F - Mech Eng,Light,Heat,Weapons – 16 – D
Patent
F - Mech Eng,Light,Heat,Weapons
16
D
192/12
F16D 25/12 (2006.01) B60K 17/35 (2006.01) F16D 7/02 (2006.01) F16D 35/00 (2006.01) F16D 47/06 (2006.01)
Patent
CA 1271147
ABSTRACT A control coupling comprising an outer coupling part 1, an inner coupling part 2, a first set of annular plates 6 therebetween constituting a viscous shear coupling and a second set of annular plates 12 constituting a friction clutch, wherein a fluid tight axially movable piston 3 is disposed between the sets of plates, arranged to be movable axially to urge the plates 12 into torque transmitting engagement by expansion of the liquid in the viscous shear coupling. The movement of the piston is limited by a stop 17, and springs 8 are interposed between the piston and friction clutch plates so that the maximum torque transmissible by the coupling is limited. Under such conditions, the torque transmissible by the viscous shear coupling is negligible compared with that of the friction clutch. The coupling may be utilized between axles of a motor vehicle, or in a differential unit. in a further embodiment, Figure 4, the friction clutch may be electro-magnetically disengageable.
485936
Jordan Alfons
Ridout & Maybee Llp
Viscodrive G.m.b.h.
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