Staircase hoist for wheelchair users

Details Staircase hoist for wheelchair users Staircase hoist for wheelchair users

1996-05-06

1998-04-07

Friedman, Carl D.

Static structures (e.g., buildings)

Stepped; e.g., stair

With additional building feature

187200, 187201, E04F 1118

Patent

active

057350884

ABSTRACT:
A staircase hoist for wheelchair users includes a hoist carrier plate having a pair of brackets, two guide rails in slidable engagement with the pair of brackets to maintain the hoist carrier plate in a prescribed attitude, the guide rails being disposed vertically parallel to one another on a staircase wall along an angle of flight of the staircase, a drive motor on the hoist carrier plate, a plurality of arms radiating from a drive shaft rotated by the motor that rotate in opposition to the staircase wall, a tip of each arm having a roller, and a plurality of drive guides disposed between the guide rails at a prescribed distance from the wall that sequentially engage with the rollers on the arms. The drive shaft that rotates the arms is set at an angle to the staircase wall to prevent rollers that have terminated engagement with a drive guide coming into contact with other drive guides while being rotated around into position for the next engagement.

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patent: 5363771 (1994-11-01), Warren et al.
patent: 5476155 (1995-12-01), Nakatani et al.

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