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
• • 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
  • 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
  • B05B11/1074—Springs located outside pump chambers
• • 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

Definitions

• the invention relates to a foam forming unit particularly suitable for a liquid container, comprising a pump for air and a pump for liquid, which are each provided with an inlet and an outlet, said foam forming unit further comprising a mixing chamber which is in communication with the outlet of each pump, a dispensing part provided with an outflow channel with a foam opening, the channel being in communication with the mixing chamber, and valves in respectively the inlet and the outlet of each pump for drawing in respectively delivering air and liquid.
• Such a foam forming unit is known from the international patent application WO 97/13585. Although this foam forming unit can generate a good foam, i.e. a foam of correct texture, this known foam forming unit consists of a large number of construction components manufactured from different materials. The cost of manufacturing such a foam forming unit is therefore relatively high.
• the object of the present invention is to improve the foam forming unit known from the prior art .
• the foam forming unit is characterized according to the invention in that one or more valves are formed integrally with the air pump or liquid pump into a single construction element. By combining functions the number of construction components can in this way be reduced, which results in lower manufacturing costs.
• each pump comprises a pressure chamber with a piston displaceable relative to the pressure chamber. Pressure is built up in the chamber of the pump by displacing the piston.
• the outlet valve of the liquid pump is formed integrally with the piston of the liquid pump, thereby further reducing the number of construction components .
• the foam forming unit according to the invention further comprises
• Figure 1 shows a perspective, cross-sectional view of a foam dispensing assembly according to the invention
• Figure 2 shows a cross-section of the foam dispensing assembly of Figure 1 in a first extreme position
• Figure 3 shows a cross-section of the foam dispensing assembly of Figure 1 in a second extreme position
• Figure 4 shows a cross-section of another embodiment of a foam forming unit according to the invention.
• the same reference numerals are used in each of the Figures for the same construction components.
• a foam dispensing assembly consisting of a liquid container 1 and a foam forming unit 2.
• the foam forming unit 2 comprises a pump 3 for air and a pump 4 for liquid which are each provided with an inlet and an outlet.
• the inlet of air pump 3 is in communication with the environment, while the inlet of liquid pump 4 is in communication with the content of liquid container 1.
• Foam forming unit 2 further comprises a mixing chamber 5 which is in communication with the outlet of both air pump 3 and liquid pump 4.
• a dispensing part 6 On the top part of the assembly is situated a dispensing part 6 which is provided with an outflow channel 7 with a foam opening 8.
• Outflow channel 7 runs from mixing chamber 5 to foam opening 8.
• One or more foam forming elements are normally located in this channel 7.
• valve 12 in the inlet of liquid pump 4 is otherwise shown in Figures 2 and 3.
• Liquid pump 4 comprises a pressure chamber 13 with a piston 14 which is displaceable relative to pressure chamber 13. It is otherwise noted that the term “piston” is understood to mean that part of the pump which is moved (compare Figure 2 and Figure 4) .
• Pressure chamber 13 is further located between inlet valve 12, outlet valve 11 and piston 14 of liquid pump 4.
• air pump 3 comprises a pressure chamber 15 with a piston 16 which is displaceable relative to pressure chamber 15.
• Pressure chamber 15 of air pump 3 is bounded on one side by inlet valve 10 and outlet valve 9 and on the other side between pistons 14,16 of the two pumps 3,4, these pistons being placed concentrically relative to each other.
• An operating member for operating the two pumps 3,4 is manufactured integrally with piston 16 of air pump 3.
• the operating member 16, or the piston 16 of air pump 3 is arranged slidably in a holder element 17 which holds the foam forming unit 2 in liquid container 1. Upon displacement of operating member 16, this movement is transmitted directly onto piston 16 to operate air pump 3.
• a coupling element 18 is arranged between operating member 16 and the piston 14 of liquid pump 4, which coupling element transmits the displacement of operating member 16 to piston 14 of liquid pump 4.
• dispensing part 6 is in fact formed integrally with operating member 16, or the piston 16 of air pump 3.
• FIG. 1 shows clearly that the valves 9,10,11 are formed by membranes of a predetermined thickness formed on construction elements 14. At a wall thickness of construction elements 14 and 18 of about 1 mm, the thickness of the cylindrical membranes is for instance 0.2 mm. Valves 9,10,11 are injected moulded from plastic simultaneously with air pump 3 or liquid pump 4 to form a single construction element 14,18.
• the coupling element 18 is deemed a part of air pump 3.
• Coupling element 18 has on the side directed toward dispensing part 6 an extension 27 with two circular seats 28, 29 of different diameter. In these seats are placed one or more foam forming elements, for instance in the form of fine- mesh screens (not shown) .
• the foam forming element is likewise located in the extension 27 of coupling element 18, but is in this case formed by a wall with holes 30 which are co-moulded during the injection moulding of coupling element 18.
• the present invention is of course not limited to the preferred embodiments shown in the drawings.
• the pumps 3,4 are shown as concentric, it is also possible to provide them eccentrically or adjacently of each other.
• An example of such a construction is to be found in the international patent application WO 99/54054.
• the inlet valve 12 for liquid pump 4 is a membrane formed on piston 14 or holder element 18, wherein a liquid lock will have to be provided in another manner.
• a simplified foam forming unit with a relatively small number of construction components.

