Abstract: This invention relates to a power transmission device for coupling an input or driving shaft with an output or driven shaft. The power transmission device permits the output shaft to be engaged or disengaged from the input shaft. The device comprises a first side gear mechanically connected to the output shaft and a second side gear mechanically coupled to a brake which can decrease the rate of rotation of the second side gear to zero. In one embodiment, the gear ratio between the first side gear and the second side gear is greater than one. The device further comprises carried gears rotatably engageably coupled with the first and second side gears such that the carried gears rotate between and around the first and second side gears. The carried gears are carried by a gear carrier. The carried gears are mechanically connected to the gear carrier such that rotation of the input shaft on its axis causes the gear carrier to carry the carried gears around the first and second side gears.

Abstract: The invention relates to torque transmission device which is manually controlled in response to a differential in rotational velocity between a shaft and an actuating plate mounted on the shaft. The device acts as a deadman brake, clutch and/or as a power assist for various mechanically driven manually controlled devices. The device comprises a shaft having a longitudinal axis, forward and rearward ends. An input plate journalled to rotate, under motive force, about the axis at a position longitudinally fixed and forward relative to the shaft. A forward clutch plate is mounted for rotation with the shaft and reciprocating longitudinal motion on the shaft rearward of the input plate. An actuating plate is mounted on the shaft rearward of the forward clutch plate. The shaft and actuating plate interact with threads to move the actuating plate longitudinally relative to the shaft in response to a differential in rotational velocity between the shaft and actuating plate.

Abstract: A friction clutch system is disclosed to couple a drive shaft and a driven shaft together by hydraulically urging clutch surfaces together. A pump for pressurizing the hydraulic system is mechanically coupled between the drive and driven shafts to rotate at speeds increasing with the difference in their respective speeds.