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:
Apr. 08, 1997
Filed:
Jan. 19, 1995
Hans Martin, Stuttgart, DE;
BEHR GmbH & Co., Stuttgart, DE;
Abstract
A fan drive with a fluid-friction clutch comprises an input shaft with input disk and a clutch housing. This housing is rotatably mounted on the input shaft and bears a fan driven via the input shaft by a motor vehicle engine and serves to deliver cooling air through a cooling circuit radiator and/or a refrigerant circuit condenser. To increase the fan speed, the fluid-friction clutch housing is driven through at least one freewheel by an electric motor attached to the vehicle. The driving (switching on and off) by the electric motor takes place as a function of the fan speed n.sub.2 and/or as a function of the temperature of the coolant or refrigerant. A second freewheel may be arranged in the engine-side drive train. The clutch hub is extended axially by a cylindrical hub piece that accommodates, via a ball bearing, an input-shaft stub that bears the second freewheel, which is secured in a hollow hub that drives the input disk via the input shaft.