HORIZONTAL PUMPS, REFILL UNITS AND FOAM DISPENSERS WITH INTEGRAL AIR COMPRESSORS
First Claim
1. A disposable refill unit for a foam dispenser that has an integral air compressor comprising;
- a container;
a liquid pump secured to the container;
the liquid pump having a liquid chamber defined at least in part by a liquid inlet valve and a liquid outlet valve;
a liquid piston that reciprocates horizontally in the liquid chamber;
a mixing chamber located downstream of the liquid chamber;
an air inlet in fluid communication with the mixing chamber;
a sanitary seal located proximate the air inlet, the sanitary seal allows air to enter the mixing chamber and prevents liquid from exiting the mixing chamber through the air inlet.
2 Assignments
0 Petitions
Accused Products
Abstract
Foam dispensers having integral air compressors with connectors to connect with a disposable refill unit, disposable refill units and liquid pumps are disclosed herein. A refill unit includes a container and a liquid pump. The liquid pump includes a liquid chamber defined at least in part by a liquid inlet valve and a liquid outlet valve. A piston that reciprocates horizontally in the liquid chamber. A mixing chamber is located downstream of the liquid chamber. The mixing chamber is in fluid communication with the liquid chamber and has an air inlet. A sanitary seal is located proximate the air inlet to prevent liquid from contaminating the air compressors.
31 Citations
20 Claims
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1. A disposable refill unit for a foam dispenser that has an integral air compressor comprising;
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a container; a liquid pump secured to the container; the liquid pump having a liquid chamber defined at least in part by a liquid inlet valve and a liquid outlet valve; a liquid piston that reciprocates horizontally in the liquid chamber; a mixing chamber located downstream of the liquid chamber; an air inlet in fluid communication with the mixing chamber; a sanitary seal located proximate the air inlet, the sanitary seal allows air to enter the mixing chamber and prevents liquid from exiting the mixing chamber through the air inlet. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A disposable refill unit for a foam dispenser that has an integral air compressor comprising;
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a container; a liquid pump secured to the container; the liquid pump having a liquid chamber defined at least in part by a liquid inlet valve and a liquid outlet valve; a mixing chamber located downstream of the liquid chamber; an air inlet in fluid communication with the mixing chamber; a sanitary seal located proximate the air inlet, the sanitary seal allows air to enter the mixing chamber and prevents liquid from exiting the mixing chamber through the air inlet; wherein the container, the liquid pump and the sanitary seal are disposable. - View Dependent Claims (12, 13, 14, 15, 16)
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17. A disposable refill unit comprising:
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a container of foamable liquid; a pump secured to the container; the pump having a pump housing; an aperture through an upper surface of the pump housing; a liquid inlet valve; the liquid inlet valve including a stem portion; the stem portion having a projection member; the liquid inlet valve including a sealing member; a pump chamber located within the pump housing, wherein the aperture extends from the upper surface of the pump housing to the pump chamber; wherein the projection member of the liquid inlet valve stem is located at least partially within the pump chamber and the sealing member of the liquid inlet valve is located above the upper surface of the pump housing; and one or more liquid inlet passages located in the housing between the upper surface and the pump chamber; wherein the sealing member is located upstream of the one or more liquid inlet passages.
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18. A disposable refill unit for a foam dispenser that has an integral air compressor comprising;
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a container for holding a foamable liquid; a liquid pump secured to the container; the liquid pump having a liquid chamber defined at least in part by a liquid inlet valve and a liquid outlet valve; a sleeve located at least partially within the liquid chamber; a liquid piston that reciprocates horizontally in the liquid chamber and in contact with the sleeve; a mixing chamber located downstream of the liquid chamber; an air inlet in fluid communication with the mixing chamber; wherein the center of the liquid outlet valve is off-set from the center of the liquid inlet valve. - View Dependent Claims (19, 20)
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Specification