Patent ID: 8235195

Claim:
A clutch for an engine, comprising: a drive shaft operatively connectable to the engine for rotation thereby, the drive shaft having an opening extending therethrough; a device shaft positionable in the opening of the drive shaft and rotatable thereby, the device shaft having a plurality of cylinders extending radially therethrough and a channel extending longitudinally therethrough with fluid communication therebetween, the device shaft connectable to a device for rotation therewith; a clutch fluid selectively flowing between the plurality of cylinders and the channel, the clutch fluid comprising a carrier fluid with a plurality of magnetic particles therein; a plurality of pistons, each of the plurality of pistons positionable in one of the plurality of cylinders and slidably movable therein for operative contact with the drive shaft; a bearing between the plurality of pistons and the drive shaft; and a fluid regulator comprising a pair of opposing magnets positionable in the channel for aligning at least a portion of the plurality of magnetic particles in the channel to selectively restrict flow of at least a portion of the clutch fluid such that the plurality of pistons are selectively reciprocated whereby a rotational speed of the device shaft is adjusted.