Combined compression and oil scraper piston ring
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Oct 29, 2002
Grant Date -
N/A
app pub date -
Sep 15, 2000
filing date -
Sep 16, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A piston ring includes a first radial flank; a second radial flank; and an outer rounded circumferential surface constituting a contact face of the piston ring. The rounded face has a circumferential crest line situated at a distance from the first radial flank which is more than one half of the axial piston ring height. The piston ring further has facing end surfaces defining a ring gap; and a circumferential groove provided in the outer rounded circumferential surface and extending axially from the second radial flank to the crest. The circumferential groove terminates adjacent each end surface at a distance therefrom.
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