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:
Oct. 27, 1987
Filed:
Dec. 18, 1985
Applicant:
Inventor:
Seiya Tanaka, Bisai, JP;
Assignee:
Aisin Seiki Kabushiki Kaisha, Kariya, JP;
Primary Examiner:
Int. Cl.
CPC ...
F16D / ; F16D / ;
U.S. Cl.
CPC ...
192 / ; 192 / ;
Abstract
A viscous fluid coupling especially used for driving the cooling fan of engines, changing the rotation speed of the fan smoothly according to the temperature. The smooth change of the rotation speed, that is, the smooth change of torque transmission by the coupling is performed by employing a valve device which has a slot for passing fluid and a specially shaped valve member movable to control the opening and closing of the slot so that the rate of increase of the opening area of the slot is smaller in a low temperature region than in a high temperature region.