WO2013160071A1 - A foam dispenser - Google Patents

A foam dispenser Download PDF

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Publication number
WO2013160071A1
WO2013160071A1 PCT/EP2013/056901 EP2013056901W WO2013160071A1 WO 2013160071 A1 WO2013160071 A1 WO 2013160071A1 EP 2013056901 W EP2013056901 W EP 2013056901W WO 2013160071 A1 WO2013160071 A1 WO 2013160071A1
Authority
WO
WIPO (PCT)
Prior art keywords
air
foam
liquid
chamber
mixing channel
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.)
Ceased
Application number
PCT/EP2013/056901
Other languages
English (en)
French (fr)
Inventor
Stewart Banks
Christopher James Lang
Dean Philip Limbert
David Michael Ross Creaghan
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pibed Ltd
Original Assignee
Pibed Ltd
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
Priority to EP13713448.2A priority Critical patent/EP2855029B1/en
Priority to IN2334MUN2014 priority patent/IN2014MN02334A/en
Priority to BR122016006992-3A priority patent/BR122016006992B1/pt
Priority to CN201380022284.8A priority patent/CN104321148B/zh
Priority to SG11201406944VA priority patent/SG11201406944VA/en
Priority to JP2015507446A priority patent/JP6077644B2/ja
Priority to MX2014013058A priority patent/MX342382B/es
Priority to CA2870575A priority patent/CA2870575C/en
Priority to MX2016005431A priority patent/MX387249B/es
Application filed by Pibed Ltd filed Critical Pibed Ltd
Priority to BR112014026714-6A priority patent/BR112014026714B1/pt
Priority to US14/383,388 priority patent/US9073066B2/en
Priority to NZ629340A priority patent/NZ629340A/en
Priority to AU2013203276A priority patent/AU2013203276B2/en
Priority to HK15103144.2A priority patent/HK1202483B/xx
Publication of WO2013160071A1 publication Critical patent/WO2013160071A1/en
Priority to PH12014502411A priority patent/PH12014502411A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/0018—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with devices for making foam
    • B05B7/005—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with devices for making foam wherein ambient air is aspirated by a liquid flow
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/232—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using flow-mixing means for introducing the gases, e.g. baffles
    • B01F23/2323—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using flow-mixing means for introducing the gases, e.g. baffles by circulating the flow in guiding constructions or conduits
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/235—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids for making foam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B01F23/29—Mixing systems, i.e. flow charts or diagrams
    • B01F23/291—Mixing systems, i.e. flow charts or diagrams for obtaining foams or aerosols
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/30—Injector mixers
    • B01F25/31—Injector mixers in conduits or tubes through which the main component flows
    • B01F25/314—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced at the circumference of the conduit
    • B01F25/3142—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced at the circumference of the conduit the conduit having a plurality of openings in the axial direction or in the circumferential direction
    • B01F25/31422—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced at the circumference of the conduit the conduit having a plurality of openings in the axial direction or in the circumferential direction with a plurality of perforations in the axial direction only
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/0005—Components or details
    • B05B11/0062—Outlet valves actuated by the pressure of the fluid to be sprayed
    • B05B11/007—Outlet valves actuated by the pressure of the fluid to be sprayed being opened by deformation of a sealing element made of resiliently deformable material, e.g. flaps, skirts, duck-bill valves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-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
    • B05B11/10—Pump 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
    • B05B11/1001—Piston pumps
    • B05B11/1015—Piston pumps actuated without substantial movement of the nozzle in the direction of the pressure stroke
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-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
    • B05B11/10—Pump 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
    • B05B11/1042—Components or details
    • B05B11/1052—Actuation means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-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
    • B05B11/10—Pump 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
    • B05B11/1042—Components or details
    • B05B11/1066—Pump inlet valves
    • B05B11/1067—Pump inlet valves actuated by pressure
    • B05B11/1069—Pump inlet valves actuated by pressure the valve being made of a resiliently deformable material or being urged in a closed position by a spring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-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
    • B05B11/10—Pump 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
    • B05B11/1042—Components or details
    • B05B11/1073—Springs
    • B05B11/1077—Springs characterised by a particular shape or material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-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
    • B05B11/10—Pump 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
    • B05B11/1087—Combination of liquid and air pumps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/0018—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with devices for making foam
    • B05B7/0025—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with devices for making foam with a compressed gas supply
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/04—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge
    • B05B7/0416—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing one gas and one liquid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-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
    • B05B11/10—Pump 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
    • B05B11/1028—Pumps having a pumping chamber with a deformable wall

