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:
Mar. 20, 2001
Filed:
Sep. 23, 1999
William J. Baxter, Bloomfield Hills, MI (US);
Anil K. Sachdev, Rochester Hills, MI (US);
Raja K. Mishra, Shelby Township, MI (US);
General Motors Corporation, Detroit, MI (US);
Abstract
The present invention provides a cast piston for an internal combustion engine comprising a crown region subjected to relatively higher service temperature than other regions of the piston. The crown region has a microstructure including an alloy matrix with reinforcing material and strengthening precipitates providing strength properties suited to the higher crown service temperature by virtue of the precipitates having better resistance to averaging as compared to different strengthening precipitates formed in a microstructure of other regions of the piston subjected to lower service temperatures. The different precipitates at the other regions of the piston provide strength properties suited to relatively lower temperatures at those regions.