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.
申请公布号
US5111736(A)
申请公布日期
1992.05.12
申请号
US19890455579
申请日期
1989.12.20
申请人
BUCHBERGER, ANTON H.;TREMOULET, JR., OLIVIER L.;MORDRE, SIGURD C.
发明人
BUCHBERGER, ANTON H.;TREMOULET, JR., OLIVIER L.;MORDRE, SIGURD C.