Definitions

  • This disclosure relates to foam dispensers and in particular to dispensers that may have a resiliently deformable dome piston and dispensers that may have an improved mixing chamber.
  • the present disclosure relates to foam dispensers and more specifically non-aerosol foam dispensers or unpressurized foam dispensers.
  • the popularity of these type of foam dispensers has increased dramatically over the last decade and they are now used widely throughout the world.
  • the advantage of foam dispensers over conventional liquid dispensers is that they use substantially less liquid for each use or shot. For example if the foam dispenser is being used for hand hygiene either as a soap dispenser or an alcohol foam dispenser, each hand cleansing event uses substantially less liquid than would be used with a straight liquid dispenser.
  • a foam assembly connectable to a liquid container includes a main pump body, a piston dome, an air chamber, a liquid chamber, a mixing zone and a porous member.
  • the main pump body has an exit nozzle.
  • the piston dome is attached to the main pump body, whereby the piston dome is a resiliently
  • the deformable piston dome and has an at rest position and a depressed position.
  • the air chamber is defined by the piston dome and the main pump body.
  • the liquid chamber is defined by the piston dome and the main pump body and has a liquid inlet valve and a liquid outlet valve.
  • the mixing zone is in flow communication with the air chamber and is in flow communication with the liquid chamber.
  • the porous member is in the exit nozzle downstream of the mixing zone. The volume of the air chamber and volume of the liquid chamber is dependent on the position of piston dome and during an activation stroke the piston moves from the at rest position to the depressed position and responsively the volume of the air chamber and the volume of the liquid chamber are reduced.
  • a foam dispenser includes a liquid container; a main pump body, a piston dome, an air chamber, a liquid chamber, a mixing zone and a porous member.
  • the main pump body has an exit nozzle.
  • the piston dome is attached to the main pump body, whereby the piston dome is a resiliently deformable piston dome and has an at rest position and a depressed position.
  • the air chamber is defined by the piston dome and the main pump body.
  • the liquid chamber is defined by the piston dome and the main pump body and has a liquid inlet valve and a liquid outlet valve.
  • the mixing zone is in flow communication with the air chamber and is in flow communication with the liquid chamber.
  • the porous member is in the exit nozzle downstream of the mixing zone.
  • the volume of the air chamber and volume of the liquid chamber is dependent on the position of piston dome and during an activation stroke the piston moves from the at rest position to the depressed position and responsively the volume of the air chamber and the volume of the liquid chamber are reduced.
  • the main pump body may include a main pump body portion and a liquid and air bore.
  • the liquid inlet valve may be integrally formed in the liquid and air bore.
  • the liquid and air bore may further include an air path integrally formed therein wherein the air path extends between the air chamber and the mixing zone.
  • the foam assembly may further include an air inlet valve in flow communication with the liquid container.
  • the air inlet valve may be integrally formed in the liquid and air bore.
  • the mixing zone may include an elongate mixing channel and the mixing channel may have an upstream end and a downstream end and the liquid chamber may be in flow communication with the upstream end of mixing channel via the liquid outlet valve.
  • the foam assembly may further include a chamfer at the downstream end of the mixing channel whereby the chamfer expands in a downstream direction.
  • the mixing channel may further include a plurality of air ports spaced downstream from the upstream end of the mixing channel.
  • the foam assembly may further include a mixing tube and the mixing channel and chamfer may be formed in the mixing tube. Further the air ports may also be formed in the mixing tube. There may be a plurality of air ports. The plurality of air ports may be four air ports equally spaced around the mixing channel. The plurality of air ports may be two air ports equally spaced around the mixing channel.
  • the foam assembly may further include one foam tube wherein the foam tube has a porous member attached to one end thereof.
  • the foam tube may have a second porous member attached to the other end thereof.
  • the foam assembly may further include a second foam tube wherein the second foam tube has a porous member attached to one end thereof.
  • the liquid container may be an upright liquid container, an inverted liquid container, an inverted pouch, or an upright pouch.
  • the mixing zone may include at least one air port upstream of the elongate mixing channel.
  • the foam dispenser may include a dispenser housing having a push bar for engaging the piston dome.
  • a mixing tube for use in a foam assembly having an air chamber and a liquid chamber and a means for pressurizing the air chamber and the liquid chamber includes an elongate mixing channel and an exit zone.
  • the elongate mixing channel has an upstream end and a downstream end.
  • the exit zone is at the downstream end of the mixing channel whereby the exit zone chamfer expands in a downstream direction.
