Power stand-up and reclining wheelchair

Details Power stand-up and reclining wheelchair Power stand-up and reclining wheelchair

1993-01-21

1994-11-22

Camby, Richard M.

Motor vehicles

Power

Electric

180 65, 180907, 280 30, 280657, B60K 102

Patent

active

053660366

ABSTRACT:
A wheelchair apparatus is provided for selectively positioning the operator from a sitting position to a standing position or a reclining position. The wheelchair apparatus includes a frame for supporting the operator's body in a reclined, sitting, and standing position. A single positioning actuator is used to selectively move the operator in the frame. A programmable controller controls the operation of both the chassis drive motors and the positioning actuator. The frame and chassis components are interconnected to achieve the desired positioning with a minimum number of electro-mechanical components. A sliding back frame is provided to eliminate shear forces on the back of the operator. The foot rest and frame are shifted towards the rear of the wheelchair when the operator is moved to a standing position such that the weight of the operator is over the axis of the large front wheels. The operator is still in a favorable position for access to items in front of the wheelchair, and the stability of the wheelchair is increased. The batteries are mounted on a slidable tray which is mechanically interfaced with the positioning of the main frame for additional weight distribution control. A shock absorber is attached to the back frame to minimize any instability in the back of the apparatus and to provide additional lifting force in the reclining position. A parallel linkage arm is provided for moving the control station to the side of the wheelchair.

REFERENCES:
patent: 4054319 (1977-10-01), Fogg, Jr. et al.
patent: 4390076 (1983-06-01), Wier et al.
patent: 4437537 (1984-03-01), Ausmus
patent: 4456086 (1984-06-01), Wier et al.
patent: 4809804 (1989-08-01), Houston
patent: 4948156 (1990-08-01), Fortner
patent: 5096008 (1992-03-01), Mankowski

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