Wheelchair

Details Wheelchair Wheelchair

1978-10-27

1980-11-04

Mitchell, James C.

Chairs and seats

Movable bottom

Tiltable

297320, 297DIG4, 297DIG10, A47C 102

Patent

active

042316146

ABSTRACT:
An improved wheelchair for mechanically assisting in moving a disable person between a sitting and a standing position. A method and apparatus for automatically coordinating the movements of the feet, lower-leg, thigh, seat and back, including the initial pivotal raising of the lower-leg and foot followed by a reversal of direction as the upper-leg and back commence pivotal movement to achieve preliminary alignment of the leg prior to achieving complete upright alignment of the entire body. A lever mechanism having a forward lever arm coupled to a lower-leg support through a cam, and a rearward lever arm coupled to a seat and/or back through a delayed-action channel member.

REFERENCES:
patent: 3640566 (1972-02-01), Hodge
patent: 3807795 (1974-04-01), Weant
patent: 3964786 (1976-06-01), Mashuda
patent: 4076304 (1978-02-01), Deucher

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