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. 19, 2021
Filed:
Nov. 13, 2018
Mazda Motor Corporation, Hiroshima, JP;
Masanori Sasaki, Hiroshima, JP;
Masamichi Fujikawa, Hatsukaichi, JP;
Kazuhiro Yamada, Hiroshima, JP;
Kensuke Ueda, Aki-gun, JP;
Sayaka Katayama, Hiroshima, JP;
Yasuo Miura, Hiroshima, JP;
Takeyuki Tanaka, Hiroshima, JP;
Hirokazu Kouno, Hiroshima, JP;
Takashi Miyamoto, Hiroshima, JP;
Ryohei Hanamure, Hiroshima, JP;
Siyuan Tao, Hiroshima, JP;
Mazda Motor Corporation, Hiroshima, JP;
Abstract
A power transmission device in an automatic transmission includes a friction tightening element (a second brake) having a drum member, and a transmission path constituent member (a third ring gear) coupled to the drum member via a coupling part extending circumferentially along the drum member, the drum member having low-rigidity parts (long holes) provided at a plurality of circumferential positions on the drum member in at least one of portions radially outside and inside the coupling part.