Piston top chamfer design to reduce noise and friction

Details Piston top chamfer design to reduce noise and friction Piston top chamfer design to reduce noise and friction

2006-12-21

2009-11-10

Lopez, F. Daniel (Department: 3745)

Expansible chamber devices

With lubricating means

Piston has lubricant retaining or conducting means

Reexamination Certificate

active

07614339

ABSTRACT:
Disclosed is a piston having a top chamfer functioning as an oil reservoir, the top chamfer designed to reduce piston noise and friction. The top chamfer partially defines a tapered volume or cavity configured to enhance oil flow to the middle portions of the piston skirt so as to increase lubrication during piston up stroke and thereby reduce piston noise and friction.

REFERENCES:
patent: 1760122 (1930-05-01), Drevitson
patent: 6862976 (2005-03-01), Gaiser et al.
patent: 2001-336447 (2001-12-01), None
patent: 2002-174141 (2002-06-01), None
patent: 2004-353545 (2004-12-01), None

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