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:
Jan. 24, 2012
Filed:
May. 04, 2009
John R. Bradley, Clarkston, MI (US);
Michael H. Lovell, Leonard, MI (US);
Kevin R. Marks, Durand, MI (US);
Terry A. Kent, East China, MI (US);
Donald W Cotton, Royal Oak, MI (US);
John R. Bradley, Clarkston, MI (US);
Michael H. Lovell, Leonard, MI (US);
Kevin R. Marks, Durand, MI (US);
Terry A. Kent, East China, MI (US);
Donald W Cotton, Royal Oak, MI (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
Articles are often formed from a tubular workpiece in a process which does not usefully shape the ends of the tube. In an embodiment of the invention, tube ends may be mechanically reduced in cross section and then expanded against a secondary forming surface(s) using an electromagnetic force to obtain desired shapes for the tube ends and minimize scrapping of workpiece material.