Electromagnetic clutch with two stage torque buildup

Details Electromagnetic clutch with two stage torque buildup Electromagnetic clutch with two stage torque buildup

F - Mech Eng,Light,Heat,Weapons

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F16D 27/10 (2006.01) F16D 27/112 (2006.01) F16D 55/00 (2006.01) F16D 65/14 (2006.01)

Patent

CA 1106784

ELECTROMAGNETIC CLUTCH WITH TWO STAGE TORQUE BUILDUP Abstract of the Disclosure An electromagnetic clutch or brake of the type having a clutch inner body with inner and outer pole faces drawn into engagement with an armature in order to establish driving engagement of the clutch. A two stage buildup of the torque is produced by an offsetting bias of the inner body pole faces by a nonmagnetic resilient ring separating the pole faces, and a shunt washer of a ferromagnetic material which serves to successively draw the pole faces into engagement with the armature by varying the reluc- tance through the inner and outer poles as the inner body is drawn into engagement. The resulting two stage torque buildup slows the engagement time of the clutch to thereby enable the use of rapid action torque booster clutch designs in applications requiring slower clutch action.

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