  • the exit zone may be a chamfer that expands in a downstream direction.
  • the elongate mixing channel and the exit zone may form an elongate venturi tube.
  • the mixing tube may include at least one air port in the elongate mixing channel and the air port is in flow communication with the air chamber.
  • the air port may be a plurality of air ports spaced around the mixing channel.
  • a foam assembly connectable to a liquid container includes a pump, a mixing zone and a porous member.
  • the pump has an air chamber and a liquid chamber.
  • the pump has an activation stroke wherein the pump moves from an at rest position to a compressed position and a return stroke wherein the pump moves from the compressed position to an at rest position.
  • the volume of the air chamber and liquid chamber are each substantially smaller in the compressed position.
  • the mixing zone is in flow communication with the air chamber and in flow
  • the mixing zone has an elongate mixing channel having a cross sectional area and an exit zone downstream of the elongate mixing channel.
  • the exit zone has a cross sectional area larger than the mixing channel cross sectional area.
  • the porous member is downstream of the mixing zone.
  • the exit zone may be a chamfer that expands in a downstream direction.
  • the elongate mixing channel and the exit zone together may form an elongate venturi tube.
  • At least one air port may be formed in the elongate mixing channel and each air port is in flow communication with the air chamber.
  • the at least one air port may be a plurality of air ports spaced around the elongate mixing channel.
  • the volume of the liquid chamber to the air chamber may be between
  • the volume of the liquid chamber to the air chamber may be between 1 :8 and 1 :9
  • Fig. 1 is a perspective view of an embodiment of a foam dispenser
  • Fig. 2 is a sectional view of the foam dispenser of figure 1
  • Fig. 3 is a blown apart perspective view of the foam dispenser of figures 1 and 2;
  • Fig. 4 is a sectional view of the assembled pump body including a main pump body portion and a liquid and air bore of the foam dispenser;
  • Fig. 5 is an enlarged sectional view of a portion of the assembled pump body including a main pump body portion and a liquid and air bore showing the air inlet valve;
  • Fig. 6 is an enlarged sectional view of a portion of the pump body including a main pump body portion and a liquid and air bore showing the liquid outlet valve in the closed position;
  • Fig. 7 is an enlarged sectional view of a portion of the pump body including a main pump body portion and a liquid and air bore similar to that shown in figure 6 but showing the liquid outlet valve in the open position;
  • Fig. 8 is an enlarged sectional view of a portion of the pump body including a main pump body portion and a liquid and air bore similar to that shown in figure 6 but also including the mixing tube;
  • Fig. 9 is an enlarged perspective view of the mixing tube;
  • Fig. 10 is an enlarged sectional view of the foam tube;
  • Fig. 1 1 is an enlarged sectional view of a portion of the pump body including a main pump body portion and a liquid and air bore similar to that shown in figure 8 but also including the foam tube;
  • Fig. 12 is an enlarged sectional view of a portion of the pump body including a main pump body portion and a liquid and air bore similar to that shown in figure 1 1 and showing the air flow during the activation stroke;
  • Fig. 13 is an enlarged sectional view of a portion of the pump body including a main pump body portion and a liquid and air bore similar to that shown in figure 1 1 and showing the air flow during the return stroke;
  • Fig. 14 is an enlarged sectional view of a portion of the pump body including a main pump body portion and a liquid and air bore similar to that shown in figure 1 1 and showing the liquid flow during the activation stroke;
  • Fig. 15 is a sectional view of the foam dispenser similar to that shown in figure 2 and showing the liquid flow during the return stroke;
  • Fig. 16 is a perspective view of an alternate embodiment of the foam dispenser with an inverted cartridge
  • Fig. 17 is a blown apart perspective view of the foaming assembly of the dispenser of figure 16;
  • Fig. 18 is an enlarged sectional view of the foanning assembly and a portion of the inverted cartridge of the dispenser of figure 16;
  • Fig. 19 is an enlarged sectional view of the foaming assembly and a portion of the inverted cartridge similar to that shown in figure 18 and showing the air and liquid flow during the activation stroke;
  • Fig. 20 is an enlarged sectional view of the foaming assembly and a portion of the inverted cartridge similar to that shown in figure 18 and showing the air and liquid flow during the return stroke;
  • Fig. 21 is a perspective view of another alternate embodiment of the foam dispenser with a pouch
  • Fig. 22 is a blown apart perspective view of the foaming assembly of the dispenser of figure 21 ;
  • Fig. 23 is an enlarged sectional view of the foaming assembly and a portion of the inverted cartridge of the dispenser for figure 21 ;
  • Fig. 24 is an enlarged sectional view of the foaming assembly similar to that shown in figure 23 and showing the air and liquid flow during the activation stroke;
  • Fig. 25 is an enlarged sectional view of the foaming assembly and a portion of the inverted cartridge similar to that shown in figure 23 and showing the air and liquid flow during the return stroke;
