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. 11, 2011
Filed:
Oct. 31, 2007
Qi Yang, Farmington Hills, MI (US);
Harsha Badarinarayan, Novi, MI (US);
Frank Hunt, West Bloomfield, MI (US);
Kazutaka Okamoto, Novi, MI (US);
Qi Yang, Farmington Hills, MI (US);
Harsha Badarinarayan, Novi, MI (US);
Frank Hunt, West Bloomfield, MI (US);
Kazutaka Okamoto, Novi, MI (US);
Hitachi, Ltd, Tokyo, JP;
Abstract
A method for fabricating multi-sheet structures in which a first sheet is arranged on a planar support and a blowing agent is placed on at least one selected portion of the first sheet. A second sheet is positioned over the first sheet so that the second sheet overlies the selected portion of the first sheet and the first and second sheets are then secured together by friction stir welding in a pattern which encloses the selected portion of the first sheet. Additional sheets may be secured together in a like fashion. Thereafter, the sheets are heated to a temperature sufficient to decompose the blowing agent.