60151 ⎘
Wheels or wheel attachments designed for increasing traction; Wheels with spade lugs with pivotally-mounted spade lugs
Vehicle Wheel and Vehicle Including the Same
#2WHEEL AND LEG TRANSFORMABLE ROBOT WITH SUSPENSION AND AUTONOMOUS NAVIGATION
#3Transformability(TM): personal mobility with shape-changing wheels
#4Flotation drive wheel for a self-propelled irrigation system