Method for manufacturing a compression ring
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United States of America Patent
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-
Sep 7, 1993
Grant Date -
N/A
app pub date -
Jun 22, 1992
filing date -
Jun 27, 1991
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A compression ring provided with both ends having notches is formed on outer peripheral surface with a plasma nitrided layer and is formed on upper and lower surfaces and an inner peripheral surface with soft surface treatment layers. The upper and lower surfaces and the inner peripheral surface may be of base material surfaces.
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