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:
Nov. 10, 1992
Filed:
Mar. 14, 1991
Makoto Hagiwara, Utsunomiya, JP;
Viscodrive Japan Kabushiki Kaisha, Tokyo, JP;
Abstract
A novel viscous coupling for transmitting rotary torque via a viscous fluid has first and second torque transmission members, a working chamber hermetically packed with a viscous fluid, and first and second plates alternately disposed in the working chamber. The transmission of rotary torque between the first and second transmission members is carried out via viscous resistance of the viscous fluid between the first and second plates. The aforesaid viscous coupling is characterized by providing with a multi-plate clutch to adjust transmission power of the rotary torque between at least one of the plates and the torque transmission members. The coupling includes an externally operable engaging means for fastening the multi-plate clutch by pressing clutch plates of the multi-plate clutch. Also, the coupling has passages for leading the viscous fluid to contact portions between the clutch plates and the plates.