Viscous fan drive having modified land design and armature...

Details Viscous fan drive having modified land design and armature... Viscous fan drive having modified land design and armature...

2006-03-02

2009-11-24

Lorence, Richard M. (Department: 3655)

192 clutches and power-stop control

Clutches

Fluent material

C192S058700

Reexamination Certificate

active

07621386

ABSTRACT:
A viscous fan drive in which the output drive to the fan is controlled by the movement of viscous fluid from a fluid reservoir and into the operating and working chamber of the coupling during normal operation. The input-coupling assembly and cover member are formed with a unique combination of continuous and non-continuous radially extending lands and grooves designed to distribute the viscous fluid in a continuous film throughout the shear zone so as to maximize output fan speed at a given input speed. An armature-venting feature is designed to simplify the opening and closing of the valve disk in an electronic version of the viscous fan drive depending upon the desired operating condition.

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