Steven D Krause

US Patent:

20130220115, Aug 29, 2013

Filed:

Oct 26, 2012

Appl. No.:

13/661597

Inventors:

Andrew J. Miller - Plymouth MI, US
Steven Krause - Plymouth MI, US
Achim Adam - Nauheim, DE
Joachim Schlueter - Weisbaden, DE

Assignee:

Federal-Mogul Corporation - Southfield MI

International Classification:

F16J 1/00

US Classification:

92187, 29888044

Abstract:

A piston assembly comprises a piston body, a connecting rod, and a wrist pin. The piston body includes a pair of first cross bores presenting a piston sliding surface. The connecting rod includes a second cross bore presenting a rod sliding surface which is axially aligned with the first cross bores of the piston body. A wrist pin is disposed in the aligned cross bores and couples the piston body to the connecting rod. The wrist pin also presents a pin sliding surface facing the rod sliding surface and the piston sliding surfaces. A coating is applied to at least one of the sliding surfaces, such as by dipping, brushing, atomizing, spraying, printing, or screen printing. The coating includes a polymer matrix, such as polyamide imide (PAI), and hard particles, such as FeO, disposed throughout the polymer matrix. The hard particles have a hardness of at least 600 HV/0.5.