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:
Apr. 22, 2008
Filed:
Oct. 04, 2004
Satoshi Shimizu, Hamura, JP;
Norihiko Kikuchi, Hamura, JP;
Tatsushi Yurudume, Hamura, JP;
Hisao Hoshino, Hamura, JP;
Takao Minagawa, Hamura, JP;
Hiroyuki Osaka, Hamura, JP;
Makoto Noudou, Hamura, JP;
Shigeki Kishihara, Kawasaki, JP;
Shingo Shikuwa, Kawasaki, JP;
Satoshi Shimizu, Hamura, JP;
Norihiko Kikuchi, Hamura, JP;
Tatsushi Yurudume, Hamura, JP;
Hisao Hoshino, Hamura, JP;
Takao Minagawa, Hamura, JP;
Hiroyuki Osaka, Hamura, JP;
Makoto Noudou, Hamura, JP;
Shigeki Kishihara, Kawasaki, JP;
Shingo Shikuwa, Kawasaki, JP;
Kikuchi Co., Ltd., Hamura-shi, Tokyo, JP;
Abstract
A heat treatment operation can be executed, suppressing a wave-shaped deformation at a non heat-treatment region of an article to be heat treated. To an elongated-shaped article to be heat treated to which a raised portion extending in the longitudinal direction is formed, a hardening region, as a heat-treated region defined to extend in a longitudinal direction at a part of the raised portion, and a non-hardening region, as a non-heat-treated region defined to extend in the longitudinal direction at flange portion, and other parts of the raised portion are arranged side by side in a width direction orthogonal to the longitudinal direction. The flange portion is clamped by a first and a second clamp, arranged in the longitudinal direction, and one first clamp is a tight clamp for holding fixedly the flange portion and a plurality of second clamps are loose clamps for clamping loosely the flange portion, allowing the article to be heat treated to be convex on the side of the heated hardening region.