Vented static seal assembly

Expansible chamber devices – With guide or seal on cylinder end portion for piston or... – Non-metallic seal means between piston or member and end...

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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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patent: 3338136 (1967-08-01), Jerome et al.
patent: 4211151 (1980-07-01), Wallischeck
patent: 4312264 (1982-01-01), Nunnemacher et al.
patent: 4384511 (1983-05-01), Mefferd
patent: 4594938 (1986-06-01), Shore
patent: 4703937 (1987-11-01), Chrzanowski

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