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:
Nov. 10, 2015
Filed:
Jun. 06, 2008
Alexander D. Khakhalev, Troy, MI (US);
Sanjay M. Shah, Troy, MI (US);
Charles J. Bruggemann, Rochester Hills, MI (US);
Daniel C. Hutchinson, Goodrich, MI (US);
Joseph M. Lendway, Iv, Dryden, MI (US);
Alexander D. Khakhalev, Troy, MI (US);
Sanjay M. Shah, Troy, MI (US);
Charles J. Bruggemann, Rochester Hills, MI (US);
Daniel C. Hutchinson, Goodrich, MI (US);
Joseph M. Lendway, IV, Dryden, MI (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
A joining operation for a stack of three metal sheets performed using only a single welding step, with access to only one sheet side being required. An inner sheet of the stack has formed therein a pair of bifurcated projections, wherein at least one first apex faces in one direction and at least one second apex faces in the opposite direction. First and second outer metal sheets are assembled with the inner sheet, wherein the first outer sheet abuts the at least one first apex, and the second outer sheet abuts the at least one second apex. A projection welding apparatus welds the sheets, using only access to the first outer sheet superposed the bifurcated projections, wherein a majority of the current flows through the second outer sheet.