Pump for dispensing liquid from a container
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United States of America Patent
Stats
-
Aug 19, 1986
Grant Date -
N/A
app pub date -
Apr 16, 1984
filing date -
Apr 16, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A pump for dispensing liquid from a container is disclosed and comprised a cylinder, and a piston having an interior chamber with a valve member disposed therein, the valve member having a cylindrical surface at one end portion thereof. An inlet valve is provided and includes a sleeve having a cylindrical surface having a diameter sized to frictionally engage, provide a liquid seal and slide with respect to the cylindrical surface of the valve member. The inlet valve sleeve seats upon an annular ring extending around the inlet opening of the cylinder and seals the interior chamber of the pump with respect to the container. In accordance with an aspect of the invention, the pump may be non-venting such that a vacuum builds in the container as liquid is dispensed, and a sealing collar is provided to seal the pump with respect to the container.
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