Tandem wheeled roller skate

Claim 1

A tandem-wheeled roller skate wherein the wheels thereof are arranged in single file and substantially centrally relative to the skate, comprising in combination: i. a supporting structure of a sole plate, a pair of longitudinally extending spaced parallel wheel-carrying plates secured to said sole plate and projecting downwardly substantially at right angles, and a set of wheels, ii. hub assemblies for each wheel, iii. a solid tire of deep cross-section on each wheel surrounding said hub assembly, iv. a pair of substantially planar annuli on either side of said tire and partially over-lapping the same, said annuli being centrally apertured to accommodate said hub assemblies, and v. a pair of disc-shaped friction washers of a diameter approximateLy equal to that of said annuli between the inner surfaces of said wheel plates and the outer surfaces of said wheel annuli, said wheel-carrying plates being of flat stock and in side elevation seen to be essentially circular providing resiliently yieldable pressure plates at the location of said wheels and also at said location being generally of a diameter equal to that of said annuli, said hub assemblies each embodying a ball-race assembly and having planar end surfaces which project slightly outwards beyond both sides of the plane of the outer surface of said wheel annulus but less than the thickness of said friction-washer, said hub assemblies each being mounted on a nut and bolt wheel axle assembly projecting through said hub assembly and said wheel-carrying plate, said washers being centrally apertured and loosely mounted upon, and surrounding the projecting portions of said hub assemblies whereby upon tightening said nut and bolt wheel axle assemblies resistance to rotation by said wheel may be varied and controlled by the pressure of said wheel plates against said friction-washers and co-efficient between the surfaces of same and the opposing adjacent inner and outer surfaces of said wheel and carrying plate surfaces transmitted pressure by said friction-washers against said wheel annuli, said annuli being recessed within the flanks of said tires so that in axial cross-section, said flanks are observed to have surfaces which are generally co-terminous and co-planar with the outer rim of said annuli, said tires being frictionally secured to said hub assemblies and said annuli.