Abstract: A lift assembly including a base, a drive mechanism, and a drum assembly adapted to be driven by the drive mechanism. The drum assembly includes first and second drum segments positioned adjacent each other, each drum segment including a small diameter portion, a large diameter portion, and a tapered portion between the small diameter portion and the large diameter portion. The lift assembly further includes first and second flexible drive elements at least partially wrapped around the small diameter portions of the first and second drum segments, respectively.

Abstract: A mechanical device for reducing the energy absorbed by an electric motor of a handling plant. The device includes a first rotating member moved by the motor of the handling plant. The device also includes a second rotating member connected to the first member through a first transmission apparatus. A third rotating member is connected to the second rotating member through a second transmission apparatus, which develops a transmission ratio equal to unity. The device further includes a fourth rotating member operatively connected to the rotor of the electric motor. The fourth rotating member and the third rotating member are connected through a third transmission apparatus, which develops a transmission ratio equal to unity. The device includes a sixth rotating member connected to a fifth rotating member through a fifth transmission apparatus. The sixth rotating member and the first rotating member are connected through a sixth transmission apparatus.

Abstract: An integrated hoisting system includes a base structural component (BSC) assembled on a structural aperture and containing an opening compatible with a structural aperture. The integrated hoisting system further includes a plurality of primary hoisting components affixed to the BSC, wherein each primary hoisting component is disposed in an opposite diagonal corner on said BSC, and further includes a winch drum and at least one lead sheave and a plurality of load path assemblies, each containing a plurality of sheaves. The system further includes a plurality of hoisting lines, a plurality of termination components affixed to said BSC, each termination component including a monitoring unit and a load cell assembly for terminating the hoisting line, and a device configured to control the operation of the integrated hoisting system.

Abstract: A winch formed of modular components can be reconfigured between different operational configurations. A number of different lengths and devices can be attached to the winch.

Abstract: A multi-function winch for handling multiple lines of the running rigging of a sailing yacht. The winch incorporates multiple winch drums capable of releasing, retrieving and storing working lines of the yacht. The multiple winch drums are mounted in an axially stacked relation on a single drive shaft. Individual ones of the drums can be engaged to be driven by the main shaft of the winch, while the others remain stationary or, where appropriate, free wheel and controllably release lines stored thereon. A rotatable selector lever, located at the top of the winch, is manipulated to engage a selected drum for driven operation. Level wind features can also be provided to assure neat and compact winding of retrieved lines.

Abstract: A theater rigging assembly having a beam, which is attached to structural support members of a theater or other performing arts venue. The assembly further includes a winch assembly and head block that can be positioned at any point along the beam and selectively fixed in position. The winch portion includes cables for raising and lowering battens or other loads. The head block includes head sheaves, which redirect the cables to loft sheaves that are selectively attached to the beam. The head sheaves are diagonally displaced to separate the cables. The winch portion includes a motor, a gear box, a drum and a brake. The brake includes a ratchet and two brake disks. It uses at least one friction surface that contacts at least one of the brake disks to cause a pawl to engage or disengage from the ratchet.

Abstract: The invention relates to a winch device with a first winch having a first winch drum and a second winch having a second winch drum. There is also a synchronizing device through which a rotation of the first winch drum can be synchronized with the rotation of the second winch drum. Further, a differential shaft with a first synchronous wheel and a second synchronous wheel is provided, said first synchronous wheel being connected via a first rotary connection device to a first drive and the second synchronous wheel is connected via a second rotary connection device to the second drive.

Abstract: The invention relates to a suspension arrangement for an elevator, which elevator preferably is an elevator without machine room and in which elevator the hoisting machine (4) is connected via a traction sheave (5) to hoisting ropes (3), by means of which the elevator car (1) is moved, and which hoisting machine (4) comprises at least a stator frame (26) secured to a mounting place in the elevator shaft and a traction sheave (5) and a rotor frame (25) forming a fixed assembly, which assembly is mounted with bearings so as to be rotatable with respect to the stator frame, and which hoisting machine (4) is secured to a stiffener (22) bracing the stator frame (26). The stiffener (22) comprises a support for mounting a bearing (23), said support being preferably situated below the traction sheave (5) and extending in a direction towards the hoisting machine, on which support is mounted with a bearing a freely rotating auxiliary diverting pulley (7).

Abstract: The invention provides a vertical lift mechanism (10) for a bunk bed within a recreational vehicle. The mechanism includes a lateral support assembly (14) that travels up and down in an upright frame assembly (34). The lifting force is provided by a drive unit (12) mounted to the support assembly (14) that winds and unwinds a flexible member (18) through a guide arrangement (68, 70, 72, 74, 76, 78, 80, 82) mounted to the support assembly (14). The flexible member (18) is preferably an assembly of cables, more preferably four primary cables (52, 54, 56, 58) each having one end attached to the ceiling of the vehicle and their opposite ends coupled together and linked to a leader cable (50) which is wound about the drive spindle (44). The primary cables (52, 54, 56, 58) travel around the guides (68, 70, 72, 74, 76, 78, 80, 82), which can be an arrangement of single and double sheaves or pulleys, to translate the winding force to vertical forces that raise or lower the support assembly (14).

