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:
Mar. 03, 1998
Filed:
May. 09, 1997
Applicant:
Inventors:
Kouichi Mine, Aichi-ken, JP;
Akio Hotta, Toyota, JP;
Assignee:
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B21D / ; B21D / ; B21C / ;
U.S. Cl.
CPC ...
72348 ; 72349 ; 723794 ;
Abstract
A method for manufacturing a cup-shaped article includes making the thickness of a cylinder portion of a cup-shaped configuration uniform, between a step of drawing a flat plate material portion into a cup-shaped configuration and a step of ironing the cup-shaped configuration into a final cup-shaped article. Increasing the thickness may be performed by coining or axial compression. The thickness increasing step may be replaced by a step, provided prior to the drawing step, of providing a plate material portion having a greater thickness at a radially inner portion than at a radially outer portion.