Pumps with vents to vent inverted containers and refill units having non-collapsing containers
First Claim
Patent Images
1. A refill unit comprising:
- a non-collapsing container;
a foam pump;
the foam pump having a compressible air chamber;
a passage between the interior of the compressible air chamber and the interior of the container; and
a regulating valve regulating flow from the interior of the compressible air chamber to the interior of the container;
wherein pressure in the compressible air chamber causes the regulating valve to prevent air from passing from the interior of the compressible air chamber to the interior of the container.
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Accused Products
Abstract
Exemplary embodiments of refill units having foam pumps and non-collapsing containers are disclosed herein. In some exemplary embodiments, the refill unit includes a non-collapsing container and a foam pump. The foam pump includes a compressible air chamber. The foam pump includes a passage between the interior of the compressible air chamber and the interior of the container. A regulating valve regulates flow of air from the interior of the compressible air chamber to the interior of the container.
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Citations
19 Claims
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1. A refill unit comprising:
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a non-collapsing container; a foam pump; the foam pump having a compressible air chamber; a passage between the interior of the compressible air chamber and the interior of the container; and a regulating valve regulating flow from the interior of the compressible air chamber to the interior of the container; wherein pressure in the compressible air chamber causes the regulating valve to prevent air from passing from the interior of the compressible air chamber to the interior of the container. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A refill unit comprising:
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a non-collapsing container; a foam pump; the foam pump having a compressible air chamber; a passage between the interior of the compressible air chamber and an interior of the container; and a movable valve secured to the passage, the movable valve having a first position that prevents pressurized air from flowing from the air chamber into the interior of the container and a second position that allows vacuum pressure in the interior of the container to draw air from the interior of the compressible air chamber to the interior of the container. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. A refill unit comprising:
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a non-collapsing container; a foam pump; the foam pump having a compressible air chamber; a passage between the interior of the compressible air chamber and an interior of the container; and a valve secured to the passage, the valve having a wiper seal located within the interior of the container and a second seal located at least partially within the compressible air chamber. - View Dependent Claims (18, 19)
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Specification