Patent ID: 8132637
Filing Date: 2012-03-13
Classification: A61G

Abstract:
1. An apparatus for use with a motorized wheelchair, comprising: a platform having a front and a rear portion capable of supporting a motorized wheelchair thereon; a pair of oversized wheels attached to said platform at said front portion; a pair of drive units, each of said drive units comprising at least two rollers rotatably mounted to said platform, wherein said at least two rollers are in independent rotatable communication with a respective one of said oversized wheels using a gear and linkage and wherein said at least two rollers are in independent rotatable communication with a respective drive wheel of said motorized wheelchair, whereby rotation of said respective drive wheel of said motorized wheelchair causes rotation of at least two rollers resulting in rotation of said respective one of said oversized wheels; at least one caster attached to said rear portion of said platform at a position behind said pair of oversized wheels, wherein said platform includes a cover plate above said at least one caster to provide support for a wheel of said wheelchair; and a roll bar affixed to said platform; whereby said apparatus is controlled by varying said rotation of each of said oversized wheels.