Gas nitrided taper faced keystone piston ring incorporating a sealing land and orientation groove
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United States of America Patent
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May 11, 1999
Grant Date -
N/A
app pub date -
Oct 30, 1996
filing date -
Oct 30, 1996
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A piston ring having a keystone shape and an orientation feature on one of its surfaces for ensuring proper orientation of the ring during installation. The piston ring preferably has an outer peripheral surface that includes a sealing land with a nitride hardened surface to resist wear during the service life of the piston ring. A tapered surface is also provided on the outer peripheral surface adjacent to the sealing land.
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