PISTON RING
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United States of America Patent
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-
N/A
Issued Date -
Mar 21, 2002
app pub date -
Dec 6, 1999
filing date -
Dec 8, 1998
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
The outer circumferential surface of a second ring is comprised of an outer circumferential surface with a taper face having an outer diameter that increases towards the downward direction, and an outer circumferential surface having the same outer diameter and extending slightly in a perpendicular direction from the lower edge of the taper-faced outer circumferential surface. An annular groove is formed near the outer circumference on a lower surface of the second ring. The annular groove is formed along the entire circumference of the ring and is open at end surfaces of the ring. The annular groove is open to a space between the third land of a piston and the inner circumferential surface of a cylinder.
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