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US 9,623,891 B2Granted
Pallet jack power assembly
AssigneePower Handling, Incorporated
InventorGreg Newell
Life of this patent
Estimating the term…
Abstract
A pallet jack includes a forked frame and a jacking cylinder, and is supported at least in part by left and right steering wheels. A drive wheel may be located between the left and right steering wheels, with a center of each of the steering wheels and a center of the drive wheel located in a co-planar orientation. A motor provides power to the drive wheel.
Claims20
A pallet jack, comprising:
- a forked frame;
- a lifting cylinder to control elevation of the forked frame;
- left and right steering wheels to support the forked frame;
- a drive wheel, located between the left and right steering wheels;
- a motor to provide power to the drive wheel;
- a spring to limit a load carried by the drive wheel;
- and
- a steering wheel support bracket attached to the left and right steering wheels, wherein the left and right steering wheels are attached to respective left and right outside surfaces of the steering wheel support bracket.
5 more elements
A pallet jack, comprising:
- a forked frame;
- a lifting cylinder to control elevation of the forked frame;
- left and right steering wheels to support the forked frame;
- a drive wheel, located between the left and right steering wheels;
- a motor to provide power to the drive wheel;
- a spring to limit a load carried by the drive wheel;
- and
- a steering wheel support bracket configured to rotate about an axis going through the lifting cylinder and to support the left and right steering wheels with left and right axles, respectively.
5 more elements
A pallet jack, comprising:
- a forked frame;
- a lifting cylinder to control elevation of the forked frame;
- left and right steering wheels to support the forked frame;
- a drive wheel, located between the left and right steering wheels;
- a motor to provide power to the drive wheel;
- a spring to limit a load carried by the drive wheel;
- and
- a steering wheel support bracket to support the left and right steering wheels;
- a drive wheel support bracket to support the drive wheel;
- and
- at least one fastener to connect the drive wheel support bracket to the steering wheel support bracket, to rotate the drive wheel support bracket in response to rotation of the steering wheel support bracket, and to limit vertical movement of the steering wheel support bracket with respect to the drive wheel support bracket.
8 more elements
Dependencies are inferred from the claim text.