Patent ID: 7815004
Filing Date: 2010-10-19
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 a pair of rollers rotatably mounted to said platform, wherein said pair of rollers are in independent rotatable communication with a respective one of said pair of oversized wheels using a gear and linkage and wherein said pair of 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 said pair of rollers resulting in the rotation of said respective oversized wheel; and at least one castor attached to the rear portion of said platform at a position behind said pair of oversized wheels, wherein the platform includes a cover plate above the at least one castor to provide support for a wheel of the wheel chair; whereby said apparatus is controlled by varying said rotation of each of said oversized wheels.