High-pressure seal in piston
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United States of America Patent
Stats
-
Aug 31, 1982
Grant Date -
N/A
app pub date -
Mar 18, 1981
filing date -
Mar 18, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A high-pressure seal having a dynamic seal ring and a static seal ring supported by a backup ring is improved upon such that support ring is a one-piece construction having sealing chambers respectively defined together with the bore wall of the cylinder with the piston recess for the dynamic and static seal rings. The seal chamber for the static seal ring is formed to induce a stretching of this ring when the high-pressure seal is assembled in place, whereby the seal between the piston and cylinder is improved as the static seal ring is stretched to provide a tight seal between the backup ring and the piston.
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