Rick L Frame

US Patent:

57133247, Feb 3, 1998

Filed:

Apr 19, 1996

Appl. No.:

8/636769

Inventors:

Rick L. Frame - Lynn IN
Paul D. Macy - Brownsville IN
Mark M. Shuster - Toledo OH

Assignee:

Dana Corporation - Toledo OH

International Classification:

F16J 926
F02F 500

US Classification:

1231936

Abstract:

A system for preventing microwelding of a piston ring installed in a circumferential groove of a piston, wherein the ring has at least one piston groove engaging surface which is coated with thermal set resin, polytetrafluoroethylene and molydisulfide. This composition provides critical lubrication during the piston and piston ring break-in period and prevents localized high pressure, and high temperature areas which promote microwelding.