Abstract: A coasting clutch and a gear system with a coasting clutch include mutually facing first and second clutch members. The coasting clutch is arranged to operate in an engaged position, wherein the first and second clutch members are axially in mesh and rotating with the same speed, or overrunning and rotating with different speeds. The coasting clutch includes a coasting mechanism arranged to operate the coasting clutch into a coasting position when the clutch is overrunning. In the coasting position, the first and second clutch members are axially arranged further from each other than in the engaged position.

Abstract: A pin assembly for use in a planetary gear including a pin including a cylindrical side wall defining a central bore that extends from a first end to a second end of the pin along its longitudinal center axis, an inlet bore, and a first annular groove that extends radially outwardly into the side wall of the pin adjacent the first end. A first cylindrical plate includes a first side wall, a second side wall, and a cylindrical outer wall extending therebetween, the first plate being disposed within the first annular groove of the pin, wherein a width of the first plate in a direction parallel to the longitudinal center axis is less than a width of the first annular groove in the direction parallel to the longitudinal center axis so that the first plate is axially slidable within the first annular groove.

Abstract: A pipette quickset volume adjustment mechanism having various modes of operation. The quickset volume adjustment mechanism provides for easy selection between at least a direct drive mode, and a speed multiplying mode that hastens pipette volume changes. The quickset volume adjustment mechanism incorporates a planetary gearbox that is appropriately and selectively settable to produce the various modes of operation.

Abstract: A power tool includes a motor with a drive shaft being capable of rotating around a first axis, a housing for containing the motor, an output shaft for outputting torque, a transmission mechanism for transferring power between the drive shaft and the output shaft, and an adjusting device for adjusting ratios between the drive shaft and the output shaft. The transmission mechanism includes a first planet gear assembly including a first planet gear and a first planet carrier, a second planet gear assembly including a second planet gear and a second planet carrier, and a ring gear with inner teeth. The first and second planet gears can be engaged with the ring gear and the first and second planet gears are engaged with the first and second sun gears, respectively.

Abstract: This invention relates to a fastener driving device including a variable ratio gear mechanism that enables the ratio of the rotation of the handle to the rotation of a driving bit extending from the handle to be varied to allow the bit to rotate at different speeds from the handle. The device includes a gear mechanism disposed within a housing for the device that includes a locking member. The locking member can be engaged with the gear mechanism to lock the gear mechanism in a configuration for a 1:1 gear ratio. The locking member can be moved with regard to the gear mechanism to provide an increased gear ratio for the gear mechanism when desired.

Abstract: A hand tool adapter capable of increasing output torque or rotational speed has a main body. The main body has a through hole. The through hole is provided with a first rotary seat and a second rotary seat. The through hole of the main body is provided with an annular toothed portion. The first rotary seat is provided with a plurality of gears to mesh with the annular toothed portion. The second rotary seat is provided with a gear axle to mesh with the gears. By the speed-changing principle of the planetary gear, the first rotary seat is selected as the input axle to increase the output rotational speed of the second rotary seat, or the second rotary seat is selected as the input axle to increase the output torque of the first rotary seat.

Abstract: A ratchet wrench includes a center gear connected to the top of the ratchet wheel and a disk is mounted to the center gear. Three planet gears is connected to the disk and engaged with the center gear. A rotary member is rotatably mounted to the disk and has inner teeth engaged with the planet gears. Two pawls are respectively engaged with the disk and the ratchet wheel. A shank extends through the rotary member, the disk, the center gear and is connected to the ratchet wheel. When rotating the rotary member, the planet gears rotate the center at high speed, and the center gear rotates the ratchet wheel to quickly rotate the object to be tightened or loosened.

Abstract: The present invention provides a screwdriver which includes a shaft, a handle and a speed increasing mechanism, in which the speed increasing mechanism includes a central axle connected to the shaft and provided with a toothed part on its periphery, a first member is disposed in the interior of the handle, at least one gear is connected to the first member, and a geared sleeve is sheathed outside the gear, in which the inner side of the geared sleeve has teeth on corresponding positions, engaging with the gear which is disposed at a side part of the central axle and is engaged with the toothed part of the periphery of the central axle. The present invention also includes a locking mechanism addressing the problem of torque being not high.

Abstract: A torque-limiting assembly for a surgical powertool has an input shaft and an output shaft. Two relatively rotatable parts of the assembly are configured to be locked against relative rotation by at least one shearable piece for torque transfer between the input shaft and the output shaft up to a torque limit. The assembly further comprises at least one shear off structure rotationally fixed to one of the two relatively rotatable parts for shearing off a portion of the at least one shearable piece above the torque limit so as to unlock the two relatively rotatable parts for relative rotation.

