Fluid dispensing unit with one-way valve outflow
OwnerShlomo Haviv, Michael Hamiltoninventors
Life of this patent
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Abstract
A fluid dispensing unit includes a hollow support with a reservoir or container located within the support. The container has a one-way valve at its outlet for dispensing fluid while preventing any flow of contaminants back into the container. As fluid is dispensed, the container can be collapsed to assure complete evacuation of the fluid.
Claims18
A fluid dispensing unit, comprising means for forming a closed collapsible container for fluid to be dispensed with the container adapted to be free of gas when initially completely filled with fluid, said container having an outlet, valve means connected to the outlet of said container for dispensing fluid out of the container and preventing any backflow into the container, means for applying pressure to the closed container for displacing the fluid out of the container, and means for collapsing the container as fluid is dispensed for substantially completely emptying the container, a rigid support at least laterally encloses said container, said support has an opening for admitting atmopsheric pressure into contact with at leastone of said container and said means for collapsing said container so that the atmospheric pressure and said means for collapsing the container effect the collpase of the container as fluid is dispensed from the container.
The fluid dispensing unit, as set forth in claim 17, wherein a rod is located within said container from said container outlet to an opposite end of said container, and said piston is an annular piston encircling said rod and located adjacent the opposite end of said container when the container is filled and is displaceable along said rod toward said container outlet.
Dependencies are inferred from the claim text.