Erecting seat structure to assist invalids from seated to standi

Details Erecting seat structure to assist invalids from seated to standi Erecting seat structure to assist invalids from seated to standi

1977-01-24

1978-02-28

Zugel, Francis K.

Chairs and seats

Collapsible chair; i.e., relatively folding bottom, back,...

Laterally collapsible

297330, 297DIG10, 297437, A61G 500

Patent

active

040763048

ABSTRACT:
To provide for smooth simple operation of an erecting seat, a motor, through a reduction gearing, drives a shaft located transverse of the seat structure, or wheelchair, to the end points of which a crank drive is attached coupled to the seat, the crank drive being arranged to provide, upon erecting or lowering movement of the seat a nonlinear time-displacement function which is effectively sinusoidal, so that movement of the seat between the end positions starts slowly, then is accelerated, and then again slowly reaches the end position. Erecting movement can be assisted by springs, preferably located at either side of the seat.

REFERENCES:
patent: 909411 (1909-01-01), Hockney
patent: 2053852 (1936-09-01), Tracy
patent: 2927631 (1960-03-01), Andersson
patent: 3343871 (1967-09-01), Yates
patent: 3379450 (1968-04-01), Jones
patent: 3406772 (1968-10-01), Ahrent
patent: 3414324 (1968-12-01), Taylor
patent: 3589769 (1971-06-01), Bressler
patent: 3804460 (1974-04-01), Leffler
patent: 3851917 (1974-12-01), Horstmann

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