Pneumatic plunger-type valve

Details Pneumatic plunger-type valve Pneumatic plunger-type valve

1984-05-30

1985-11-19

Schwadron, Martin P.

Valves and valve actuation

Reciprocating valve

Particular head and seat cooperation

251364, F16K 142

Patent

active

045537364

ABSTRACT:
A valve device providing control of fluid pressure flow between a supply chamber and a delivery chamber by a movable plunger which forms a seal between the chambers when seated against a stationary supply valve seat and which establishes flow of fluid pressure between the chambers when unseated from the supply valve seat. A mechanical stop is provided on the supply valve seat to limit travel of the plunger beyond a predetermined point when the supply valve is seated against the supply valve seat. Thus, the exhaust valve on the plunger is prevented from traveling far enough to seal against the exhaust valve seat, thereby also preventing the supply valve from cutting into the supply valve and the possibility of inadvertently trapping pressure in the delivery chamber.

REFERENCES:
patent: 802490 (1905-10-01), Bashlin
patent: 2350905 (1944-06-01), Koehler
patent: 2995057 (1961-08-01), Nenzell
patent: 3126028 (1964-03-01), Kurfiss
patent: 3136220 (1964-06-01), Kamm
patent: 3318577 (1967-05-01), Banks
patent: 3438391 (1969-04-01), Yocum
patent: 4228987 (1980-10-01), Potter

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