Externally mounted track apparatus for a wheel chair

摘要

Apparatus for assisting travel across a travel surface not suitable for traverse by a wheelchair having a chassis, a seat mounted onto the chassis, a pair of manually rotatable drive wheels mounted about a rotation axis extending through the chassis, and a pair of castor wheels, wherein the apparatus for assisting travel includes tracked apparatus associated with the manually rotatable drive wheels, and apparatus for decouplably mounting the tracked apparatus onto the chassis, externally of the manually rotatable drive wheels.