Chainless drive winch
OwnerRichard Paterson, Patrick Kellyinventors
Life of this patent
Estimating the term…
Abstract
A chainless drive winch is provided having a cable cylinder meshing with an orthogonal, cylindrical reduction gearing member. The reduction gearing member may be driven by, for example, an electric motor. A brake is provided operable only when the reduction gearing member is rotated is a direction to lower a load. Limit switches may be provided which are adjustable to alter the distance between them. A trigger finger moving between the limit switches is driven from the cable cylinder. The cable cylinder may be provided with a generally parallel roller to hold turns of cable on the cylinder. The roller may be independently biased at each end so that, when cable is partially unwound from the cylinder, the bias of the roller is enhanced on the remaining turns.
Claims20
A chainless drive winch comprising:
- a cable cylinder rotatable about an elongate axis, the cylinder comprising a cable winding portion adapted to receive or dispense cable, integral with a worm gear at one end;
- a reduction gearing member rotatable about a axis orthogonal to the cable cylinder, the reduction gearing member comprising a helical worm meshing with said worm gear, and a driven worm wheel;
- drive means having a helical drive worm on a drive shaft, the helical drive worm meshing with the driven worm wheel of the reduction gearing;
- a brake on the reduction gearing member and a uni-directional clutch adapted to allow unbraked rotation of the cable cylinder in one direction for a lifting operation and adapted to brake rotation of the cable cylinder in another direction for lowering.
A chainless drive winch comprising:
- a cable cylinder rotatable about an elongate axis, the cylinder comprising a cable winding portion adapted to receive or dispense cable, integral with a worm gear at one end;
- a reduction gearing member rotatable about a axis orthogonal to the cable cylinder, the reduction gearing member comprising a helical worm meshing with said worm gear, and a driven worm wheel;
- and
- a housing having opposed side walls, a top wall, a bottom wall and a front wall, in which the cable cylinder is supported in bearings in the opposed side walls and the reduction gearing member is supported between the top and bottom walls, the side, top, bottom and front walls being located with respect to each other by tabs of the top and bottom walls locatable in corresponding slots of the side and front walls and tabs of the front wall locatable in notches in front vertical edges of the side walls.
Dependencies are inferred from the claim text.