Automotive accessory drive system

Details Automotive accessory drive system Automotive accessory drive system

2008-01-29

2008-01-29

Ridley, Richard (Department: 3682)

Endless belt power transmission systems or components

Means for adjusting belt tension or for shifting belt,...

Tension adjuster or shifter driven by electrical or fluid motor

C474S109000

Reexamination Certificate

active

11286688

ABSTRACT:
The apparatus of the present invention provides an improved automotive accessory drive system. The automotive accessory drive system including a drive pulley operatively connected to an engine, and a plurality of driven pulleys operatively connected to one of a plurality of driven devices. A flexible drive belt connectively couples the drive pulley and the plurality of driven pulleys, and is operable to transfer drive forces therebetween. The automotive accessory drive system also includes a flexible drive belt tensioner operable to maintain frictional engagement between the flexible drive belt and the drive pulley and at least one of the driven pulleys. The flexible drive belt tensioner has a damper element that preferably includes a damper housing, and a variable viscosity fluid disposed within the damper housing. The variable viscosity fluid is configured to provide a variable dampening rate and is selectively operable to lock the flexible drive belt tensioner.

REFERENCES:
patent: H001292 (1994-03-01), Marsh
patent: 5752891 (1998-05-01), Meckstroth et al.
patent: 6817597 (2004-11-01), Thurow et al.
patent: 2002/0039942 (2002-04-01), Liu et al.
patent: 2005/0148420 (2005-07-01), Murao

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