Friction gear transmission systems or components inventions

20080287250 - Electronically-controlled hydraulically-actuated coupling: A power transmission device includes a friction clutch operable to selectively transfer torque between an input member and an output member. An actuator is operable to provide an actuating force to the friction clutch. The actuator includes an electric motor having an output shaft drivingly coupled to a pump. The... Agent: Harness, Dickey & Pierce, P.L.C

20080287251 - Power transmission device: A power transmission system having a positive displacement pump which is driven by a prime mover, and an output member which is driven by a fluid discharged from the positive displacement pump, characterized by comprising a rotational direction switching mechanism for switching a rotational direction of the output member between... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, P.C.

20080274855 - Gearless speed reducer or increaser: A gearless speed reducer or increaser consists of an input shaft, an output shaft, and a motor connected to the input shaft. There is an external race connected to one of the shafts, and an internal race attached to the other shaft. Two ball bearings are disposed between the races.... Agent: Collard & Roe, P.C.