  • Fig. 26 is a sectional view of a prior art foaming assembly
  • Fig. 27 is a sectional view of an alternate foaming assembly including a mixing tube and showing the air and liquid flow during the activation stroke;
  • Fig. 28 is a sectional view of the alternate foaming assembly including a mixing tube shown in figure 26 but showing the air and liquid flow during the return stroke;
  • Fig. 29 is a sectional view of a portion of the alternate foaming assembly showing the mixing tube but sectioned 90 degrees from the views shown in figures 26 and 28;
  • Fig. 30 is a sectional view of an alternate embodiment of the foaming assembly during the return stroke, the foaming assembly being similar to that shown in figures 27 to 30 but showing a different path for air into the mixing chamber;
  • Fig. 31 is a sectional view of the foaming assembly of figure 30 during the activation stroke
  • Fig. 32 is a sectional view of the foaming assembly of figure 30 but sectioned 90 degrees therefrom;
  • Fig. 33 is a sectional view of the foaming assembly of figure 31 but sectioned 90 degrees therefrom;
  • Fig. 34 is a sectional view of an alternate prior art foaming assembly
  • Fig. 35 is a sectional view of a modified version of the foaming assembly of figure 34 showing the air flow path and liquid flow path on the return stroke;
  • Fig. 36 is a sectional view similar to that shown in figure 35 but showing the air flow path and liquid flow path on the activation stroke;
  • Fig. 37 is sectional view of the foam dispenser of figures 16 to 21 in a dispenser housing.
  • Fig. 38 is a sectional view of the foam dispenser and housing of figure 37 but showing the return stroke.
  • Dispenser 10 includes a liquid container 12 and a foaming assembly 14.
  • upstream and downstream are determined during an activation stroke and therefore upstream is where the liquid starts in the liquid container 12 and downstream is where it ends and exits the foam dispenser 10 from the exit nozzle 44.
  • the activation stroke is when the pump or piston dome 30 is depressed and the return stroke is when the piston dome or pump returns to its at rest position.
  • the pump has an activation stroke wherein the pump moves from an at rest position to a compressed position and a return stroke wherein the pump moves from the compressed position to an at rest position.
  • the volume of the air chamber and liquid chamber are each substantially smaller in the compressed position.
  • the foaming assembly 14 has an air chamber 16 in flow communication with a mixing zone 19 and a liquid chamber 20 in flow communication with the mixing zone 19.
  • the liquid chamber 20 is in flow communication with the liquid container 12 and has a liquid inlet valve 22.
  • a liquid outlet valve 24 is between the liquid chamber and the mixing zone 19.
  • the foaming assembly 14 includes a main pump body 28 and a piston dome 30.
  • the main pump body 28 includes a liquid and air bore 32 which is a press fit into the main pump body portion 29, as best seen in figure 4.
  • the liquid and air bore 32 of the main pump body 28 and the piston dome together define the liquid chamber 20 and has the liquid inlet valve 22 integrally formed therein which include a body liquid chamber portion 33 and a liquid piston portion 35 as shown on figure 2.
  • the main pump body portion 29 includes a dip tube 34 that extends into the liquid container 12, as shown in figure 2.
  • a tailored valve seat 36 is positioned at one end of the dip tube 34 at the transition to the liquid chamber 20.
  • the liquid inlet valve 22 is seated on the tailored valve seat 36 and biased in the closed position.
  • the liquid inlet valve 22 selectively controls the liquid inlet to the liquid chamber 20 and is responsive to a reduction in the pressure in the liquid chamber.
  • the liquid and air bore 32 and the piston dome 30 define the air chamber 16.
  • An air path 38 is defined by the liquid and air bore 32 and provides an air flow path between the air chamber and the mixing zone 19.
  • the mixing zone 19 in the embodiment shown in figures 1 to 16 is a mixing tube 18.
  • the liquid container is an upright liquid container 12.
  • the liquid and air bore 32 includes an air inlet valve 26 which is a one way valve that allows air to enter into the liquid container 12.
  • the air inlet valve 26 is deflected to bias it closed.
  • the air inlet valve 26 flexes open when the pressure in the bottle reaches a predetermined pressure such that the liquid container will not collapse.
  • a mating cup 40 is formed in the main pump body portion 29 and a seal off feature 42 formed in the air inlet valve 26 is sealingly seated in the mating cup until the pressure in the liquid container 12 is over a predetermined pressure.
  • the main pump body portion 29 has an exit nozzle
  • the liquid outlet valve 24 is press fit into a portion of main pump body portion 29.
  • the liquid outlet valve 24 is positioned at the liquid outlet 46 of the liquid chamber 20.
  • the liquid outlet valve 24 acts similar to an umbrella valve such that as it moves responsive to pressure in the liquid chamber 20 from the rest position as shown in figure 6 to the open position as shown in figure 7.
  • the liquid outlet valve selectively controls the liquid flowing from the liquid chamber 20 into the mixing tube 18.
  • the arrows 48 shows the flow path of the liquid when the liquid outlet valve 24 is in the open position.
  • the mixing tube 18 is press fit into the exit nozzle 44.
