A torque transfer device has a ring gear and inner and outer planet gear sets, which may not be orbiting but rotating in fixed positions relative to a housing. One of the gear sets may comprise compound gears. There may also be a sun gear connected to a planet gear set. The sun gear may be an input and the ring gear an output for a reducing gear system to act as a torque amplifier. The gears may be tapered and there may also be an axial force applied to one of the gear sets to tighten the meshing between the tapered gears. One of the gear sets, for example a gear set to which an axial force is applied, may be floating.

A correction mechanism for a function of a movement for a timepiece, notably a display function, including a corrector, and at least one clockwork part, notably a gear wheel, in which the clockwork part can be driven by a movement cooperating with a flexible transmission end of a movement.

A correction mechanism for a function of a movement for a timepiece, notably a display function, including a corrector, and at least one clockwork part, notably a gear wheel, in which the clockwork part can be driven by a movement cooperating with a flexible transmission end of a movement.

An apparatus includes a crankshaft gear operatively coupled to an engine. An auxiliary gear is operatively coupled to the engine. An idler gear is operatively coupled to the engine, and is in meshed engagement with each of the crankshaft gear and the auxiliary gear. A ring dowel is fixedly coupled to an engine block. An idler hub has an inner surface and an outer surface. The inner surface is fixedly coupled to the ring dowel and the idler gear is rotatably coupled to the outer surface. The idler hub is eccentrically-shaped so that an idler gear centerline is offset from a ring dowel centerline so as to reduce a crankshaft backlash between the crankshaft gear and the idler gear relative to a nominal crankshaft backlash, and so as to substantially maintain an auxiliary backlash between the auxiliary gear and the idler gear relative to a nominal auxiliary backlash.

An apparatus includes a crankshaft gear operatively coupled to an engine. An auxiliary gear is operatively coupled to the engine. An idler gear is operatively coupled to the engine, and is in meshed engagement with each of the crankshaft gear and the auxiliary gear. A ring dowel is fixedly coupled to an engine block. An idler hub has an inner surface and an outer surface. The inner surface is fixedly coupled to the ring dowel and the idler gear is rotatably coupled to the outer surface. The idler hub is eccentrically-shaped so that an idler gear centerline is offset from a ring dowel centerline so as to reduce a crankshaft backlash between the crankshaft gear and the idler gear relative to a nominal crankshaft backlash, and so as to substantially maintain an auxiliary backlash between the auxiliary gear and the idler gear relative to a nominal auxiliary backlash.

Plate cylinder driving devices of a printing machine are provided with a drive shaft driving the plate cylinder, a drive helical gear fixed to the drive shaft, and an anti-backlash helical gear rotatably connected to the drive shaft and is biased by at least a spring towards a direction for preventing backlash. Both the drive helical gear and the anti-backlash helical gear are engaged with the main gear, and a plate provided with plural holes accommodating rollers is provided between the drive helical gear and the anti-backlash helical gear. Friction between the anti-backlash gear and the drive gear is reduced by a simple mechanism in the plate cylinder driving devices in a printing machine.

Plate cylinder driving devices of a printing machine are provided with a drive shaft driving the plate cylinder, a drive helical gear fixed to the drive shaft, and an anti-backlash helical gear rotatably connected to the drive shaft and is biased by at least a spring towards a direction for preventing backlash. Both the drive helical gear and the anti-backlash helical gear are engaged with the main gear, and a plate provided with plural holes accommodating rollers is provided between the drive helical gear and the anti-backlash helical gear. Friction between the anti-backlash gear and the drive gear is reduced by a simple mechanism in the plate cylinder driving devices in a printing machine.

An integrated gear and torsional vibration damper assembly (10, 20, 30, 30) includes a gear (11, 21, 31, 41) having a toothed portion (11a, 21a, 31a, 41a) and a torsional vibration damper (12, 22, 32, 42) supported on the gear (11, 21, 31, 41) for limited rotational and dampened movement relative to each other. The gear (11) may include a hub portion (11b), and the torsional vibration damper (12) may be supported on the hub portion (11b) of the gear (11). Alternatively, the gear (21) may include a hub portion (21b), an intermediate ring (23) may be supported on the hub portion (21b) of the gear (21), and the torsional vibration damper (22) may be supported on the intermediate ring (23). Alternatively, the gear (31) may include a toothed portion (31a) and a hub portion (31b) that extends radially inwardly from the toothed portion (31a) and has an opening (31c) extending therethrough, and the torsional vibration damper (32) may extend through the opening (31c). Alternatively, the gear (41) may include an inner circumferential surface that engages and supports an outer circumferential surface of the torsional vibration damper (41).

A bearing assembly comprising a rotating shaft, a rolling bearing and a scissors gear. The bearing assembly further comprises an axial retaining arrangement for the scissors gear onto the rolling bearing. A lock washer is arranged in a groove of an outer massive ring of the rolling bearing.

A bearing assembly comprising a rotating shaft, a rolling bearing and a scissors gear. The bearing assembly further comprises an axial retaining arrangement for the scissors gear onto the rolling bearing. A lock washer is arranged in a groove of an outer massive ring of the rolling bearing.