Abstract: A winch for securing a load to a vehicle a is disclosed. The winch includes a mounting bracket with opposed flanges. The winch further includes a drum extending along an axis between a first end and a second end. The drum is mounted relative to the opposed flanges so that the drum is rotatable about its axis. The winch includes a gear received on the drum and a worm configured to mesh with the gear so that a rotation of the worm causes a rotation of the gear. The winch further includes a clutch assembly between the drum and the gear. The clutch assembly is biasable between a first configuration in which the gear is fixed relative to the drum about the axis of the drum and a second configuration in which the gear is rotatable relative to the drum about the axis of the drum.

Abstract: Disclosed is a torque limiting and conical braking assembly for a power winch. In the process of outputting power by a power supply and transmitting the power to a reduction mechanism, a torque limit mechanism formed by a torque shaft, a friction pad, a brake pad, a disc-shaped elastic element, an adjustable positioning ring and a positioning screw ring and a conical braking mechanism formed by a brake block, a disc-shaped rim, a wedge block and a bump are installed, so that when the reverse torque produced by the carrying load of the power winch exceeds the torque bearable by the power supply, the power transmission is cut off immediately and a conical braking effect is produced to protect the transmission mechanism from being damaged.

Abstract: Disclosed is a torque limiter for a power winch, and a torque limit mechanism is installed for timely cut off the power transmission whenever the reverse torque generated by a carrying load exceeds a torque bearable by the power supply during a power transmission process for transmitting the power outputted from a power supply to a reduction mechanism through a long shaft, so as to prevent the power supply from being damaged by overload. The torque limit mechanism is formed by a torsion shaft, a friction plate, a brake pad, a disc-shaped elastic member, an adjustable positioning ring and a positioning screw ring.

Abstract: A door hoist includes a bracket, drive sprocket, ring gear, hub assembly, set of planetary gears, and governor shaft. The drive sprocket has a drive sprocket axis. The ring gear is fastened to the drive sprocket. The ring gear has a ring gear axis that is in alignment with the drive sprocket axis. The hub assembly includes a connector to receive a door drive shaft and secure the door drive shaft in a fixed rotational alignment with the hub assembly. The set of planetary gears is rotationally mounted to the hub assembly. The set of planetary gears is configured to mate with the ring gear. The governor shaft includes a sun gear, brake assembly, and link. The sun gear is configured to mate with the set of planetary gears. The brake assembly has an engaged position and a disengaged position. The sun gear is rotationally fixed relative to the bracket in response to the brake assembly being in the engaged position.

Abstract: An abrasive tool assembly (10) for treating a surface can include a universally pivoting pad assembly (12), an adaptor assembly (14) and/or a rotational device (16). The adaptor assembly (14) transfers a rotational force of the rotational device (16) to the pad assembly (12) includes a shaft section (32), a threaded section (34) and one or more tighteners (36). The shaft section (32) is secured to the rotational device (16). The threaded section (34) is secured to the pad assembly (12). Each tightener (36) moves between a loosened position and a tightened position wherein the tightener frictionally secures the pad assembly (12) against the threaded section (34) of the adaptor assembly (14). In one embodiment, the threaded section (34) is externally threaded. In another embodiment, the threaded section (34) is internally threaded. The shaft section (32) has a longitudinal axis (47).

Abstract: A motor winch, which is suitable as a sheet or halyard winch (11) for sailing yachts, etc., has an integrated electric or hydraulic drive. The motor (52) is integrated into the winch in such a way that it is located within the winch body and in particular within the winch drum (16). The motor brings about rotation of the winch drum through a multistage gear located in the winch foot (22), optionally assisted by an epicyclic gear (54). A manual operation with a winch crank is made possible by a winch crank nut (32) in the winch head (29). The manual driving shaft is past the somewhat eccentrically positioned motor. A reverse rotation or veering function can be provided in which following the disconnection of the drum locking mechanism, the motor is rotated back in braking manner with a controlled speed.

Abstract: A single mechanism mounted at the head of a winch has a double-selector function, allowing either 1st or 2nd ratio of drive to a drum to be selected upon initial rotation of the drive shaft. The mechanism is mounted coaxially with the drum and shaft and has coaxial inner and outer control buttons. Its body can be mounted on the end of the drive shaft from above.