  • the mixing tube 18 has a central elongate mixing channel 50.
  • the mixing tube 18 acts as a stop for the liquid outlet valve 24.
  • the liquid outlet 46 is in flow communication with an upstream end of the elongate mixing channel 50 via an inner annular liquid channel 52.
  • the elongate mixing channel is relatively long and narrow forming a channel from the upstream end to the downstream end.
  • Air is ported into the central elongate mixing channel 50 through at least one air port 54 and in the embodiment shown herein through a plurality of air ports 54. In this embodiment there are four air ports 54 equally spaced around the central elongate mixing channel 50.
  • the mixing tube has an annular gap 56 which in situ creates an outer annular air channel 58.
  • Air channels 59 connect the annular air channel 58 and the air ports 54.
  • air flows from the air chamber 16 through the air path 38 in the liquid and air bore 32 into the outer annular air channel 58 into the air channel 59 through the air ports 54 and into the central elongate mixing channel 50.
  • the exit zone expands such that it has a cross sectional area that is larger than the cross sectional area of the elongate mixing channel.
  • the exit zone is a chamfer 60 oriented such that it expands in the downstream direction.
  • the central elongate mixing channel 50 and chamfer 60 together form an elongate venturi tube.
  • air ports 54 are spaced around the central elongate mixing channel. Accordingly in use air is injected from four sides into the stream of liquid passing through the elongate mixing channel.
  • a foam tube 62 with at least one porous member 63 is positioned in the exit nozzle 44 such that the porous member is downstream of the elongate mixing channel 50.
  • a foam tube 62 is press fit downstream of the mixing tube 18.
  • the foam tube is tapered such that the downstream end has a smaller diameter than the upstream end.
  • the foam tube 62 could have a parallel bore.
  • the foam tube may have a porous member 63 attached to one or both ends thereof.
  • the porous member may be mesh, gauze, foam, sponge or other suitable porous material and may be the same gauge or a larger gauge upstream of a smaller gauge. Accordingly the user may tailor their choice of porous member to the type and characteristics of the liquid.
  • the piston dome 30 operably attached to the main pump body whereby it is retained between the main pump body portion 29 and the liquid and air bore 32.
  • the piston dome has a liquid piston portion 35 which sealingly fits inside the liquid chamber 20 and slides up and down in the liquid chamber to change the volume of the liquid chamber 20 responsive to the movement of the piston dome 30.
  • the piston dome 30 is resiliently deformable such that once it has been depressed the profile and material of the piston dome will return to its at rest position without the need for a spring.
  • the liquid and air bore 32 and piston dome 30 together define the air chamber 16 whereby when the piston dome 30 is pushed inwardly the volume of the air chamber 16 is reduced.
  • the foam dispenser 10 also includes a transit cap 66 which is press fit onto the exterior of the exit nozzle 44 as best seen in figures 1 to 3.
  • the transit cap 66 includes a pull tab 68 to aid in the removal when ready to be used.
  • the piston dome 30 In use the piston dome 30 is compressed and air from the air chamber 16 is pushed through the air path 38 into the outer annular air channel 58 through air ports 54 and into the central elongate mixing channel 50 in mixing tube 18 as shown in figure 12.
  • Mixing tube 18 is constructed so that the air from the air chamber 16 is under pressure when it enters the central elongate mixing channel 50 through the air ports 54.
  • the piston dome 30 When the piston dome 30 is released the resiliently deformable dome returns to its original shape and the air chamber is recharged.
  • a sucking action draws air through the mixing tube and back into the air chamber 16, as shown in figure 13. If there is any liquid or foam still in the mixing tube 18 it too will be sucked back into the foaming assembly 14.
  • liquid pressure in the liquid chamber 20 builds up such that liquid outlet valve 24 opens and liquid flows into the central elongate mixing channel 50 of mixing tube 18 as shown in figure 14.
  • the piston dome 30 returns to its original shape in the return stroke the liquid chamber is recharged because a vacuum is created in the liquid chamber 20 and the liquid inlet valve 22 is opened and liquid is sucked into the liquid chamber 20 as shown in figure 15.
  • foam dispenser 10 is constructed from eight pieces namely the piston dome 30, the liquid and air bore 32, the main pump body portion 29, the liquid container 12, the liquid outlet valve 24, the mixing tube 18, the foam tube 62 and the transit cap 66.
  • the main pump body portion 29 and the liquid and air bore 32 have some of the other features integrally formed therein.
  • the air inlet valve 26, the liquid inlet valve 22 and the air path 38 are integrally formed in the liquid and air bore 32.
  • the dip tube 34 is integrally formed in the main pump body portion 29.
  • the piston dome 30 and the liquid and air bore 32 cooperate to form the air chamber 16 and the liquid chamber 20 and they are supported by the main pump body portion 29.
  • the respective volume of the air chamber 16 and liquid chamber 20 is dependent on the position of the piston dome 30.
