John A. Grogg

Solenoid valve controlled all-wheel drive hydraulic coupling assembly

Variably controlled torque coupling device for on-demand all-wheel drive drivetrains

Electronically controlled hydraulic actuator for limited slip differential assembly

Solenoid actuated variable pressure relief valve assembly for limited slip differential assembly

Solenoid actuated variable pressure relief valve assembly for torque transfer assembly

Wrap spring activated torque transfer device

Differential arrangement in motor vehicle has pressure relief valve arrangement with relief pressure selectively variable based on magnitude of electric current applied to actuator

Torque transfer device for demand-dependent operation of all-wheel drive vehicle auxiliary drive axle arrangement has friction clutch for selective coupling/decoupling of input/output shafts

Torque transfer assembly with solenoid actuated variable pressure relief valve assembly

Hydraulische Kupplungsanordnung Hydraulic clutch assembly