A continuously variable transmission device (1) for a two-wheel, three-wheel or four-wheel motorcycle includes a cam system (20, 22; 32a, 32b) operating between a fixed bushing (11) and a mobile bushing (9). The device is configured to obstruct the approach between the active surfaces (8a, 10a) or to facilitate the approach of the active surfaces.

A modular, continuously variable ratio transmission adapted to be coupled between the drive motor of a dual rotor riding trowel and the lower drive train. First and second rigid, generally planar frame plates are secured in parallel relation by a plurality of spacers. The first fame plate has a clearance orifice for admitting a portion of the trowel engine. A stub shaft receives input power and rotates a first pulley that drives a second pulley with a reduced diameter. A first jackshaft driven by said second pulley drives a variable CVT drive pulley affixed externally of the module. A second variable drive pulley coupled to said first variable drive pulley by a belt drives a second jackshaft splined to a fifth pulley that is coupled to a sixth pulley having a diameter greater than the diameter of said fifth pulley. The sixth pulley is coupled to trowel gearbox drive shafts.

A continuously-variable transmission (CVT) assembly is employed for transmitting a torque from an external power-source. The CVT includes a variable-diameter input pulley and a variable-diameter output pulley, each having a respective range of adjustment. The CVT also includes a continuous torque-transmitting element extending between the variable-diameter input pulley and the variable-diameter output pulley, and thereby operatively connecting the input pulley to the output pulley. The CVT additionally includes a first elastic element having a first zero stiffness over the range of adjustment of the variable-diameter input pulley and configured to apply a first constant spring clamping force via the input pulley to the continuous torque-transmitting element. Furthermore, the CVT includes a second elastic element having a second zero stiffness over the range of adjustment of the variable-diameter input pulley and configured to apply a second constant spring clamping force via the output pulley to the continuous torque-transmitting element.

A locomotion subassembly for a biped robot is disclosed. The locomotion subassembly includes several unique energy transfer mechanisms and arrangements for efficiently powering the motion of the robot.

A locomotion subassembly for a biped robot is disclosed. The locomotion subassembly includes several unique energy transfer mechanisms and arrangements for efficiently powering the motion of the robot.

A hydraulic control system stably controls pressure in a hydraulic chamber of a pulley accommodating a belt by controlling a feeding valve and a discharging valve. The control system reduces a control amount of the feeding valve to be smaller than that calculated based on a pressure difference in a case other than one in which pressure in the hydraulic chamber is increased by delivering oil to another chamber, in case the pressure in the hydraulic chamber is increased by delivering the oil to the other chamber. The control system reduces a control amount of the discharging valve to be smaller than that calculated based on the pressure difference in a case other than one in which pressure in the hydraulic chamber is lowered by discharging the oil from the other chamber, in case the pressure in the hydraulic chamber is lowered by discharging the oil to the other chamber.

A hydraulic control system stably controls pressure in a hydraulic chamber of a pulley accommodating a belt by controlling a feeding valve and a discharging valve. The control system reduces a control amount of the feeding valve to be smaller than that calculated based on a pressure difference in a case other than one in which pressure in the hydraulic chamber is increased by delivering oil to another chamber, in case the pressure in the hydraulic chamber is increased by delivering the oil to the other chamber. The control system reduces a control amount of the discharging valve to be smaller than that calculated based on the pressure difference in a case other than one in which pressure in the hydraulic chamber is lowered by discharging the oil from the other chamber, in case the pressure in the hydraulic chamber is lowered by discharging the oil to the other chamber.

A drive clutch having a compressible torque transfer mechanism configured to transfer torque from an engine or motor to a moveable sheave and configured to reduce wear on components of the drive clutch by eliminating sliding contact between surfaces to transfer torque and change the gear ratio. The torque transfer mechanism increases efficiency and reduces wear and may comprise a torque bellows, which is configured to transfer torque from the engine to the moveable sheave upon radial compression of the torque bellows. Sliding blocks and corresponding slide tracks are concentrically positioned between the moveable sheave and the shift plate and centrifugal force provides a force for linear movement for the sliding blocks, which results in movement of the moveable sheave and the cover, which can act to compress the torque bellows. This configuration reduces costs because precise machining is not needed and reduces premature wear and tear on the drive clutch.

A drive clutch having a compressible torque transfer mechanism configured to transfer torque from an engine or motor to a moveable sheave and configured to reduce wear on components of the drive clutch by eliminating sliding contact between surfaces to transfer torque and change the gear ratio. The torque transfer mechanism increases efficiency and reduces wear and may comprise a torque bellows, which is configured to transfer torque from the engine to the moveable sheave upon radial compression of the torque bellows. Sliding blocks and corresponding slide tracks are concentrically positioned between the moveable sheave and the shift plate and centrifugal force provides a force for linear movement for the sliding blocks, which results in movement of the moveable sheave and the cover, which can act to compress the torque bellows. This configuration reduces costs because precise machining is not needed and reduces premature wear and tear on the drive clutch.

A hybrid driving apparatus includes a forward-reverse switching mechanism, a transmission, an input path disposed on an output side of the forward-reverse switching mechanism, and a motor connected to the input path.