Lifting device for a vehicle

Details Lifting device for a vehicle Lifting device for a vehicle

1994-05-12

1996-05-21

Watson, Robert C.

Implements or apparatus for applying pushing or pulling force

Hoisting truck

Screw

254 89R, 254 98, B66F 714

Patent

active

055182208

ABSTRACT:
A lifting device for a load, such as a vehicle, includes a substantially vertical column forming a frame and a lifting device movable along the column under the action of a rotation control of a threaded ball driven by a driving unit, a reversible-type nut, such as a ball nut, for moving along the threaded rod, and a friction unit capable of creating, during a control of a down movement of the lifting device, a resistance torque of a modulus at least equal to a torque generated by the load resting on the lifting device. The lifting device also including a device capable of overcoming the friction unit during a control of an up movement of the lifting device and a load-dividing unit for transmitting, at a level of the friction unit, only a proportional part of the load lifted by the lifting device.

REFERENCES:
patent: 3958664 (1976-05-01), Perkins
patent: 4022428 (1977-05-01), Mantha
patent: 4173268 (1979-11-01), Nussbaum
patent: 4319738 (1982-03-01), Nussbaum

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