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:
Jul. 15, 2003
Filed:
Sep. 20, 2000
Masataka Iida, Toyota, JP;
Masahiko Takeuchi, Toyota, JP;
Sadao Ishihara, Okazaki, JP;
Takanori Matsukura, Nishikamo-gun, JP;
Takayuki Furuhata, Seto, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
A structural member having a closed section, and an apparatus and a method for producing the same are provided to decrease production costs and secure the dimensional accuracy by a simple construction. The apparatus produces a structural member provided with a channel-shaped sectional portion and closed sectional portions adjacent thereto by bending a work and includes a press mold formed of a punch and a die oppositely installed and used for press-forming so that both side edges of the work are caused to overlap on the bottom wall of the channel-shaped sectional portion, and a fall-down prevention means which prevents both side edges opposed to each other of the work to be press-formed in the press mold from falling down and guides both side edges so that the end faces thereof are brought into contact with each other. Since the die applies a compression force to the work due to the end faces of the work brought into contact with the fall-down prevention means being pressed to each other, a curved portion having a residual compression stress between the longitudinal outer side wall and the vertical outer side wall is formed.