering aliquots of a liquid product from a reservoir by means of a pump which is manually operable. Such dispensers are often used in washrooms etc. for dispensing small amounts of a liquid soap product for hand washing purposes.
BACKGROUND AND PRIOR ART
Various dispensers of the above-indicated kind have been described in the literature. For example, the US-patent 4,256,242 (Christine) discloses a liquis soap dispenser comprising a housing, a collapsible bag for holding the liquid soap product and an operating lever or handle for actuating controlled amounts of soap from the bag. The collapsible bag is connected to an outlet by means of a flexible conduit which comprises a pump. These known types of dispensers offer hygiene and ease of handling for the user. However, one problem with this kind of dispensers resides in the fact that only a small amount of liquid soap may be dispensed at the time due to the limited capacity of the peristaltic type of pump applied. The amount is usually not more than 0.5 to l ml.
Another problem which has been encountered with this type of pump is related to the way the pump operates: after the pump has been actuated the pump tubing recovers to its original shape and thereby sucks in liquid product for the next shot. This sucking action of the tubing is directly related to the memory properties thereof which could decline depending on the material of the tubing and the operating time of the pump. As a consequence, the dosage of the pump per shot could decline. In order to overcome this problem, it has been proposed in the British patent application 2 103 296 to provide the dispenser with a bellow pump fitted with an external spring. As a result of this spring, the recovery properties of the bellow pump can be optimized to such extent that even liquid products of high viscosity can be satisfac¬ torily applied in this dispenser. For reasons of easy handling, the dispenser disclosed by this document comprises a disposable refill which comprises a reservoir and the bellow pump.
However, the disclosed dispenser is a rather specific one in that it can only be activated by electromagnetic means.
It is an object of the present invention to provide a dispenser of the afore-mentioned kind, which does not pos¬ sess these and other disadvantages. It is also an object to provide a dispenser which can be simply constructed, is user-friendly, and can be easily refilled. We have now found that these and other objects can be achieved by the dispenser of the present invention.
DEFINITION OF THE INVENTION
The present invention provides a dispenser for delivering aliquots of a liquid product comprising a housing (1) and a disposable refill package which is positioned inside the housing and comprises a collapsible reservoir (2) for the liquid product fitted with a bellow pump (3) , whereby the bellow pump comprises a product inlet valve and a product outlet valve and is manually operable via indirect ac- tuating means (10,11), and whereby the housing is provided with a narrow opening (9) into which a correspondingly shaped portion of the bellow pump located near the outlet valve thereof, can be securely fitted. The present invention also provides a disposable refill package suitable for use in a dispenser according to the invention, comprising a collapsible reservoir (2) filled with a liquid product and attached thereto a bellow pump (3) provided with a narrow potion (9) which can be securely fitted into a correspondingly shaped opening located in the housing (1) of the dispenser.
DETAILED DESCRIPTION OF THE INVENTION
Preferably, the disposable refill package applied in the dispensing system of the present invention comprises a reservoir which is made of plastic material such as polyethylene, polypropylene and PVC. For reasons of con¬ venience and in order to reduce the risk that the liquid to be dispensed is contaminated when installing a new refill, the refill is made of one piece.
The bellow pump comprises a liquid inlet valve and a liquid outlet valve which are respectively closed and opened by manually operable actuating means during each dose. Immediately after each dose, when the liquid outlet valve is closed, the liquid inlet valve is opened by the suction action of the bellow when it recovers to its original position. As a result, full liquid communication with the reservoir is achieved and the internal volume of the bellow pump is refilled by liquid sucked in from out of the reser¬ voir. As a consequence of this action of the liquid inlet and outlet valves present in the bellow pump during and im¬ mediately after each dose, no air can enter the internal volume of bellow pump and reservoir and the risk of con¬ tamination of the liquid to be dispensed is minimized.
The material of the bellow pump is preferably such that the suction action of the bellow pump is kept more or less constant, also after many dosages have been done. When the dispenser is used for dispensing more viscous types of liquid, the bellow pump is preferably equipped with an external spring. This spring ensures that constant dosage volumes are obtained during the operating life of the dispenser even with highly viscous liquids because it forces the bellow pump back into its original shape after each dose.
In order to ensure that the refill package is easily and securely fitted in the housing of the dispenser, the housing is provided with a narrow opening into which a correspondingly shaped portion of the bellow pump located near the outlet valve thereof can be fitted. Furthermore, this narrow opening ensures that only refill packs con¬ taining the desired type of liquid product will be mounted in the dispenser, because other packs containing different products simply will not fit.
This narrow opening is desirably in the form of a slit having a width of less than 5 mm, preferably less than 2 mm.
The bellow pump is desirably provided with a discharge tube comprising a flow channel having a narrow internal opening with a diameter of less than 3 mm, preferably less than 2 mm. The advantage of this type of discharge tube is that the flow rate of the liquid product flowing out of the bellow pump during each dose, is increased due to the narrow internal opening, which proved to have a self- cleaning effect on the flow channel. The possibility of bacterial growth entering the valve is thereby further diminished.
For reasons of ease of handling, the dispenser of the present invention is equipped with manually operable in¬ direct actuating means. These may practically comprise a push rod which is coupled to the bellow pump via a tilting table.
The internal volume of the reservoir gradually decreases when liquid product is taken out and dispensed. When the reservoir is pumped empty, underpressure is created and, as a consequence, the bellow of the pump will be kept in a collapsed position. The resulting reduction in length of the bellow pump can be used as an empty pack indicator.
Dispensers comprising a bellow pump with a dosing capacity of from about 0.1 to 10 ml are very suitable for use in washrooms. This type of dispensers having a dosing capacity in the mentioned range can be made much more compact than dispensers with peristaltic or plunger pumps with the same dosing capacity.
The invention wil now be better explained by way of the preferred embodiment shown in the accompanying drawings of which: Figure 1 shows cross-sectional views of a dispenser accor¬ ding to the invention including a housing, a collapsible reservoir and a bellow pump, whereby the bellow pump is not activated (a) respectively activated (b) ; Figure 2 shows a cross-sectional view of the bellow pump, including an inlet and outlet valve, and a discharge tube.
In Figure 1, a housing (1) is shown comprising a refill package which comprises a reservoir (2) and a bellow pump
(3) . The dispenser can be manually operated with indirect actuating means comprising a push rod (10) which is coupled to a tilting table (11) which in turn is connected to the bellow pump (3) .
As shown in Figure 1, a narrow portion (9) is connected to the bellow pump (3) which portion is used for securely positioning the refill package in the housing of the dispenser. Furthermore, the bellow pump is provided with a discharge tube (8) which comprises a flow channel having a narrow internal opening.
It can also be noticed that an external spring (12) is present between tilting table (11) and the housing. This spring ensures that constant volumes are dosed even when applying high viscosity liquids.
Figure 2 shows a bellow pump provided with an inlet valve (4) , an outlet valve (5) and a bellow section (6) . Because the internal volume of the bellow pump contains the liquid to be dispensed during the next dose, the bellow pump functions as a type of dosing section.
It is emphasized that the dispenser shown in the Figure illustrates only a preferred embodiment of the invention and that various constructional alternatives will be im¬ mediately evident to the man skilled in the art, without departing from the scope of the present invention.

