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:
Nov. 29, 2016
Filed:
Mar. 13, 2012
Applicants:
Masato Ootsuka, Osaka, JP;
Shigeru Morikawa, Hiroshima, JP;
Inventors:
Masato Ootsuka, Osaka, JP;
Shigeru Morikawa, Hiroshima, JP;
Assignee:
NISSHIN STEEL CO., LTD., , JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01M 2/12 (2006.01); B21D 51/38 (2006.01);
U.S. Cl.
CPC ...
H01M 2/12 (2013.01); B21D 51/383 (2013.01); H01M 2/1241 (2013.01);
Abstract
In a method for manufacturing a battery safety valve according to the present invention, a stainless steel metal sheet is used, and an thin annular portion constituting an edge portion of a safety valve is formed in a lid by simultaneously pressing annular projecting portions provided respectively on a punch and a die so as to oppose each other, against respective surfaces of the lid.