A clutch unit includes: a first housing which is provided with a groove recessed inwards; a second housing which is inserted to the groove of the first housing and is provided with one or more arc portions to protrude along a circumference thereof on one surface thereof; one or more first roller portions which are positioned between the first arc portions; and a first rotation transfer portion which is inserted to the second housing and is rotated in accordance with rotation of a motor, wherein rotation of the first housing is controlled by the first rotation transfer portion and the first housing is not rotatable by external force when the first housing is attached to the first roller portions, and is freely rotatable by external force when the first housing is detached from the first roller portions.

A clutch unit, which transmits an operational force input to an operating lever to an output shaft member via an input-side clutch and an output-side clutch and outputs the operational force to a vehicle seat, includes a rotation suppressing member is provided which applies a rotational resistance force larger than a co-rotating force to between an input-side outer-ring member and a housing which is not rotated at a time of the returning operation of the operating lever, so as to suppress that the input-side outer-ring member is co-rotated by an input-side inner-ring member of the input-side clutch at the time of the returning operation of the operating lever.

A speed differential device of a double overrunning clutch device includes: a left input unit, an left output ring with cam, a right input unit, a right output ring with a cam; and double overrunning clutch device between the left output ring and the right output ring. The double overrunning clutch device includes a left clutch unit and a right clutch unit; and a synchronous unit is installed between the left clutch unit and the left output ring, and between the right clutch unit and the right output ring. The synchronous unit has a left synchronous ring and a right synchronous ring, but rotate independently; an inner surface of each of the left synchronous ring and the right synchronous ring is formed with teeth or tilt teeth; and an outer annular surface of each of the left synchronous ring and right synchronous ring is formed with teeth or tilt teeth.

A clutch unit includes a lever-side clutch part to control transmission of rotational torque input through a lever operation, and a brake-side clutch part to transmit the rotational torque from the lever-side clutch part to an output side, and interrupt rotational torque from the output side. The brake-side clutch part includes an outer ring constrained in rotation, an output shaft configured to output the rotation, a cage arranged between the outer ring and the output shaft to receive the rotational torque from the lever-side clutch part, and a cylindrical roller to control the interruption of the rotational torque from the output shaft and the transmission of the rotational torque input from the cage through engagement and disengagement between the outer ring and the output shaft.

A seat adjuster having a fixed part (12), a drive element (26), an output element (22, 24), a clamping body coupling arrangement (16) by means of which a back and forth movement of the drive element (22, 24) out of a neutral position and back into the neutral position is converted into a continued movement of the output element (22, 24) in a uniform direction of rotation, and a releasable locking device for locking the output element (22) in a form-fitting manner on the fixed part (12), characterized in that the locking device is formed by a locking ring (74) which is axially displaceable between a locking position, in which it is non-rotatably coupled to the output element (22), and a release position, and cam surfaces (82, 84) are formed on the locking ring (74) and the drive element (26), which cam surfaces are complementary to one another and translate a rotation of the drive element (26) away from the neutral position into an axial movement of the locking ring (74) into the released position.

The enclosed invention is a new one way clutch where linear or rotary motion between two bodies is transmitted in only one direction by one or more links moving in one of the bodies and connected with the other by friction or positive engagement, the link(s) plays the role of a follower to the cam surface on the other body. The link(s) could be rigid or flexible or in combination of both, and its contact is insured by springs which could be separate or part of any of the mechanism bodies. The link(s) causes the two bodies to cease and move together in the driving direction, and to release in the opposite free movement direction. One of the two bodies can be omitted and replaced by a part of the using machine. Links and cam lubes could be used in pairs. If links reset is needed, flexible elements or additional cam-follower mechanism can be used to avoid impact. Higher forces and torques can be transmitted with minimum backlash, surface fatigue and maximum indexing rate and service life.

A transmission for a manually operated wheeled machine includes an output shaft having a close-ended axial channel. A drive gear mounted on the output shaft includes an engaging groove. A ratchet is received in the channel and is in engagement with the engaging groove. A holder mounted on the output shaft includes a relief that receives the ratchet. A friction member applies radial friction to the holder to temporarily prevent rotation of the holder with the output shaft in a drive condition of the machine moving the ratchet into engagement with the engaging groove, and in the drive condition the drive gear and holder rotate with the output shaft. In a freewheeling condition of the machine the output shaft is stationary, and an overdrive of the drive gear disengages the ratchet from the engaging groove allowing for free rotation of the drive gear about the stationary output shaft.

A joint structure includes: an output side transmission shaft which rotates integrally with an output shaft of a speed increaser; an input side transmission shaft which rotates integrally with an input shaft of the speed increaser; a fixed housing; a bearing; and a one-way clutch which is fitted in the fixed housing. The one-way clutch integrally rotatably connects the output side transmission shaft and the input side transmission shaft under a condition where a rotation speed of the output shaft is higher than a rotation speed of the input shaft, and releases the connection between the output side transmission shaft and the input side transmission shaft under a condition where the rotation speed of the output shaft is lower than the rotation speed of the input shaft.

A one-way clutch includes a first rotator including an inner gear and configured to rotate on a first axis, a planetary gear configured to mesh with the inner gear and configured to rotate on a second axis that revolves around the first axis, a second rotator configured to rotate on the first axis and including a stopper configured to stop rotation of the planetary gear by engaging with the planetary gear, and an urging member configured to urge the planetary gear not to be brought in contact with the stopper in a state where the first rotator and the second rotator relatively rotate.

A transmission for a manually operated wheeled machine includes an output shaft having a close-ended axial channel. A drive gear mounted on the output shaft includes an engaging groove. A ratchet is received in the channel and is in engagement with the engaging groove. A holder mounted on the output shaft includes a relief that receives the ratchet. A friction member applies radial friction to the holder to temporarily prevent rotation of the holder with the output shaft in a drive condition of the machine moving the ratchet into engagement with the engaging groove, and in the drive condition the drive gear and holder rotate with the output shaft. In a freewheeling condition of the machine the output shaft is stationary, and an overdrive of the drive gear disengages the ratchet from the engaging groove allowing for free rotation of the drive gear about the stationary output shaft.