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:
Apr. 15, 2003
Filed:
Jan. 25, 2001
Applicant:
Inventors:
John Robert Bradley, Clarkston, MI (US);
John E. Carsley, St. Clair Shores, MI (US);
Jacob Lyjak, Washington Township, MI (US);
Assignee:
General Motors Corporation, Detroit, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C22F 1/04 ;
U.S. Cl.
CPC ...
C22F 1/04 ;
Abstract
The superplastic forming of suitable metal alloy sheets into strong components, such as automobile body structures or panels, is improved and accomplished faster by simultaneously forming two or more substantially identical, relatively thin sheets, preferably about 2 mm or less in thickness, rather than a single sheet of the same overall thickness. For example, two or more layers of thin AA5083 sheets can be stretched formed together at about 500° C. with greater deformation and elongation than a single sheet of comparable thickness.