Abstract: A elevator hoisting machine is provided with a stator mounting portion at which a stator core of a motor is mounted to a surface of a side opposite to a sheave in a sheave rotation centerline direction of the hoisting machine. A hat shape fixed frame member in which the stator mounting portion and a fixed main shaft that supports rotation of a rotor through a bearing are integrated. The elevator hoisting machine is characterized in that a brake device in which an inner radial surface of a cylindrical rotor mounting portion forms a braking surface. A motor is characterized in that the width of a magnet constituting a rotor is larger than the width of the stator core. The elevator hoisting machine is provided with the motor.

Abstract: An improved driving device (10) for the traction of cables or chains, in particular a device (1) for driving electric anchor winches (15), electric winches or windlasses (24), which are able to drive boat or ship anchors.

Abstract: A chain block with a drive motor (2) with a motor shaft (11), which is connected at the take-off side via a slip clutch (50) to a transmission input shaft (14), having a first gear (18a) and mounted in a housing (1) by pivot bearings (13, 13a), of an at least one-stage transmission (3). In order to create a simple design of chain block with a slip clutch, the transmission input shaft (14) is to be mounted floating in the pivot bearings (13, 13a) in order to change the frictional force of the slip clutch (50).

Abstract: A chain block with a drive motor (2) and with a transmission (3), connected to the drive motor (2) at the take-off side, with a transmission output shaft (4), on which a chain wheel (5) is rigidly arranged for pulling a chain. In order to create a compact chain block, the chain wheel (5) faces the drive motor (2) at its take-off end face (19) and the outer circumference of the chain wheel (5) reaches into the imaginary extension of the outer contour of the drive motor (2).

Abstract: A drum winch is replaced with a traction winch module. The traction winch module is mounted on and supported by the existing mooring winch frame of the drum winch. The traction winch module includes a traction frame, a front traction drum, and a rear traction drum. A portion of the drive system from the drum winch may be retained and used to drive the traction winch module. In one embodiment, the traction winch module is designed to mount between pillow blocks from the existing mooring winch frame. In addition, the power train and load-sensing systems from the existing drum winch may be used with the converted traction winch to drive the drive shaft and to provide the converted traction winch with tension information, respectively.

Abstract: A gear motor (1), with an electric motor (4) whose rotor (7) has a hollow shaft (8), drives, through at least one gear box (26) with at least one drive step, at least one load. For the purpose of compact configuration combined with low vibration, there is coaxially disposed in the hollow shaft (8) an output shaft (19) which can be shifted selectively by means of a first clutch (24) to the hollow shaft (8), and by means of a second clutch (16) via the gear box (26) to the hollow shaft (8). Preferably the clutches are configured as magnetic clutches, and again preferably the first clutch (24) is disposed for the direct shifting of the hollow shaft (8) to the output shaft (19) at the one end of the hollow shaft (8), and the second clutch (16) at the other end of the hollow shaft (8). The gear motor (1) is used preferentially for driving rotary parts in crystal pulling apparatus.

Abstract: A lifting apparatus (1) comprises a frame (30) and a carrier device (12) for carrying a load (2). The lifting apparatus includes two separate suspension devices (11a, b) which, by respective lines (13a, b) are connected to respective rotary drums (14a, b) for winding or unwinding of the line. A switching device (15a, b) is provided for each respective drum and is disposed, in a first position, to interconnect the drum with a prime mover (16) for rotation of the drum (14a, b) in one direction of rotation in which the line (13a, b) is wound up onto or unwound from the drum. As a rule, the second drum is disengaged from the prime mover (16) when this drives that drum on which the line is wound up or from which the line is unwound.

Abstract: A hoist drive for a double hoist carrying member having a hold hoist drum, a hold rope connected to the hold hoist drum and from which the carrying member is suspended, and a hold motor for rotating the hold hoist drum to raise and lower the carrying member. The hoist drive further includes a close hoist drum, a close rope connected to the close hoist drum and from which the carrying member is suspended, and a close motor for rotating the close hoist drum to raise and lower the carrying member. During raising of the carrying member, the hold and close motors are each supplied with a.c. power at different preselected frequencies. The hold and close motors each operate along a first pair of intersecting frequency to torque curves during a raising operation in which the hold motor curve is steeper than the close motor curve.

Abstract: An obstacle detector is disclosed, being designed to automatically brake a descending or ascending load suspended on at least two spaced cables, should an obstacle be encountered in the path of the load. The detector comprises at least two winch drums and a rotatable horizontal rod having at least two laterally-spaced levers projecting radially therefrom and inclined on opposite sides of the rod. One end of each cable is secured to a drum, passes through a pulley supporting the load and is secured to a corresponding lever at its other end. A change in the tension of one of the cables, due to an obstacle, results in a small rotation of the rod, thus activating an electric sensing device which effectively shuts down the motor driving the winch drums.