Stowed platform wheelchair lifter

A - Human Necessities – 61 – G

Patent

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Details

A61G 3/06 (2006.01) B60P 1/44 (2006.01) B66B 9/08 (2006.01) B66F 7/06 (2006.01)

Patent

CA 2253270

A wheelchair platform free fall control system having a tension means biasing together the long (20, 20') and short arms (24, 24') of a lever arm assembly (14, 14') that keeps the lever arm slide block (42, 42') in contact with a lifting arm (30, 30') during gravity-down deployment of the platform (12) from an over-vertical stowed position to a horizontal transfer position. The tension means may be one or more springs (60, 60') and a compression means may be a gas spring (52). The forces are preselected to provide an over-vertical assist while keeping the slide block (42, 42') in contact with an arm (20, 20') of the lifting assembly (14, 14').

Ce système de commande d'une descente libre d'une plate-forme pour fauteuil roulant présente un élément de tension sollicitant ensemble à la fois des bras longs (20, 20') et courts (24, 24') d'un ensemble leviers (14, 14') servant à maintenir le bloc de coulissement (42, 42') de ces leviers en contact avec un bras de levage (30, 30'), pendant le déploiement vers le bas, par gravité, de la plate-forme (12), d'une position repliée allant au-delà de la verticale vers une position de transfert horizontale. L'élément de tension peut être constitué par un ou plusieurs ressorts (60, 60'), des moyens de compression pouvant être constitués par un ressort à gaz (52). Les forces sont préalablement choisies afin d'aider au placement la plate-forme au-delà de la position verticale et de maintenir en même temps le bloc de coulissement (42, 42') en contact avec un bras (20, 20') de l'ensemble levage (14, 14').

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