Driving system for passing fly-over obstacles by invalid chair

A - Human Necessities – 61 – G

Patent

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Details

A61G 5/06 (2006.01)

Patent

CA 2577971

Subject-matter of the invention is driving system for passing fly-over obstacles by invalid chair formed by seating structure (2) , wheels (8) arranged on both sides of the seating structure (2) and at least one front stabilising wheel (10) . The substance of driving system consists in that it is formed by arms (6) which are secured to the seating structure (2) on both of its sides and on which shafts of wheels (8) are arranged slidingly within two extreme positions, cranks (9) arranged on both sides of the seating structure (2), and rotary cross engagement members (3) which are arranged in rear part of the seating structure (2) on its both sides and have arms which are terminated with adhesive end pieces (4), wherein each of the cranks (9) is connected to respective rotary cross engagement member (3) arranged on the same side of the seating structure (2) through geared transmission (5) for transmission of rotary movement of the crank (9) to the rotary cross engagement member (3) , and the geared transmission (5) is provided with flap (7) for preventing reverse rotating of the crank (9) .

La présente invention a trait à un système de commande pour le passage d'obstacles surélevés par un fauteuil roulant constitué d'une structure de siège (2), de roues (8) disposées de chaque côté de la structure de siège (2) et au moins une roue stabilisatrice avant (10). Le système de commande se caractérise essentiellement en ce qu'il est formé par des bras (6) qui sont solidarisés à la structure de siège (2) sur ses deux côtés et sur lesquels des arbres de roue (8) sont disposés de manière coulissante dans deux positions extrêmes, des manivelles (9) disposées sur les deux côtés de la structure de siège (2), et des organes d'engagement croisés rotatifs (3) qui sont disposés dans la partie arrière de la structure de siège (2) sur ses deux côtés et présentent des bras qui sont terminés par des pièces d'extrémité adhésives (4), chacune des manivelles (9) étant relié à un organe d'engagement croisé rotatif (3) respectif disposé du même côté de la structure de siège (2) à travers une transmission à engrenages (5) pour la transmission de mouvement rotatif de la manivelle (9) à l'organe d'engagement croisé rotatif (3), et la transmission à engrenages (5) est munie d'un volet (7) pour interdire une rotation inverse de la manivelle (9).

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