Abstract: A dual-setting rotating system selectively provides unidirectional rotation to a drive shaft. Along with the drive shaft, the system includes a primary ratchet gear fixedly disposed on the drive shaft and configured to motivate the drive shaft in principal rotation. A secondary ratchet gear is coaxial with the primary ratchet gear and rotatably attached about at least a portion of the drive shaft. A pinion gear is axially-aligned with the drive shaft and operably engaged with the secondary ratchet gear and a shaft gear to motivate the drive shaft during retrograde rotation. The shaft gear is rigidly attached to and coaxial with the drive shaft. A clutch plate spans the primary and secondary ratchet gear while a main body encloses at least a portion of the clutch plate.

Abstract: The present invention provides a wrench, which comprises a working part and a handle, the working part includes a main axle perpendicular to the handle and mutually cooperated bidirectional pawl and ratchet wheel, in which the ratchet wheel is arranged so as to be caused by the handle, the bidirectional pawl is arranged to rotate the main axle and has a first pawl and a second pawl which are opposite to the clutch direction between the ratchet wheel, the working part also includes a direction switching mechanism for setting clutch direction of the bidirectional pawl and the ratchet wheel; the direction switching mechanism is arranged such that a first pawl and a second pawl are engaged with the ratchet wheel selectively, such that when handle is rotated in the direction set by the direction switching mechanism, the ratchet wheel is engaged with the bidirectional pawl, then rotates the main axle; when the handle is rotated in the direction opposite to the direction set by the direction switching mechanism, the

Abstract: A roll control device for a vehicle curtain has a unidirectional transmission device and a damping assembly. The unidirectional transmission device has a gear base, multiple planet gears and a transmission wheel. The gear base has a connecting segment, a driving segment formed on a side of the connecting segment and an axle. The driving segment has multiple receiving recesses and multiple limiting segments. The planet gears are mounted rotatably and slidably in the receiving recesses respectively and are selectively limited by the limiting segments respectively to rotate with the gear base. The transmission wheel is rotatably combined with the gear base, encloses the planet gears and has a transmission gear. The damping assembly is connected with the unidirectional transmission device and has a driven gear and a damper. The driven gear engages the transmission gear on the transmission wheel. The damper is connected with the driven gear.

Abstract: A wrap-around braking device for a planetary gear train, having at least one wrap-around element, with first and second cam devices, and is designed to wrap around at least one ring gear of the planetary gear train for braking engagement. A shift fork, which can be moved in the axial direction of the shift fork and which has first and second actuating elements that act oppositely in the axial direction and which is mounted in a rotationally fixed manner in a housing that has at least first and second stops in the axial direction. For braking engagement on the ring gear, which rotates in a first rotational direction, the shift fork can be moved in a first axial direction such that the first actuating element interacts with the first cam device, while the second stop opposite the first actuating element in the axial direction interacts with the second cam device.

Abstract: In an outboard motor having a power transmission mechanism for transmitting power of an engine to a propeller, the power transmission mechanism has a transmission ratio changing unit having a planetary gear train including a sun gear, planetary gears, and an internal gear. The internal gear is connected to an input side shaft on the engine side. The planetary gears are connected to an output side shaft on the propeller side. The sun gear is connected to a stationary portion via a one-way clutch. The planetary gears and the internal gear and/or the sun gear are connected by an on-off clutch. When the on-off clutch is disengaged, the one-way clutch is engaged and the speed from the input side shaft is outputted from the output side shaft with a reduced speed. When the on-off clutch is engaged, the speed from the input side shaft is outputted from the output side shaft with the same speed.

Abstract: A bicycle hub transmission includes a hub axle, a driver, a hub shell, a power transmission mechanism and a shift mechanism. The driver and the hub shell are rotatably supported relative to the hub axle. The power transmission mechanism is disposed between the driver and the hub shell to selectively transmit rotational power from the driver to the hub shell through one a plurality of power transmission paths. The shift mechanism operatively couples the power transmission mechanism to select a power transmission path. The downstream planetary gear unit includes a planetary gear carrier that meshes with planetary gears of the upstream planetary gear unit or with a linking member coupled to the planetary gears of the upstream planetary gear unit. The planetary gear carrier of the downstream planetary gear unit is coupled with a brake unit to transmit a reverse rotational power from the driver to the brake unit.

Abstract: An enclosed bicycle drivetrain is provided that produces a range of drive ratios suitable for any riding purpose. The enclosure of substantially the entire drivetrain is made practical by the synergistic cooperation of a planetary drive system using a single chain ring and a streamlined rear derailleur system that separates the tensioning and chain guiding functions of a conventional rear derailleur, allowing the rear derailleur components to remain substantially within the shadow of the outer perimeter of the bicycle frame. The planetary drive system is provided with a unique compound pawl that may be easily disengaged from a planetary ratchet member under full riding loads by the application of a small force to destabilize the pawl. A unique shift buffer mechanism cooperates with the rear derailleur system to buffer and store up to the full range of available shift commands.

Abstract: Provided is a forced speed changing apparatus of bicycle. The forced speed changing apparatus of bicycle is characterized in that a pressure member is disposed at the pawl controlling ring 15, and a spline groove 27, 27a and 27b is formed at an inner circumference of the carrier 20 so that the pressure member is moved by rotation of the carrier 20 so as to press the pawl 12, 13 and to release engagement between the pawl 12, 13 and the sun gear 23, 24. Therefore the function and operation of the forced speed changing apparatus of bicycle can be enhanced.

