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. 15, 2005
Filed:
Feb. 19, 2001
Yoshio Goda, Yao, JP;
Tadahiro Tokumoto, Hirakata, JP;
Ryuichiro Ebi, Osaka, JP;
Tomomichi Ueda, Osaka, JP;
Masanori Makino, Daito, JP;
Yoshio Goda, Yao, JP;
Tadahiro Tokumoto, Hirakata, JP;
Ryuichiro Ebi, Osaka, JP;
Tomomichi Ueda, Osaka, JP;
Masanori Makino, Daito, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A battery case () has a cutting groove () formed on its elongated side surface (). Between a groove bottom surface of the cutting groove () and an inner surface of the battery case () is provided a thin-walled easily-rupturable portion () designed to rupture at an instant when an internal pressure of the battery case () reaches a predetermined value. Thereby, a safety mechanism for use with a prismatic battery is realized. The manufacture of the safety mechanism is as follows. A cutting blade () rotated at a high speed by a high-speed rotary body () is brought into cutting engagement with the elongated side surface () of the battery case () of the prismatic battery in finished form until it reaches a predetermined depth and is fixed, and subsequently the high-speed rotary body () or the prismatic battery is brought into rectilinear relative movement.