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:
Jun. 03, 2008
Filed:
Feb. 28, 2007
Applicants:
Mike M. Ghiran, Lake Orion, MI (US);
Sanjay M. Shah, Troy, MI (US);
Inventors:
Mike M. Ghiran, Lake Orion, MI (US);
Sanjay M. Shah, Troy, MI (US);
Assignee:
GM Global Technology Operations, Inc., Detroit, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B21D 22/12 (2006.01); B21D 51/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
An apparatus and method for locally expanding tubular member includes a pre-form die having a cavity with an expansion chamber therein to receive a portion of a tubular blank between ends thereof. The apparatus also includes a bladder apparatus for insertion in the tubular blank and cooperating with the pre-form die to locally expand the portion of the tubular blank in the expansion chamber to form a locally expanded tubular member.