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. 30, 2012
Filed:
Aug. 05, 2009
Ichiro Matsuhisa, Hyogo, JP;
Susumu Kato, Osaka, JP;
Ichiro Matsuhisa, Hyogo, JP;
Susumu Kato, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A gasket is made of an injection molded resin integral with a cylindrical boss portion having a through hole in which a current collector is inserted, a rim portion for sealing an opening of a battery case, and a connecting portion for connecting the boss portion and the rim portion, wherein the boss portion has an annular injection portion at an end face thereof, which is a trace of an injection molding gate, a ratio (S/S) between an axial cross-sectional area (S) of the boss portion and an axial cross-sectional area (S) of the injection portion is in the range of 10 to 25, and an outer diameter of the boss portion is in the range of 3.0 to 4.2 mm.