Sectional wheel with relatively rotatable sections

Abstract From the Canadian patent

First and second wheel sections are provided with the first section including structure for attachment to a vehicle wheel for rotation therewith. structure is provided supporting the second section from the first section for angular displacement relative thereto about a predetermined axis and the first and second sections include outer partial circular edges having the aforementioned axes as their centers of curvature. The sections are relatively rotatably between first positions with the partial circular edges together defining an outer circular periphery of the wheel and second positions with the sections relatively angularly displaced 180° and the partial circular edges thereof disposed …