Piston with pin bore lubrication features

Details Piston with pin bore lubrication features Piston with pin bore lubrication features

2008-01-25

2010-12-07

Lazo, Thomas E (Department: 3745)

Expansible chamber devices

Piston

With separable means for pivotally mounting connecting rod...

C092S153000

Reexamination Certificate

active

07845269

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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