Landscapes

• Closures For Containers (AREA)
• Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
• Absorbent Articles And Supports Therefor (AREA)
• Separation By Low-Temperature Treatments (AREA)
• Reciprocating Pumps (AREA)
• Insulated Conductors (AREA)
• Superconductors And Manufacturing Methods Therefor (AREA)
• Liquid Developers In Electrophotography (AREA)
• Glass Compositions (AREA)

Priority Applications (13)

Applications Claiming Priority (2)

Publications (1)

Family

ID=19772452

Family Applications (1)

Country Status (18)

Cited By (4)

Families Citing this family (40)

Citations (2)

Family Cites Families (11)

• 2000
  • 2000-11-23 NL NL1016694A patent/NL1016694C2/nl not_active IP Right Cessation
• 2001
  • 2001-11-23 EP EP01997360A patent/EP1343593B1/en not_active Expired - Lifetime
  • 2001-11-23 AU AU2279802A patent/AU2279802A/xx active Pending
  • 2001-11-23 CA CA2429685A patent/CA2429685C/en not_active Expired - Fee Related
  • 2001-11-23 AU AU2002222798A patent/AU2002222798B2/en not_active Ceased
  • 2001-11-23 PT PT01997360T patent/PT1343593E/pt unknown
  • 2001-11-23 DE DE60124002T patent/DE60124002T2/de not_active Expired - Lifetime
  • 2001-11-23 WO PCT/NL2001/000852 patent/WO2002042005A1/en not_active Ceased
  • 2001-11-23 JP JP2002544174A patent/JP3999658B2/ja not_active Expired - Fee Related
  • 2001-11-23 BR BRPI0115603-9A patent/BR0115603B1/pt not_active IP Right Cessation
  • 2001-11-23 ES ES01997360T patent/ES2272574T3/es not_active Expired - Lifetime
  • 2001-11-23 RU RU2003118438/12A patent/RU2281811C2/ru not_active IP Right Cessation
  • 2001-11-23 DK DK01997360T patent/DK1343593T3/da active
  • 2001-11-23 CN CNB018214134A patent/CN1263551C/zh not_active Expired - Lifetime
  • 2001-11-23 AT AT01997360T patent/ATE342775T1/de active
  • 2001-11-23 US US10/432,479 patent/US7147133B2/en not_active Expired - Lifetime
  • 2001-11-23 MX MXPA03004585A patent/MXPA03004585A/es active IP Right Grant
  • 2001-11-23 KR KR1020037006967A patent/KR100886335B1/ko not_active Expired - Fee Related
• 2006
  • 2006-11-13 CY CY20061101636T patent/CY1106265T1/el unknown

Patent Citations (2)

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