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. 24, 2015
Filed:
Jun. 14, 2013
Applicants:
Hiroshi Ogawa, Wakayama, JP;
Kazuya Ogawa, Wakayama, JP;
Inventors:
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B21D 53/40 (2006.01); E05D 5/06 (2006.01); B21D 53/88 (2006.01); B21J 5/02 (2006.01); B21J 5/10 (2006.01); B21K 1/74 (2006.01); B21K 13/02 (2006.01); E05D 11/00 (2006.01); E05D 9/00 (2006.01); B21K 23/00 (2006.01);
U.S. Cl.
CPC ...
E05D 5/062 (2013.01); B21D 53/40 (2013.01); B21D 53/88 (2013.01); B21J 5/02 (2013.01); B21J 5/10 (2013.01); B21K 1/74 (2013.01); B21K 13/02 (2013.01); E05D 11/00 (2013.01); E05D 9/00 (2013.01); B21K 23/00 (2013.01); E05Y 2800/465 (2013.01);
Abstract
A method of manufacturing an automobile door hinge includes hot forging a round steel bar to form a forged workpiece including a mounting portion, an arm portion, and a column portion, and forming a shaft hole by punching the column portion by using a special die and a punch. The die has a gap formed therein so that, during punching, a slug is not generated and the column portion expands outward when the punch is pressed from a punching start point to a predetermined dimension, and a slug is generated and discharged when the punch is pressed from the predetermined dimension to a punching end point.