Patent ID: 9487253
Filing Date: 2016-11-08
CPC Classification: A61G,B62B,B62D

Claim Text:
1. A step-climbing attachment for a wheeled chair, the attachment including: a wheel-mounting chassis for mounting wheels; a first wheel and a second wheel mounted on the wheel-mounting chassis for rotation about their axes; the first and second wheels each being adapted to move relative to the other, the relative movement in use being between a ground engaging position and a step-engaging position so that in use at least one of the first or second wheels engages a step; and respective link arms connected to the chassis so as to mount the first wheel and the second wheel to the chassis and allow each wheel to independently swing from the ground engaging position to the step-engaging position; at least one of the first and second wheels having a hub and said at least one of the first and second wheels having a motor and gearbox mounted within the hub, said motor and gearbox being connected to the respective link arms so as to pivot the other of the first and second wheels into a step engaging position.