Abstract: A winch has four drive trains of progressively increasing mechanical advantage between its drive shaft (3) and drum (8). If a selector (40) is engaged, rotation of the shaft in successively opposite senses will cause automatically engagement of the first third and fourth trains in sequence. If the selector (40) is not engaged and an override control (80,81,82) is appropriately set, the sequence second, third, fourth trains is followed. But the override may be locked so that only second and third trains are engaged alternately.

Abstract: An automatic three-speed winch comprising a base plate (1), a bollard (2) mounted for rotation relative to said base plate and carrying teeth (7) on its inner surface, arranged to cooperate through intermediate gears, with at least one driving gear (5, 6) around a central shaft (14) of the winch. An element (21, 22) is provided, which is mounted for rotation between a first and a second position about the central shaft (4) of the winch, which element carries three shafts (12, 14, 20), with a pair of gears (8, 11; 18, 19; 10, 13) being mounted for rotation about each shaft. The transition between the three different speeds takes place fully automatically by just changing the direction of rotation of the driving gear, without requiring any further operation on the winch.

Abstract: A selftailing capstan winch having a stationary shaft element which holds bearings for a winch drum and houses a driving shaft adapted to be crank handle driven from above. The shaft element has a fixed radial arm projecting outwardly about a drum top flange and into an upper annular rope groove. The driving shaft is mounted eccentrically in the stationary shaft element. The driving engagement with the drum is established by a pinion on the rotary shaft which simply engages an interior, relative broader toothed rim on the drum. With this arrangement, the drum is not rotated as quickly as the crank handle; however, the driving arrangement is simple and robust.

Abstract: A marine winch has a winch drum which is totally closed at the top, mounted on a base housing in bearings so as to rotate relative thereto on a vertical axis. The winch drum is driven in a given direction by pulling on a cord which is wound around a self-recoiling pulley in the base housing to thereby rotate the pulley and associated ratchet or clutch means and pinion gear which drives a gear ring on the winch drum. A sprag clutch is operatively connected between the winch and the base housing to prevent rotation of the winch drum in a direction opposite the given direction and to transmit load torque applied to the winch drum to a gear plate to automatically change gear ratios. An infinitely variable hydraulic drive means is also described.

Abstract: The disclosed speed-shift apparatus is for a sheet winch with a drum rotatably mounted on a base and can effect the shift of the speed-change ratio and the winch winding by one hand. A one-way transmission means having pawls and pawl-engaging grooves is provided between an input shaft and the winch drum. An interrupting member is rotatably carried by the base so as to selectively disengage said pawls from said pawl-engaging grooves and the interrupting means also has grooves for engaging said pawls.

Abstract: A variable speed winch including a uni-directional drum rotatable initially by the clockwise motion of a handle in a clockwise sense only. The winch also includes a gear selector including a control plate rotatable with respect to the drum into an extreme clockwise position wherein a first gear ratio is selected. The gear selector further includes ratchet structure, splined to a shaft rotatable by the handle. The ratchet structure is slidable axially with respect to the shaft under the influence of a cam structure responsive to the relative angular displacements of the handle with respect to the control plate. The control plate has recesses engageable by respective spring-loaded balls captively supported by the ratchet structure. The balls are adapted to enter and lock within the recesses in response to an anti-clockwise rotation of the handle sufficient to cause axial sliding of the ratchet structure, with respect to the shaft, under the influence of the cam structure.

Abstract: A manually powered multi-speed winch has an automatic drive disengagement upon drive reversal which is provided by an axially movable member in one drive train which in a first axial position is engageable for drive transmission through a pawl and ratchet unidirectional drive means. The drive means in its drive-transmitting condition prevents movement of the member away from that first position. Upon drive reversal the unidirectional drive means is ineffective either to transmit drive or to maintain the member in its first position and it moves axially to a second position in which the drive means are disengaged. The member is biased towards that second axial position but is manually movable to the first by a control button accessible at the outside of the winch. The button may be lockable to override the automatic disengagement.