Lifting assembly
OwnerRobin Sargentinventor
Life of this patent
Estimating the term…
Abstract
A pull chain moving assembly is designed to impart directional force on an endless-loop pull chain of a chain hoist. The assembly has a housing retaining a chain moving mechanism, which includes a chain pocket wheel and a pair of idler pulley assemblies mounted on opposite sides of the chain pocket wheel and adjacent thereto. Segments of the pull chain are received between the chain pocket wheel and the adjacent idler pulley guide, causing the pull chain to train through the chain moving mechanism. An electric motor rotates the chain pocket guide to facilitate movement of the pull chain and ease of lifting and lowering a load with the chain hoist.
Claims33
An assembly for moving an endless-loop pull chain of a chain hoist, comprising:
- a housing having a back cover and a detachable front plate;
- a chain moving mechanism mounted in the housing, the chain moving mechanism comprising a power source having an output shaft, a first sprocket gear having an exterior with radially outwardly projecting gear teeth which are aligned parallel to an axis of rotation of the first spur gear, the first sprocket gear being connected to the output shaft and receiving rotational force from the output shaft, a second sprocket gear having outwardly radially projecting teeth meshing with sprockets of the first sprocket gear, a chain pocket wheel having a central opening provided with a plurality of grooves, the chain pocket wheel being operationally connected to the second sprocket gear and receiving rotational force from the second sprocket gear, and a pair of idler pulley assemblies mounted on opposite sides of the chain pocket wheel, each of the idler pulley assemblies having an idler pulley shaft and a compression spring mounted on the idler pulley shaft, said chain moving mechanism training the pull chain between the chain pocket wheel and each of the idler pulley assemblies.
An assembly for moving an endless-loop pull chain of a chain hoist, comprising:
- a housing having a cup-shaped back cover and a detachable front plate;
- a pair of handles attached to opposite sides of the housing;
- a chain moving mechanism mounted in the housing, the chain moving mechanism comprising an electric power source having an output shaft, a first spur gear having an exterior with radially outwardly projecting gear teeth which are aligned parallel to an axis of rotation of the first spur gear, the first sprocket gear being rotationally connected to the output shaft, a second spur gear having outwardly radially projecting teeth meshing with sprockets of the first spur gear, a chain pocket wheel having a central opening provided with a plurality of grooves, the chain pocket wheel being operationally connected to the second spur gear and receiving rotational force from the second spur gear, and a pair of idler pulley assemblies mounted on opposite sides of and adjacent to, the chain pocket wheel, each of the idler pulley assemblies having an idler pulley shaft and a compression spring mounted on the idler pulley shaft, said chain moving mechanism training the pull chain between the chain pocket wheel and each of the idler pulley assemblies.
Dependencies are inferred from the claim text.