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:
Mar. 17, 2020
Filed:
Apr. 16, 2018
Toyota Boshoku Kabushiki Kaisha, Aichi-ken, JP;
Kunihiro Yamaura, Tokai, JP;
TOYOTA BOSHOKU KABUSHIKI KAISHA, Aichi-Ken, JP;
Abstract
An end plate for a fuel cell stack includes a metal plate body having through-holes and inner circumference covering portions, which cover the inner circumferential surfaces of the through-holes. A part of the outer circumferential surface of the plate body that corresponds to inner ends of the inner circumference covering portions in the thickness direction is covered by an outer circumference covering portion, which is formed integrally with the inner circumference covering portions. The circumferential edge of the outer end of each through-hole is constituted by four linear portions and four arcuate portions connecting the ends of the linear portions to each other. The radius of curvature of each arcuate portion is in the range between 8 mm and 15 mm inclusive.