Wheel chair lift apparatus

Details Wheel chair lift apparatus Wheel chair lift apparatus

1982-02-08

1985-01-15

Spar, Robert J.

Material or article handling

Self-loading or unloading vehicles

Loading or unloading by other carrier or mover means, and...

414921, B60P 144

Patent

active

044936036

ABSTRACT:
The present wheel chair lift apparatus has a rotatable post at the front of a doorway in the side of a van. A pivotally mounted electric motor rotates this post through a pinion and gear drive at the lower end of the post. A carriage for the wheel chair lift platform is slidable up and down along this post. A vertical lead screw is coupled to the carriage through a ball nut and a lost-motion coupling. The lead screw is driven from an electric motor through gear wheels. The lead screw motor has an electric brake which prevents the screw from turning when the motor is stopped. The lift platform has a pivoted retainer lip at its outer edge which is pulled up before the lift platform can move up or down. Provisions are made for manually moving the platform in case of power failure.

REFERENCES:
patent: 3516559 (1970-06-01), Walter
patent: 3847292 (1974-11-01), Williams et al.
patent: 4133437 (1979-01-01), Gates
patent: 4281744 (1981-08-01), Koerber
patent: 4353436 (1982-10-01), Rice et al.

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