Expansible chamber devices – With guide or seal on cylinder end portion for piston or... – Non-metallic seal means between piston or member and end...
Patent
1989-12-20
1992-05-12
Look, Edward K.
Expansible chamber devices
With guide or seal on cylinder end portion for piston or...
Non-metallic seal means between piston or member and end...
277 27, 277188R, F15J 1518
Patent
active
051117363
ABSTRACT:
A seal assembly for a high pressure pump where there is an O-ring positioned in a seal groove having side seal surfaces and a back seal surface, with said O-ring being exposed alternately to high and low pressures in the pumping chamber. A pressure relief passageway is provided to the O-ring at a side surface portion thereof to provide pressure relief at the back side of the O-ring and thus alleviate unwanted fluid accumulation behind the O-ring, thus extending the longevity of the O-ring.
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Buchberger Anton H.
Mordre Sigurd C.
Tremoulet, Jr. Olivier L.
Look Edward K.
Ryznic John
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