Abstract: A device is provided that attaches to a hub of a drive mechanism that utilizes a flat plate, shuttle enabled, engagement/disengagement mechanism to sequentially disengage a forward drive power and then engage a reverse drive power assembly which results in a reverse output of power to the drive mechanism. In a particular application, a device is provided that attaches to the hub of a motorcycle wheel that enables the normal forward drive mechanism to provide reverse power without changing the actual direction of the drive sprocket. An important aspect of the device of the present invention is that the reverse gear package when not in use is completely idle and has absolutely no effect on the forward drive components when not in use.

Abstract: A bicycle structure is provided with a crankset and a front derailleur. The crankset includes a plurality of chain rings, with a largest chain ring of the plurality of chain rings having a plurality of teeth with teeth bottoms interposed between adjacent ones of the teeth. The front derailleur includes a chain guide having a chain guide slot partially defined by a first chain engagement surface with a protruding part that protrudes outwardly from the first chain engagement surface into the chain guide slot. The protruding part is located away from the teeth bottoms of the largest chain ring in a radial outside direction of the largest chain ring by a prescribed distance in a range from eight millimeters to sixteen millimeters.

Abstract: A transmission controller for a continuously variable transmission system steadily returns a gear ratio toward the low-ratio range, even after a driving pulley has stopped during sudden deceleration. A control unit is provided which drives an actuator to move a driving-pulley movable half part to a position in the low-ratio range when a vehicle speed sensor detects the sudden deceleration of a body, a pulley number-of-revolution sensor detects stopping of the driving pulley, and then a gear ratio sensor detects that the gear ratio of the continuously variable transmission system has not returned to the low-ratio range where a sufficient acceleration is obtainable at the time of restart. Upon detecting a restart, the control unit presses the driving-pulley movable half part onto a V-belt to prevent sliding therebetween and thereby reduce a loss in the transmission of a driving force at the time of restart.

Abstract: A belt tensioner for a power transmission belt is provided that operates on an endless path and that utilizes asymmetric motion control. The belt tensioner has an arm with a belt engaging section and a drum section, a support member for securing the tensioner relative to the belt, where the arm pivots about the support member, and a tension spring that urges the arm to pivot about the support member in a first direction and urges the belt engaging section against the belt with a force to tension the belt. The belt tensioner further comprises a cavity between the arm and the support member and a bushing comprising a bowed flange positioned in the cavity.

Abstract: A continuously variable transmission has an endless V belt (15) running across a driving pulley (11) and a driven pulley (21), a transmission ratio changing mechanism for changing the running diameters of the belt around the pulleys radially in opposite directions to each other, and a tension-adjusting unit (50) for pressing the belt to obtain belt tension. The tension-adjusting unit (50) includes a tension roller (51) coming into pressure contact with the slack side of the belt (15) from outside, a swing arm (53) having an end rotatably supported on a transmission case (6), a link member (52) having an end rotatably supporting a shaft of the tension roller (51) and another end rotatably coupled with another end of the swing arm (53), and urging means (54, 55) for swingingly urging the swing arm (53) so that the tension roller (51) presses the belt (15).