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:
Dec. 16, 1980
Filed:
Oct. 13, 1978
Allen W De Jong, Chatham, CA;
Canadian Fram Limited, Chatham, CA;
Abstract
An electromechanical clutch for vehicle engine cooling fans includes a driving member mounted for rotation by the vehicle engine and a driven member rotatably mounted on the driving member. The driven member carries the engine cooling fan, and the driving member houses a magnetic coil which is energized to actuate the clutch. The driving and driven members define a circumferentially extending gap therebetween. A band is disposed within the gap, and includes an inner band member made of electromagnetic material and an outer band member comprising a resilient member with a frictional material attached to the outer circumference thereof. The inner and outer band members are joined together so that the inner and outer band members may move radially relative to one another while actuation forces may be transmitted from the inner to the outer band to the connection therebetween. When the clutch is engaged, the inner band member is drawn into driving engagement with the driving member by energization of the electromagnetic coil. Accordingly, actuation forces are transmitted from the driving member to the driven member through the inner band member and the outer band member. However, since only a frictional engagement exists between the outer band member and the driven member, the outer band member is permitted to slip relative to the driven member, thereby accommodating any torque overload condition.