Sequentially activated multi-diaphragm foam pumps, refill units and dispenser systems
First Claim
1. A foam dispenser comprising:
- a housing;
a container for holding foamable liquid;
a foam pump in fluid communication with the container wherein the foam pump includes;
a pump housing;
a diaphragm assembly;
the diaphragm assembly havinga liquid pump diaphragm in fluid communication with the container;
a plurality of air pump diaphragms; and
an outlet valve;
a mixing chamber for mixing foamable liquid from the liquid pump diaphragm with air from the plurality of air pump diaphragms;
a foam cartridge in fluid communication with the mixing chamber;
an outlet for dispensing foam wherein the outlet is in fluid communication with the foam cartridge; and
an actuation mechanism to sequentially activate the liquid pump diaphragm and the plurality of air pump diaphragms.
4 Assignments
0 Petitions
Accused Products
Abstract
An exemplary foam dispenser includes a housing, a container for holding foamable liquid and a foam pump in fluid communication with the container. The foam pump has a plurality of diaphragm pumping chambers wherein at least one diaphragm pumping chamber pumps liquid, and at least two diaphragm pumping chambers pump air. The foam pump includes a liquid outlet valve having a cracking pressure of at least about 5 pounds per square inch; and two or more air outlet valves having cracking pressure of less than about 5 pounds per square inch. A mixing chamber is located downstream of the plurality of diaphragm pumping chambers for mixing liquid and air to form a foamy mixture. A foam cartridge located downstream of the mixing chamber and an outlet is provided for dispensing foam.
121 Citations
19 Claims
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1. A foam dispenser comprising:
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a housing; a container for holding foamable liquid; a foam pump in fluid communication with the container wherein the foam pump includes; a pump housing; a diaphragm assembly; the diaphragm assembly having a liquid pump diaphragm in fluid communication with the container; a plurality of air pump diaphragms; and an outlet valve; a mixing chamber for mixing foamable liquid from the liquid pump diaphragm with air from the plurality of air pump diaphragms; a foam cartridge in fluid communication with the mixing chamber; an outlet for dispensing foam wherein the outlet is in fluid communication with the foam cartridge; and an actuation mechanism to sequentially activate the liquid pump diaphragm and the plurality of air pump diaphragms. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A foam dispenser comprising:
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a housing; a container for holding foamable liquid; a foam pump in fluid communication with the container; the foam pump having a plurality of diaphragm pumping chambers wherein at least one diaphragm pumping chamber pumps liquid, and at least two diaphragm pumping chambers pump air; a liquid outlet valve having a cracking pressure of at least about 5 pounds per square inch; two or more air outlet valves having cracking pressure of less than about 5 pounds per square inch; a mixing chamber located downstream of the plurality of diaphragm pumping chambers for mixing liquid and air to form a foamy mixture; a foam cartridge located downstream of the mixing chamber; and an outlet for dispensing foam. - View Dependent Claims (10, 11)
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12. A foam dispenser comprising:
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a housing; a container for holding foamable liquid; a foam pump in fluid communication with the container wherein the foam pump includes; a pump housing; a diaphragm assembly; the diaphragm assembly having a liquid pump diaphragm in fluid communication with the container; a plurality of air pump diaphragms; and a cylindrical outlet valve; wherein the cylindrical outlet valve is in fluid communication with the liquid pump diaphragm and the plurality of air pump diaphragms; a mixing chamber for mixing foamable liquid from the liquid pump diaphragm with air from the plurality of air pump diaphragms; a foam cartridge in fluid communication with the mixing chamber; and an outlet for dispensing foam wherein the outlet is in fluid communication with the foam cartridge. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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Specification