Positive displacement coupling device
Power transmission apparatus
Power transmission apparatus
Power transmission apparatus
Power transmission apparatus
Power transmission apparatus
Power transmission apparatus for vehicle of four-wheel drive typ
Power transmission unit
Preloaded control arm for a viscous fluid clutch
Pressure activated rotary clutch
Pressure-responsive fluid check valve and method for viscous flu
Pulse control of an electro magnetically actuated viscous fluid
Pump lock-up power transmission
Pump plate assembly for a viscous fluid clutch
Pumping element for temperature responsive viscous fan drive