Wheelchair lift with single lifting mechanism

Details Wheelchair lift with single lifting mechanism Wheelchair lift with single lifting mechanism

1998-03-04

2000-07-18

Krizek, Janice L.

Material or article handling

Self-loading or unloading vehicles

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

414921, B60P 144

Patent

active

060898178

ABSTRACT:
A wheelchair lift having a single piston and cylinder mechanism for both raising and lowering the wheelchair lift and for pushing the wheelchair lift out to an operating configuration from underneath the vehicle and pulling the wheelchair lift back to a storage configuration underneath the vehicle. The wheelchair lift includes a lift mechanism having a first arm hingedly engaged to a wheelchair platform and a second arm hingedly engaged to a base. The single piston and cylinder mechanism draws these first and second arms up and down into operating and storage positions. A third arm is pivotally engaged between the first and second arms and a fourth arm is pivotally engaged between the platform and the base. The third and fourth arms swing parallel to each other to raise and lower the platform. The lift further includes a lock for locking the platform to the base for storage. The lift still further includes a safety roll stop for the edge of the wheelchair platform where the wheelchair rolls on to and off the platform.

REFERENCES:
patent: 3263835 (1966-08-01), Lugash
patent: 3893576 (1975-07-01), Casady
patent: 4124130 (1978-11-01), Rohrs et al.
patent: 4134504 (1979-01-01), Salas et al.
patent: 4711613 (1987-12-01), Fretwell
patent: 4958979 (1990-09-01), Svensson
patent: 5040936 (1991-08-01), Rhea
patent: 5253973 (1993-10-01), Fretwell
patent: 5542811 (1996-08-01), Vartanian
patent: 5556250 (1996-09-01), Fretwell et al.

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