Reduced shear assembly for recline seat back of a wheelchair

Details Reduced shear assembly for recline seat back of a wheelchair Reduced shear assembly for recline seat back of a wheelchair

A - Human Necessities

61

G

A61G 5/10 (2006.01) A61G 5/00 (2006.01) A61G 5/12 (2006.01) A61G 5/04 (2006.01)

Patent

CA 2208991

A reduced shear reclining seat back assembly employs a single rotary actuator for reclining a seat back relative to a seat portion and controlling movement of a seat back member in response to the reclining operation. A rotary actuator includes a first arm pivotally secured to the seat back, preferably through a link which is connected to the movable back member. A second arm of the actuator is pivotally secured to the seat portion. As the angle between the first and second arms decreases, the seat back reclines and the movable seat back member is drawn toward a seat pivot axis. Likewise, when the angle between the arms increases, the seat back is brought to an upright position and the movable seat member travels away from the seat pivot axis.

La présente invention porte sur un dossier inclinable à cisaillement réduit. L'ensemble présente un unique actionneur rotatif pour assurer l'inclinaison du dossier de fauteuil par rapport au siège et pour commander le mouvement du dossier lors de l'inclinaison. L'actionneur rotatif comprend un premier bras fixé au dossier au moyen d'une articulation, de préférence par le biais d'un lien relié au dossier mobile. Un deuxième bras est fixé au siège au moyen d'une articulation. Au fur et à mesure que diminue l'angle compris entre le premier et le deuxième bras, le dossier s'incline et l'élément mobile de ce dossier est attiré vers l'axe d'articulation du siège. De même, lorsque l'angle compris entre les bras augmente, le dossier se met en position verticale et l'élément de siège mobile s'éloigne de l'axe d'articulation du siège.

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