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:
Oct. 29, 1991
Filed:
Apr. 24, 1990
Applicant:
Inventors:
Ryoichi Takahashi, Fuji, JP;
Tomoyoshi Sato, Fujisawa, JP;
Hidehiko Tsukamoto, Hiroshima, JP;
Kazuo Morimoto, Hiroshima, JP;
Nobutaka Maeda, Hiroshima, JP;
Assignees:
Nissan Motor Co., Ltd., Yokohama, JP;
Mitsubishi Jukogyo Kabushiki, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B21D / ; B21K / ;
U.S. Cl.
CPC ...
72 68 ; 72 70 ; 72 88 ; 72340 ; 2988808 ;
Abstract
A pair of dies are provided of which die faces are formed with depressions sequentially brought into engagement with a particular portion of a workpiece as the workpiece rolls between the die faces. By compressing the workpiece while driving the same to roll between the die faces, an excess metal of the workpiece is caused to flow into the depressions sequentially for thereby forming an asymmetrical part of the article.