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. 10, 2008
Filed:
May. 19, 2005
Applicants:
Israel Stol, Pittsburgh, PA (US);
John W. Cobes, Lower Burrell, PA (US);
Inventors:
Israel Stol, Pittsburgh, PA (US);
John W. Cobes, Lower Burrell, PA (US);
Assignee:
Alcoa Inc., Pittsburgh, PA (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B23K 20/12 (2006.01);
U.S. Cl.
CPC ...
Abstract
A fracture resistant friction stir welding tool includes a pin for plunging into one or more workpiece(s) to be welded and a shoulder for preventing plasticized material from flowing out of the joint being welded. The friction stir welding tool includes a tool body including a cavity for receiving the shoulder and exerting a compressive stress on the shoulder, and the pin is placed in compression by an axial tension member in the pin.