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:
Dec. 11, 2007
Filed:
Oct. 30, 2006
Applicants:
Wuhua Yang, Ann Arbor, MI (US);
Michael L. Wenner, Oakland, MI (US);
Inventors:
Wuhua Yang, Ann Arbor, MI (US);
Michael L. Wenner, Oakland, MI (US);
Assignee:
GM Global Technology Operations, Inc., Detroit, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B21D 9/18 (2006.01); B21D 26/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method is provided for forming a tube between a pair of dies. The tube is captured between a pair of dies having die surfaces constructed of an electrically non-conducting material defining a die cavity therein. The ends of the tube are sealed and electrical current is applied to the tube to induce electrical resistance heating of the tube. The interior of the tube is pressurized to expand the tube into the cavity to thereby form the heated tube.