Manually operated pump device for dispensing fluids
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United States of America Patent
Stats
-
Jun 29, 1993
Grant Date -
N/A
app pub date -
Apr 19, 1991
filing date -
Nov 6, 1990
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A manually operated pump device for dispensing fluids from containers is disclosed. The pump device is provided with a mobile cylinder, a trigger lever for operating the cylinder, and a fixed piston located inside the cylinder. In the pump device, there is also a gasket and a stem-like member located inside a delivery and suction valve. The gasket and stem-like member act together to permit fluid to flow from the cylinder and to a delivery head during a delivery stage. During a sealing stage, the gasket and stem-like member operate in conjunction to seal the cylinder. A spring acts between the cylinder and the piston to allow fluid to flow again through the delivery valve.
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