Claims

1. A dispenser for delivering aliquots of a liquid product comprising a housing (1) and a disposable refill package which is positioned inside the housing and comprises a collapsible reservoir (2) for the liquid product fitted with a bellow pump (3) , whereby the bellow pump comprises an inlet valve (4) and an outlet valve (5) and is manually operable via indirect actuating means (10,11), and whereby the housing is provided with a narrow opening into which a correspondingly shaped portion (9) of the bellow pump located near the outlet valve thereof, can be securely fitted.
2. A dispenser according to claim 1 , wherein the bellow pump is provided with an external spring (12) .
3. A dispenser according to claim 1 or 2, wherein the narrow opening in the housing (1) is in the form of a slit having a width less than 5 mm, preferably less than 2 mm.
4. A dispenser according to any of claims 1-3 , wherein the bellow pump is provided with a discharge tube (8) comprising a flow channel having a diameter of less than 3 mm, preferably less than 2 mm.
5. A dispenser according to any of claims 1-4, wherein the bellow of the bellow pump is kept in a collapsed position as a result of the underpressure created when the reservoir is pumped empty.
6. A dispenser according to any of claims 1-5, wherein the bellow pump has a capacity of from about 0.1 to about 10 ml.
7. A disposable refill package suitable for use in a dispenser according to any of claims 1-5, comprising a collapsible reservoir (2) filled with a liquid product and attached thereto a bellow pump (3) provided with a narrow portion (9) which can be securely fitted into a correspon¬ dingly shaped opening located in the housing (1) of the dispenser.
******
PCT/EP1993/002382 1992-09-18 1993-09-01 Liquid dispenser WO1994007113A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU49570/93A AU4957093A (en) 1992-09-18 1993-09-01 Liquid dispenser

