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:
Feb. 24, 2004
Filed:
Apr. 17, 2002
Applicant:
Inventors:
Edward Frank Ryntz, Warren, MI (US);
Richard Murray Kleber, Clarkston, MI (US);
Assignee:
General Motors Corporation, Detroit, MI (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B21D 3/920 ;
U.S. Cl.
CPC ...
B21D 3/920 ;
Abstract
Superplastic forming of sheet metal blanks is advanced both is quantity and quality with the utilization of a part separating and pressure distributing mid plate sandwiched between a pair of blanks. This arrangement is loaded between upper and lower die halves operatively mounted in a heated press which closes to effect the piercing of one of the blanks by a nozzle which subsequently delivers pressurized air or other inert gas to an intermediate chamber formed by the mid plate between the blanks to effect the simlayaneously forming of separate parts in both forming dies.