Patent ID: 6871622
Filing Date: 2005-03-29
Classification: F01L,Y10T

Abstract:
1. An assembly, comprising: a) socket provided with an outer socket surface that is generally cylindrical in shape, a first socket surface, and a second socket surface, wherein the outer socket surface is configured to cooperate with the inner surface of an engine workpiece, the first socket surface includes a push rod cooperating surface, and the second socket surface includes a plunger reservoir passage configured to conduct fluid and a curved socket surface that is concentric relative to the outer socket surface and configured to cooperate with a leakdown plunger; b) the leakdown plunger is provided with a first plunger opening, a second plunger opening, and an outer plunger surface enclosing an inner plunger surface, wherein the first plunger opening is provided with an annular plunger surface defining a plunger hole shaped to accommodate an insert, the second plunger opening is configured to cooperate with the socket, the outer plunger surface includes a cylindrical plunger surface and an undercut plunger surface wherein the undercut plunger surface is cylindrically shaped and is located at an end of the plunger body, and the inner plunger surface includes a plurality of inner cylindrical plunger surfaces and is fluidly linked to the outer socket surface by the plunger reservoir passage; and c) means for cold forming at least a portion of at least one of the socket and the leakdown plunger.