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:
Sep. 20, 2011
Filed:
Apr. 20, 2007
Mike M. Ghiran, Lake Orion, MI (US);
Spyros P. Mellas, Waterford, MI (US);
David R. Jensen, Swartz Creek, MI (US);
Paul D. Larsen, Fenton, MI (US);
Mike M. Ghiran, Lake Orion, MI (US);
Spyros P. Mellas, Waterford, MI (US);
David R. Jensen, Swartz Creek, MI (US);
Paul D. Larsen, Fenton, MI (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
A method is provided for joining tubes. An outer tube and an inner tube are provided. An end of the inner tube is inserted into an end of the outer tube to form an overlapped region of tube wall and form a pressure tight joint between the tubes. The overlapped region of the tubes is heated. The tubes are placed in pair of dies having a die cavity adjacent to the outer tube. Pressure is introduced into the tubes to expand the overlapped region of the tubes outwardly into the die cavity and thereby form an interlocking joint between the overlapped region of the outer tube and the inner tube.