Guided piston for internal combustion engine
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United States of America Patent
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May 11, 1999
Grant Date -
N/A
app pub date -
Nov 11, 1997
filing date -
Nov 11, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A guide ring for a piston comprises a split ring member having end edges which can be spread apart to slip the guide over the piston head and into a circumferential groove on an outer surface of a skirt portion of the piston head with the portions of the guide ring located in the pin bore area, including the end edges, being flattened. The guide ring is axially elongated and overlaps the piston pin bores. The guide ring is formed of low friction polyimide material which is firm yet flexible, compressible, and returns to its preformed configuration when the end edges are released.
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