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:
Jan. 17, 1989
Filed:
Apr. 03, 1987
Kiyohito Murata, Susono, JP;
Fumihiro Ushijima, Okazaki, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
A hydraulically operated friction clutch, having a driving and a driven rotary member frictionally engageable with each other, a movable member axially movable for frictional engagement of the driving and driven rotary members, and an actuator piston axially slidable by a pressure in a pressure chamber, for moving the movable member. The actuator piston has a control passage which communicates with the pressure chamber and a discharge passage. The clutch further has a shut-off valve disposed in operative association with the actuator piston and the movable member. The shut-off valve includes a closure member which is movable relative to the actuator piston and which has a first position for closing the control passage, and a second position for opening the control passage. The closure member is placed in the second position when the actuator piston has been moved to a predetermined ready-to-operate position which is a predetermined first distance away from the movable member. The discharge passage is opened and closed according to signals from a controller.