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. 31, 1992
Filed:
Oct. 05, 1990
Ryuji Nakamura, Toyota, JP;
Aisin Seiki Kabushiki Kaisha, Kariya, JP;
Abstract
A viscous fluid coupling apparatus includes a shaft, a rotor, and a housing. The housing has a separator plate and a partition wall. The separator plate divides an inside of the housing into a reservoir chamber and an actuator chamber having a torque transmitter portion, and it has a communication hole communicating the reservoir chamber with the actuator chamber and a pump protrusion for transferring the viscous fluid in the reservoir chamber to the actuator chamber via the communication hole. The partition wall divides the reservoir chamber into an inner peripheral reservoir chamber communicated to the actuator chamber and an outer peripheral reservoir chamber communicated to the actuator chamber. Viscous fluid is pumped from the actuator chamber to the inner peripheral chamber by the pump hole, the pump protrusion and the communication hole, and less of the viscous fluid remains less in the actuator chamber when an engine is stopped. Therefore, less induced rotation occurs.