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP92202860 1992-09-18
EP92202860.0 1992-09-18

Publications (1)

Publication Number Publication Date
WO1994007113A1 true WO1994007113A1 (en) 1994-03-31

Family

ID=8210920

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1993/002382 WO1994007113A1 (en) 1992-09-18 1993-09-01 Liquid dispenser

Country Status (3)

Country Link
AU (1) AU4957093A (en)
WO (1) WO1994007113A1 (en)
ZA (1) ZA936702B (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997015223A1 (en) * 1995-10-23 1997-05-01 Unilever N.V. Liquid dispenser
WO2005070272A1 (en) * 2004-01-22 2005-08-04 Stewart Robertson Dispensing apparatus and method
DE102005006845A1 (en) * 2005-02-14 2006-08-17 Stockhausen Gmbh donor
EP2384677A1 (en) * 2010-05-03 2011-11-09 Hübner GmbH Bellows pump for a soap dispenser having collapsible pleats
US8636484B2 (en) 2009-01-09 2014-01-28 Tom M. Simmons Bellows plungers having one or more helically extending features, pumps including such bellows plungers, and related methods

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2727679A1 (en) * 1977-04-27 1978-11-09 Kaiser Fa Otto Liq. soap dispenser - is operated by one hand by push button, and consists of pump, bottle, valve and nozzle
FR2392366A2 (en) * 1977-01-06 1978-12-22 Prodene Long life dispenser for fluids and creams - has guide sleeve allowing intake and delivery of measured amounts by plunger
US4256242A (en) * 1979-10-23 1981-03-17 Christine William C Dispenser having a roller for squeezing amounts from a tube
FR2502774A1 (en) * 1981-03-26 1982-10-01 Dagma Gmbh & Co METHOD AND APPARATUS FOR DISPENSING VISCOUS VARIABLE VISCOSITY CONCENTRATES IN EXACTLY DOSABLE QUANTITIES OF VARIABLE VOLUME
EP0304567A1 (en) * 1987-07-07 1989-03-01 Raimund Andris Dosing pump for liquid and/or viscous products
US4978036A (en) * 1988-11-15 1990-12-18 Koller Enterprises, Inc. Dispensing valve

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2392366A2 (en) * 1977-01-06 1978-12-22 Prodene Long life dispenser for fluids and creams - has guide sleeve allowing intake and delivery of measured amounts by plunger
DE2727679A1 (en) * 1977-04-27 1978-11-09 Kaiser Fa Otto Liq. soap dispenser - is operated by one hand by push button, and consists of pump, bottle, valve and nozzle
US4256242A (en) * 1979-10-23 1981-03-17 Christine William C Dispenser having a roller for squeezing amounts from a tube
FR2502774A1 (en) * 1981-03-26 1982-10-01 Dagma Gmbh & Co METHOD AND APPARATUS FOR DISPENSING VISCOUS VARIABLE VISCOSITY CONCENTRATES IN EXACTLY DOSABLE QUANTITIES OF VARIABLE VOLUME
GB2103296A (en) * 1981-03-26 1983-02-16 Dagma Gmbh & Co Method of and device for dispensing viscous concentrates
EP0304567A1 (en) * 1987-07-07 1989-03-01 Raimund Andris Dosing pump for liquid and/or viscous products
US4978036A (en) * 1988-11-15 1990-12-18 Koller Enterprises, Inc. Dispensing valve

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997015223A1 (en) * 1995-10-23 1997-05-01 Unilever N.V. Liquid dispenser
AU721392B2 (en) * 1995-10-23 2000-06-29 Diversey, Inc. Liquid dispenser
WO2005070272A1 (en) * 2004-01-22 2005-08-04 Stewart Robertson Dispensing apparatus and method
DE102005006845A1 (en) * 2005-02-14 2006-08-17 Stockhausen Gmbh donor
US7992804B2 (en) 2005-02-14 2011-08-09 Stockhausen Gmbh Dispenser
US8636484B2 (en) 2009-01-09 2014-01-28 Tom M. Simmons Bellows plungers having one or more helically extending features, pumps including such bellows plungers, and related methods
EP2384677A1 (en) * 2010-05-03 2011-11-09 Hübner GmbH Bellows pump for a soap dispenser having collapsible pleats
RU2488548C2 (en) * 2010-05-03 2013-07-27 ХЮБНЕР ГмбХ Pump for skin care product

Also Published As

Publication number Publication date
ZA936702B (en) 1995-03-10
AU4957093A (en) 1994-04-12

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