60156 ⎘
Wheels or wheel attachments designed for increasing traction; Wheels with spade lugs with radially-adjustable spade lugs; Control mechanisms therefor involving gearing, e.g. gear pinions acting upon threaded shafts on the spade lugs
WHEEL AND LEG TRANSFORMABLE ROBOT WITH SUSPENSION AND AUTONOMOUS NAVIGATION
ROAD SURFACE ADAPTIVE ADJUSTABLE DRIVING WHEEL