Shawn W O'Connell

US Patent:

20060220322, Oct 5, 2006

Filed:

Apr 4, 2005

Appl. No.:

11/098364

Inventors:

Harold McCormick - Ballwin MO, US
Shawn O'Connell - Irvine CA, US

International Classification:

F16J 9/26

US Classification:

277442000

Abstract:

A method is provided for replenishing lubricant to a piston ring groove to prevent microwelding between a piston and a piston ring from an engine. The method includes forming a plurality replenishment pockets on at least one surface of the ring; and disposing a lubricant (such as a dry-film) on the at least one side of the ring so that the plurality of replenishment pockets are substantially filled with lubricant and such that a layer of lubricant is applied to the at least one surface of the ring. During operation of the engine, the lubricant disposed in the plurality of replenishment pockets migrates onto the at least one surface of the ring and is deposited thereto to inhibit microwelding between the at least one surface of the ring and at least one of the upper and lower groove surfaces of the respective piston ring groove. The lubricant is preferred to be a dry-film lubricant.