Wheelchair lift

Details Wheelchair lift Wheelchair lift

1996-02-14

1997-04-29

Noland, Kenneth

Elevator, industrial lift truck, or stationary lift for vehicle

Stairway assist for individual or minor barrier lift for...

Mounted adjacent stairway for travel parallel thereto

414921, B66B 908

Patent

active

056240090

ABSTRACT:
A wheelchair lift system enabling wheelchair accessibility between stair levels for persons incapable of traversing stairs under their own power. The key of the invention is a free-rolling, wheeled platform suspended between two arcuate tracks which are lifted and lowered by synchronized, reversible, worm-gear drive mechanisms. The platform and tracks are mounted on a frame in which also resides peripheral equipment needed to raise and lower the system. A seven-foot-high portal frame supports the drive mechanism which comprises pivoting, worm-gear type drive motors, turning long worm-gears extending vertically downward from the top of the frame to the floor and engaging pivoting worm-gear heads that are attached to the arcuate tracks, while allowing normal access to the stairs.

REFERENCES:
patent: 3229788 (1966-01-01), Booth
patent: 4155468 (1979-05-01), Royce
patent: 4674601 (1987-06-01), Benjamin
patent: 4904916 (1990-02-01), Gisske et al.

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