Abstract: An enclosed bicycle drivetrain is provided that produces a range of drive ratios suitable for any riding purpose. The enclosure of substantially the entire drivetrain is made practical by the synergistic cooperation of a planetary drive system using a single chain ring and a streamlined rear derailleur system that separates the tensioning and chain guiding functions of a conventional rear derailleur, allowing the rear derailleur components to remain substantially within the shadow of the outer perimeter of the bicycle frame. The planetary drive system is provided with a unique compound pawl that may be easily disengaged from a planetary ratchet member under full riding loads by the application of a small force to destabilize the pawl. A unique shift buffer mechanism cooperates with the rear derailleur system to buffer and store up to the full range of available shift commands.

Abstract: A transfer case comprising a rotational input member, a rotational output member, a rotational planetary gear portion operatingly engaged between the input member and the output member, a moveable cam member selectively engagable with the planetary gear portion, whereby the rotation of the planetary gear portion is stopped when the cam member is engaged with the planetary gear portion, the rotational direction of the output member is in the same direction as the input member when the cam member is not engaged with the planetary gear portion, and the rotational direction of the output member is opposite the rotational direction of the input member when the cam member is engaged with the planetary gear portion.

Abstract: Variable motion control devices and methods of use. The devices and methods relate to providing an output, such as a rotational shaft output, transmitted from a rotational shaft input, with the output varying based on a control input. The devices and methods are used, for example, to provide a variable output for use with a compressor, power take off, or transmission or differential application. To provide the variable output, the devices and methods include use of mechanical component systems, such as spur gear planetary systems, ring gear planetary systems, bevel gear arrangements, or combinations of such features. The control input is implemented, for example, by arrangements of bindably meshed gears, tension between pulleys joined by belts or similar arrangements of sprockets and chains, use of magnetic clutches, hydraulic or pneumatic controls, or braking devices.

Abstract: Disclosed is an automatic speed changing device in which speed is automatically changed according to a predetermined amount of rotation without user's arbitrary manipulations.

Abstract: Variable motion control devices and methods of use. The devices and methods relate to providing an output, such as a rotational shaft output, transmitted from a rotational shaft input, with the output varying based on a control input. The devices and methods are used, for example, to provide a variable output for use with a compressor, power take off, or transmission or differential application. To provide the variable output, the devices and methods include use of mechanical component systems, such as spur gear planetary systems, ring gear planetary systems, bevel gear arrangements, or combinations of such features. The control input is implemented, for example, by arrangements of bindably meshed gears, tension between pulleys joined by belts or similar arrangements of sprockets and chains, use of magnetic clutches, hydraulic or pneumatic controls, or braking devices.

Abstract: A two-speed transfer case includes a planetary gear assembly, and a shift sleeve that is used for selecting either the reduced speed gear ratio, in which the torque from the input is transferred though the planetary gears, or the direct drive speed ratio, in which the input and output shafts are coupled directly together. The carrier of the planetary gear assembly is equipped with a surface that is capable of receiving a band brake that is disposed thereabout. A lever composed to two pieces, a brake apply arm and a cam follower, applies the brake band, and in doing so controls retardation of the planet carrier, controlling the speed of the carrier, and thus, controlling the output of the planetary gear assembly.

Abstract: A multi-speed transmission assembly for a rotary power tool. The transmission assembly includes a plurality of transmission stages, with at least two of the transmission stages employing a movable reduction element that permits the transmission stage to be operated in an active mode and an inactive mode. The movable reduction elements are coupled to a switching mechanism that switches the reduction elements in a predetermined manner to provide at least three-gear reduction or speed ratios.

Abstract: A synchronized shift arrangement is disclosed for shifting a planetary-type gear reduction assembly from a low-range operating mode to a high-range operating mode. This arrangement is particularly adapted for use in vehicular power transfer devices, such as four-wheel drive transfer cases, for allowing the vehicle operator to shift "on-the-fly" from a four-wheel low-range drive mode to a four-wheel high-range drive mode without the need of stopping the motor vehicle.

Abstract: A hydrostatic transaxle is disclosed of the type having a central manifold (13) and right and left motor axle assemblies (15, 17). Each motor axle assembly includes a fluid motor (35) and a speed reduction gear set (51). The manifold defines a pair of aligned openings (81R, 81L) and disposed therein is a pair of elongated brake actuation members (83R, 83L), each member being axially moveable in its opening away from a central reference plane (RP). A cam means (95) defines right and left cam surfaces (107R, 107L) engaging the brake actuation members. Movement of the cam means forces the actuation members axially outward, until each engages friction pad (109), providing braking of a reaction plate (115) between the friction pad and a back up plate (119). The disclosed braking arrangement is simple and inexpensive, and achieves braking upstream of the reduction gear set, thus requiring less braking torque than would be required in the case of a conventional wheel brake. Also disclosed is an embodiment (FIG.