  • the piston dome 30 moves from an at rest position to a depressed position whereby responsively the volume of the air chamber 16 and the volume of the liquid chamber 20 are both reduced.
  • the piston dome 30 moves from the depressed position back to the at rest position wherein the volume of the air chamber 16 and the liquid chamber 20 are both returned to their maximum volume.
  • FIG. 16 An alternate foam dispenser 70 is shown in figures 16 to 20 wherein the liquid container is an inverted liquid container 72.
  • the foaming assembly 74 is similar to the foaming assembly 14 described above and only those portions of the foaming assembly 74 that are different from foaming assembly 14 will be described in detail.
  • Main pump body portion 76 has a connecting portion 78 which is connectable to the inverted liquid container 72. In the embodiment shown herein connecting portion 78 is connected using a threaded connection, however any leak free connection may be used.
  • the main pump body portion 76 includes a liquid channel 79 which is in flow communication with the liquid chamber 20.
  • the upstream end of the liquid channel 79 includes a valve seat 80.
  • the liquid inlet valve 22 is seated on the valve seat 80 and biased in the closed position.
  • Inverted liquid container 72 is a collapsible container.
  • the foaming assembly 74 need not contain an air inlet and air inlet valve that is in flow communication with the liquid container.
  • foam dispenser 90 is shown in figures 21 to 25 wherein the liquid container is an inverted collapsible liquid pouch 92 with a pouch connector 94 attached thereto.
  • Foam dispenser 90 is similar to both foam dispenser 10 and foam dispenser 70 described above.
  • Foam dispenser 90 includes foaming assembly 95 with a main pump body portion 96 which has a connector portion 98 which connects to pouch connector 94.
  • Connector portion 98 includes a valve seat 100 and the liquid inlet valve 22 is seated on the valve seat 100 and biased in the closed position.
  • Pouch connector 94 has a liquid channel 102 which when the pouch connector 94 is connected to the connector portion 98 of the main pump body portion 96 is in flow communication with liquid chamber 20.
  • the mixing tube 18 or alternate embodiments of the mixing tube may be used in other foam dispensers.
  • Any foam dispenser that has an air chamber, a liquid chamber and a means for pressurizing the air chamber and liquid chamber may be modified to incorporate the mixing tube shown herein.
  • An example of a prior art foam assembly for a dispenser is shown in figure 26 and an embodiment of a mixing tube 1 12 is shown in figures 27 to 29 and an alternate embodiment of a mixing tube 130 is shown in figures 30 to 33.
  • the prior art foam assembly 1 10 shown herein is a foam assembly for a dispenser similar to that shown in US patent 6,082,586.
  • the dispenser includes pump that has an activation stroke wherein the pump moves from an at rest position to a compressed position and a return stroke wherein the pump moves from the compressed position to an at rest position.
  • the volume of the air chamber and liquid chamber are each substantially smaller in the compressed position.
  • the mixing chamber shown in US patent 6,082,586 has been modified to include a mixing tube 1 12.
  • the mixing tube 1 12 is more efficient than the prior art mixing chamber the volume of the air chamber could be reduced while generally maintaining the quality of the foam.
  • Mixing tube 1 12 is similar to mixing tube 18 described above with a central elongate mixing channel 1 14 and air ports 1 16.
  • At the downstream end of the central elongate mixing channel 1 14 there is an exit zone which herein is a chamfer 122.
  • the mixing elongate channel 1 14 and the chamfer 122 together form an elongate venturi tube.
  • the foam dispenser includes a foaming assembly 1 1 1 with an air chamber 1 18 and a liquid chamber 120.
  • the air chamber 1 18 is in flow
  • the liquid chamber 120 is in flow communication with the central elongate mixing channel 1 14 at the upstream end of the elongate mixing channel.
  • An upstream or first 124 and a downstream or second 126 foam tube are in the exit nozzle 128 downstream of the mixing tube 1 12.
  • Each foam tube 124, 126 has a porous member attached thereto.
  • the second foam tube has 126 a second foam tube porous member attached thereto.
  • the upstream porous member has larger holes than the downstream porous member.
  • the inside diameter of the upstream foam tube 124 is generally the same as the downstream end of the chamfer 122. It has been observed that in the configuration shown in figures 27 to 29 there is a risk that after activation the dispenser might drip. Accordingly an exit valve could be added or the volume of the air well below the air ports could be increased.
  • FIG. 30 shows the return stroke and figure 31 shows the activation stroke.
  • figure 32 also shows the return stroke but it is a sectional view 90 degrees the view shown in figure
  • Mixing tube 130 is similarly for use in a modified foam dispenser that is similar to the foam dispenser shown in US patent 6,082,586.
  • Mixing tube 130 is similar to mixing tube 1 12 described above with a central elongate mixing channel 132 and an exit zone which herein is a chamfer 134.
  • the elongate mixing channel 132 and the chamfer 134 together form an elongate venturi tube.
  • the foam dispenser includes a foaming assembly with an air chamber
