Wheelchair having apparatus for climbing stairs

A - Human Necessities – 61 – G

Patent

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Details

A61G 5/06 (2006.01) B62B 5/02 (2006.01) B62D 55/075 (2006.01)

Patent

CA 2192308

A wheelchair (12) having apparatus (14) mounted thereon which, when placed in a stair-climbing position, enables an occupant of the wheelchair (12) to turn the large wheels (21) of the wheelchair (12) in a reverse direction, thereby causing a plurality of sprockets (28, 32, 68) and chains (69) mounted thereon to climb a stairway (70). The occupant places the apparatus in stair-climbing position by utilizing a hand air pump (62) or other fluid pump mounted on the frame of the wheelchair to pump fluid into actuating fluid cylinders (48), thereby causing the pistons (86) and associated piston rods of the fluid cylinders (48) to extend and to place the apparatus in the climbing position. In this position the occupant may also cause the wheelchair to descend a stairway (70). By reversing a valve (104), the occupant may pump fluid into the fluid cylinders (48) to place the climbing apparatus in the stowed-away position, in which position the wheelchair (12) may be used as a normal wheelchair.

Un fauteuil roulant (12) est équipé d'un dispositif (14) qui, en position "marche d'escalier", permet à l'utilisateur du fauteuil roulant (12) de faire tourner les grandes roues (21) du fauteuil roulant (12) en sens inverse, de monter un escalier (70) grâce à une pluralité de pignons (28, 32, 68) munis de chaînes (69). L'utilisateur place l'appareil en position "marche d'escalier" au moyen d'une pompe à air manuelle (62) ou d'une pompe utilisant un autre fluide, montée sur le cadre du fauteuil roulant, afin de pomper un fluide dans des cylindres de commande (48). Ceci provoque l'extension de pistons (86) et de tiges de pistons associées des cylindres (48) actionnés par un fluide et permet de placer le dispositif en position "marche d'escalier". Dans cette position, l'utilisateur peut également descendre un escalier (70) avec son fauteuil roulant. En inversant une soupape (104), l'utilisateur peut pomper le fluide dans les cylindres (48) actionnés par un fluide afin de placer le dispositif en position de rangement, permettant d'utiliser le fauteuil roulant (12) comme un fauteuil roulant normal.

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