Piston with pin bore lubrication features
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United States of America Patent
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Dec 7, 2010
Issued Date -
N/A
app pub date -
Jan 25, 2008
filing date -
Apr 10, 2007
priority date (Note) -
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Abstract
A piston has a piston body with a pair of pin bosses having pin bores aligned along a central axis. The pin bores have bearing surfaces, wherein at least one recess extends axially across at least one of the bearing surfaces. A groove extends partially about the bearing surface circumference and is arranged in fluid communication with the recess. The recess and groove provide a lubrication feature to the pin bore, while the bearing surface has an uninterrupted portion for enhanced load carrying capacity.
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