The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 23, 2009
Filed:
Feb. 06, 2007
Jill M. Cummings, Bay City, MI (US);
Tim A. Watson, Lake, MI (US);
William M. Penzer, Byron, MI (US);
Gary W. Beemer, Attica, MI (US);
Albert J. Black, Swartz Creek, MI (US);
Jill M. Cummings, Bay City, MI (US);
Tim A. Watson, Lake, MI (US);
William M. Penzer, Byron, MI (US);
Gary W. Beemer, Attica, MI (US);
Albert J. Black, Swartz Creek, MI (US);
GM Global Technology Operations, Inc., Detroit, MI (US);
Abstract
A piston testing apparatus is provided including a housing having an inner wall and defining a cavity therethrough; a piston disposed in the housing cavity and having a polymer coating deposited thereon, wherein the polymer coating of the piston contacts the housing inner wall; a connecting rod coupled to the piston; and an actuator coupled to the connecting rod and configured to provide a reciprocating movement of the piston through the cavity. An injection plate for the piston testing apparatus and a method for challenging an adhesion of the polymer coating to the piston are also described.