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:
Feb. 20, 2018
Filed:
Nov. 05, 2013
Kabushiki Kaisha Toyota Jidoshokki, Kariya-shi, Aichi-ken, JP;
Akihisa Matsudo, Kariya, JP;
Motoaki Okuda, Kariya, JP;
Masami Tomioka, Kariya, JP;
Hiroyasu Nishihara, Kariya, JP;
Mikiya Kurita, Kariya, JP;
KABUSHIKI KAISHA TOYOTA JIDOSHOKKI, Kariya-Shi, JP;
Abstract
A power storage device includes a case and a pressure release valve. The pressure release valve includes arcuate portions, intersecting grooves, and arcuate grooves that are connected to the ends of the intersecting grooves and extend along the arcuate portions. When imaginary straight lines extend along the intersecting grooves and intersect the circumferential edge of the pressure release valve, a first region, which is surrounded by the imaginary straight lines and the circumferential edge of the pressure release valve, and a second region, which is surrounded by the imaginary straight lines and the circumferential edge of the pressure release valve, are defined. The part of the first region that is in contact with the arcuate portions is larger than the part of the second region that is in contact with the arcuate portions. The area of the first region is greater than the area of the second region.