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:
Aug. 17, 2004
Filed:
Jul. 08, 2002
Hideki Kasahara, Naka-gun, JP;
Masumi Katsumoto, Chigasaki, JP;
Masaharu Miyahisa, Fujisawa, JP;
Yoshihiro Boki, Fujisawa, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A battery case ( ), substantially square in cross section, has four lateral walls ( ) each of which is gradually arc-shaped to expand outwardly with a radius of curvature R The cross section is adapted to satisfy equation R /r=4 to 20, where r is the distance between a midpoint (C ) of each lateral wall ( ) and the center point (C ) in the cross section of the battery case ( ) and R is the radius of curvature. In addition, the battery case ( ) is rounded at each corner with a radius of curvature of R and has a cross section that satisfies equation R /r=0.3 to 0.8, where r is the distance between the midpoint (C ) of each lateral wall ( ) and the center point (C ) in the cross section of the battery case ( ) and R is the radius of curvature of each corner.