Shut-off valve for sprayer
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United States of America Patent
Stats
-
Jun 12, 1990
Grant Date -
N/A
app pub date -
Jul 18, 1988
filing date -
Jul 18, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The present invention relates to a valve with a reciprocating piston between two oppositely-acting fluid balance chambers. The static and dynamic pressures of the fluid being dispensed creates a force in each balance chamber. However, these force vectors are of equal magnitude but opposite direction thereby resulting in no net force on the piston. This allows for the elimination of a spring compensating for fluid pressures on the piston. An internal flow passage is used within the piston so as to simplify the design and increase reliability.
First Claim
Family
International Classification(s)
Cited Art Landscape
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