  • Liquid chamber 120 has an exit valve 136 which controls the flow of the liquid into a mixing chamber 138.
  • Air chamber 1 18 has an outlet port 140 into mixing chamber 138.
  • Mixing chamber 138 is upstream of mixing tube 130.
  • Mixing chamber 138 is in flow communication with the central elongate mixing channel 132 at the upstream end of the mixing tube 130.
  • An upstream 124 and a downstream 126 foam tube are in the exit nozzle 128 downstream of the mixing tube 130.
  • the inside diameter of the upstream foam tube 124 is generally the same as the downstream end of the chamfer 134.
  • the foaming assembly 140 includes an air chamber 142, a liquid chamber 144, a mixing chamber 146 and an exit nozzle 148.
  • This dispenser is described in detail in US patent 5,443,569 issued to Uehira et al. on August 22, 1995.
  • This dispenser includes a pump that has an activation stroke wherein the pump moves from an at rest position to a compressed position and a return stroke wherein the pump moves from the compressed position to an at rest position.
  • the volume of the air chamber and liquid chamber are each substantially smaller in the compressed position.
  • This foam assembly may be modified in a similar fashion as described above. For example it could be modified by inserting a mixing tube similar to those described above.
  • the foaming assembly 151 could be modified as shown in figures 35 and 36.
  • Figure 35 shows the return stroke and figure 36 shows the activation stroke and wherein the dotted lines 158 show the air flow and the sold line 160 shows the flow of the liquid.
  • Foaming assembly 151 is similar to the prior art foaming assembly 140 shown in figure 34 but with a modified mixing chamber and a reduced volume of air in the air chamber.
  • the mixing chamber has a central elongate mixing channel 150 with an exit zone which herein is a chamfer 152 downstream thereof.
  • the volume of the combined central elongate mixing channel 150 and chamfer 152 is approximately one quarter of the volume of the prior art mixing chamber 146.
  • the improved mixing action allows the volume of the air chamber 154 to be reduced as compared to air chamber 142 by about 10 percent.
  • the volumes of the liquid chambers 146 and 156 are similar. It will be appreciated by those skilled in the art that mixing tube described above could be molded separately as a mixing tube and then inserted into the mixing chamber in a foaming assembly or alternatively it could be formed as an integral part of the mixing chamber.
  • the air to liquid volume ratio may be reduced from the prior art shown herein and thus more liquid per shot may be dispensed while maintaining the same packaging or dispenser size whilst also providing a commercially acceptable foam quality.
  • the ratio of the volume of liquid to air may be between 1 :2 and 1 :12 or in specific applications it may be 1 :8 and 1 :9.
  • foam dispensers shown herein may be used in association with a dispenser housing wherein the dispenser housing includes a push bar assembly that engages the piston dome by moving the push bar assembly enables the activation stroke of the piston dome.
  • the push bar may be activated manually or automatically wherein a motion sensor is operatively connected to the push bar assembly such that motion within a predetermined range of the motion sensor will activate the push bar assembly.
  • FIG 37 and 38 show a dispenser housing 170 used in conjunction with the foam dispenser 70 shown in figures 16 to 20 and wherein figure 37 shows the push bar 172 in the at rest position ready for the activation stroke and figure 38 shows the push bar 172 pushing against the piston dome 30 and in the return stroke. It will be appreciated by those skilled in the art that the other embodiments could similarly be housed in a dispenser housing.
  • Dispenser housing 170 includes a push bar 172 which pushes against the piston dome 30 of foam assembly 74.
  • Dispenser housing 170 includes a back portion 174 and a front portion 176.
  • Back portion 174 will typically be attached to a wall.
  • Front portion 176 is attachable to back portion 174.
  • Push bar 172 is hingeably attached to front portion 176.
  • the embodiments of the foam dispensers described herein may be used with foamable liquid and in particular soaps, creams or other lotions that are capable of being foamed. Alternatively it may be used with a foamable alcohol.
  • the systems described herein are directed to foam dispensers and improved insert.
  • embodiments of the foam dispenser and improved insert are disclosed herein.
  • the disclosed embodiments are merely exemplary, and it should be understood that the foam dispenser and improved insert may be embodied in many various and alternative forms.
  • the Figures are not to scale and some features may be exaggerated or minimized to show details of particular elements while related elements may have been eliminated to prevent obscuring novel aspects. Therefore, specific structural and functional details disclosed herein are not to be interpreted as limiting but merely as a basis for the claims and as a representative basis for teaching one skilled in the art to variously employ the foam dispenser and improved mixing chamber.
  • the illustrated embodiments are directed to foam dispensers.
  • the terms “comprises” and “comprising” are to be construed as being inclusive and opened rather than exclusive. Specifically, when used in this specification including the claims, the terms "comprises" and

