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:
Sep. 08, 2020
Filed:
Mar. 21, 2017
Mazda Motor Corporation, Hiroshima, JP;
Tomotaka Ishizaka, Hiroshima, JP;
Tatsuhiko Iwasaki, Hiroshima, JP;
Norio Iwashita, Hiroshima, JP;
Tatsutoshi Mizobe, Hiroshima, JP;
Kaori Sako, Hiroshima, JP;
Tadashi Saito, Hiroshima, JP;
Tomohiro Kubo, Hiroshima, JP;
Manabu Sasahara, Hiroshima, JP;
Yutaro Fukuda, Hiroshima, JP;
Shinya Kamada, Kure, JP;
MAZDA MOTOR CORPORATION, Hiroshima, JP;
Abstract
A frictional engagement element includes: a first piston, a second piston, a first urging member for urging the first piston in a direction of releasing a friction plate, and a second urging member for urging the second piston in the direction of releasing the friction plate with an urging force larger than the urging force of the first urging member. One of the first and second pistons has a communicating hole for connecting an engaging hydraulic chamber with an opposite hydraulic chamber and the other of the first and second pistons has a valve part for closing the communicating hole. The difference in travel distance between the first and second pistons in motion due to the different urging forces of the first and second urging members causes the valve part to open the communicating hole.