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:
Jan. 11, 2005
Filed:
Jun. 24, 2003
Applicants:
Mark W. Gillman, Algonac, MI (US);
Rodney K. Elnick, Washington, MI (US);
Todd R. Ridley, Rochester Hills, MI (US);
Inventors:
Mark W. Gillman, Algonac, MI (US);
Rodney K. Elnick, Washington, MI (US);
Todd R. Ridley, Rochester Hills, MI (US);
Assignee:
General Motors Corporation, Detroit, MI (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16J 114 ;
U.S. Cl.
CPC ...
Abstract
A cast engine piston has a crown with a combustion surface and an undercrown for exposure to crankcase fluids. A plurality of pins extend from the undercrown to increase the surface area of the undercrown. The pins draw heat from the crown and dissipate the heat to the crankcase fluids. Crankcase oil may be sprayed, splashed, or misted against the pins to further increase heat dissipation.