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. 22, 2003
Filed:
Jan. 19, 2001
Applicant:
Inventors:
Assignee:
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01M 6/10 ; H01M 2/12 ; H01M 2/02 ;
U.S. Cl.
CPC ...
H01M 6/10 ; H01M 2/12 ; H01M 2/02 ;
Abstract
A cylindrical type alkaline storage battery includes a metallic case, a sealing plate for the metallic case, and a spiral-shaped group of electrodes. The group of electrodes includes a positive electrode plate, a negative electrode plate and a separator. The sealing plate includes a cap-shaped terminal plate, which includes a cap part and a flange, and a disc-shaped filter on the underside of the flange. The disc shaped filter has a gas venting hole in its center. A safety valve is included between the flange and the filter. A space between the metallic case and the rims of the flange and of the filter is sealed with a gasket.