Clutch assembly for electrically operated retractable jack

Details Clutch assembly for electrically operated retractable jack Clutch assembly for electrically operated retractable jack

F - Mech Eng,Light,Heat,Weapons

16

D

192/16, 254/24

F16D 13/22 (2006.01)

Patent

CA 1143306

Abstract of the Disclosure An electrically operated retractable jack for leveling a vehicle. The jack is automatically retractable from a vertical position into a hori- zontal stowage position under the vehicle. The jack may be operated indivi- dually or a plurality of jacks may be used in leveling the corners of a vehicle. The jacks may be raised and lowered by control switches mounted inside the vehicle without the need of the operator getting outside the vehicle. The jack makes use of a torque limiting clutch which prevents overloading of the motor and prevents the jack from locking up during raising or lowering of the jack. The clutch comprises a drive gear having several spaced valleys in one of its flat surfaces and a drive plate with apertures aligned with the valleys. Balls disposed in the apertures extend into the valleys and are spring biased into the valleys. The biasing force deter- mines the torque which can be transmitted because when this predetermined torque is reached the balls roll freely into and out of the valleys.

339695

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