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Dispersion Chemistry (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Closures For Containers (AREA)
  • Nozzles (AREA)
PCT/EP2013/056901 2012-04-27 2013-04-02 A foam dispenser Ceased WO2013160071A1 (en)

Priority Applications (15)

Application Number Priority Date Filing Date Title
MX2016005431A MX387249B (es) 2012-04-27 2013-04-02 Un dispensador de espuma.
BR122016006992-3A BR122016006992B1 (pt) 2012-04-27 2013-04-02 tubo de mistura, e, conjunto para espuma
BR112014026714-6A BR112014026714B1 (pt) 2012-04-27 2013-04-02 Conjunto para espuma, e dispensador de espuma
SG11201406944VA SG11201406944VA (en) 2012-04-27 2013-04-02 A foam dispenser
JP2015507446A JP6077644B2 (ja) 2012-04-27 2013-04-02 泡吐出容器
MX2014013058A MX342382B (es) 2012-04-27 2013-04-02 Un dispensador de espuma.
CA2870575A CA2870575C (en) 2012-04-27 2013-04-02 A foam dispenser
EP13713448.2A EP2855029B1 (en) 2012-04-27 2013-04-02 A foam dispenser
CN201380022284.8A CN104321148B (zh) 2012-04-27 2013-04-02 泡沫分配器
IN2334MUN2014 IN2014MN02334A (enExample) 2012-04-27 2013-04-02
US14/383,388 US9073066B2 (en) 2012-04-27 2013-04-02 Foam dispenser
NZ629340A NZ629340A (en) 2012-04-27 2013-04-02 A foam dispenser
AU2013203276A AU2013203276B2 (en) 2012-04-27 2013-04-02 A foam dispenser
HK15103144.2A HK1202483B (en) 2012-04-27 2013-04-02 A foam dispenser
PH12014502411A PH12014502411A1 (en) 2012-04-27 2014-10-27 A foam dispenser

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US13/458,318 2012-04-27
US13/458,318 US8814005B2 (en) 2012-04-27 2012-04-27 Foam dispenser

Publications (1)

Publication Number Publication Date
WO2013160071A1 true WO2013160071A1 (en) 2013-10-31

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ID=48044802

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PCT/EP2013/056901 Ceased WO2013160071A1 (en) 2012-04-27 2013-04-02 A foam dispenser

Country Status (14)

Country Link
US (2) US8814005B2 (enExample)
EP (1) EP2855029B1 (enExample)
JP (1) JP6077644B2 (enExample)
CN (2) CN104321148B (enExample)
AU (2) AU2013203276B2 (enExample)
BR (2) BR112014026714B1 (enExample)
CA (1) CA2870575C (enExample)
IN (1) IN2014MN02334A (enExample)
MX (2) MX387249B (enExample)
NZ (1) NZ629340A (enExample)
PH (1) PH12014502411A1 (enExample)
PL (1) PL2855029T3 (enExample)
SG (1) SG11201406944VA (enExample)
WO (1) WO2013160071A1 (enExample)

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