A transmission assembly comprising an overrunning clutch assembly comprising a race having an inner annular contact surface, a plurality of sprags provided along the inner annular contact surface of the race, and defining a drive space, means for retaining the plurality of sprags along the inner annular contact surface of the race, a shaft having a drive portion with a drive diameter sufficient to cause rotation of the shaft in response to a rotation of the race when the drive portion is positio...

A transmission comprising: an input shaft, to which a power is transmitted from a prime mover; an output shaft for outputting the power to drive wheels; and a plurality of transmission mechanisms of different gear ratios for transmitting the power between the input shaft and the output shaft. A two-way clutch capable of switching a torque transmitting direction into a forward direction and a backward direction is interposed between at least any of the transmission mechanisms and the input shaft ...

A shiftable gear transmission has a plurality of gear pairs with free gears that can be engaged to one of the shafts by means of shift clutches and fixed gears that are permanently locked to one of the shafts. A start-up clutch arranged at the input side of the transmission couples and uncouples the torque flow. At least one of the shift clutches is a power-shift clutch with the ability to transmit a greater amount of torque than the other shift clutches. The start-up clutch and the power-shift ...

A transmission comprises a main shaft, a first countershaft parallel to the main shaft, a second countershaft disposed rotatably over the first countershaft, a third countershaft disposed coaxially with the first and second countershafts, first-third gear trains and a reverse gear train disposed rotationally between these parallel shafts, and a planetary gear train whose carrier is connected to the first countershaft, whose sun gear is connected to the second countershaft, and whose ring gear is...

A transmission has a gear system (34) which may be in the form of an orbit system (32, 35) or a planetary orbital spur system. The gear systems include a control gear (32) which is controlled to determine the drive ratio of the transmission. The control gear is controlled by a momentum control which includes a disc (23) and a slide (25) which carries a magnet (30) for selectivity allowing or preventing rotation of the disc (23) to in turn change the speed of rotation of the control gear (32). Al...

A transmission provided with an input shaft and an output shaft supported on a first axis so as to freely rotate. The transmission is also provided with a transmission eccentric shaft mounted on the input shaft so as to freely rotate, the eccentric shaft having a declination axis crossing the first axis with a predetermined angle; a transmission input plate mounted on the transmission eccentric shaft so as to freely rotate around the declination axis; and an output eccentric shaft supported on a...

A positioning means for a reverse shifting fork includes a toggle spring for biasing the reverse shifting fork toward one of a reverse position shown by a solid line and a neutral position shown by a dashed line with a dead point set as a boundary between the reverse position and the neutral position, and a stopper pin for stopping the reverse shifting fork in the reverse position and the neutral position against a biasing force of the toggle spring. The toggle spring is a torsional coil spring ...

A transmission includes a first shaft, a first rotational member coaxial with the first shaft for unitarily rotating with the first shaft, a first gear positioned to rotate relative to the first shaft, a first clutch mechanism for engaging and disengaging the first rotational member and the first gear, a second rotational member coaxially positioned with respect to the first shaft for unitarily rotating with the second rotational member, a second gear coaxially positioned with respect to the fir...

A transmission including an input cog assembly mounted to an input shaft and an output cog assembly mounted to an output shaft. The input and output cog assemblies include a plurality of varying diameter input and output cogs, respectively, arranged sequentially. A chain links a pair of input and output cogs for transmitting power from the input cog assembly to the output cog assembly. The chain, in operation, has a high-tension side and a low-tension side. A derailleur is engageable with the lo...

A motorcycle transmission (100) utilizes a shift fork (45), a shift collar (30) including a plurality of engagement teeth (30c) and a collar rib (30a) and a gear (34) (or one of the other six gears). The engagement teeth (30c) drive the teeth (34a) of the gear (34). A trap door (49), in combination with a threaded retainer (55), reduces axial play in shafts (37) and (75).