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:
May. 18, 1993
Filed:
Oct. 25, 1991
Kazuhisa Tamura, Neyagawa, JP;
Takao Fukunaga, Neyagawa, JP;
Daikin Clutch Corporation, Neyagawa, JP;
Abstract
A lock-up device disposed between a front cover and a turbine coaxial with the front cover of a torque converter includes a piston elastically connected to the turbine, a plurality of friction discs provided between the piston and the front cover, and an elastic member for spacing the friction discs apart from one another when the device is disengaged. When this lock-up device is engaged, the piston presses the friction discs against the front cover, whereby torque is transmitted to the turbine through the friction discs and the piston. When the lock-up device is disengaged, the piston is moved away from the front cover, and the elastic member spaces the friction discs apart from one another so as not to transmit torque. The performance of the lock-up device is thus improved in order to decrease drag torque.