Wheel assembly for exerciser

Abstract

A wheel assembly for exerciser comprises a staged sleeve coupled to a foot and comprising a collar, a conic surface, and a fastening mechanism; and a cup-shaped flexible wheel comprising a multi-sided outer surface, an eccentric staged bore, an annular flange on a mouth of the bore, a conic surface extended inwardly from the flange, and a mating fastening mechanism at a bottom end. As to the assembled wheel and sleeve, the other end of the sleeve is engaged with the bottom edge of the wheel, the fastening mechanism is engaged with the mating fastening mechanism, the conic surface of the sleeve is urged against inside of the wheel, the collar is in contact with an internal side of the flange and is restrained from moving out of the flange. Also, a rotation of the wheel causes the mating fastening mechanism to move engagement with the fastening mechanism in a predetermined angle.

What is claimed is:  
     
         1 . A wheel device for an exerciser comprising: 
 a sleeve comprising a smaller diameter section having one end coupled to a foot on a supporting surface, a larger diameter section, a first shoulder at a junction of the smaller and the larger diameter sections, an external collar on the larger diameter section, a conic surface abutted the other end, a second shoulder at a junction of the conic surface of the sleeve and the larger diameter section, and a fastening mechanism at the other end; and    a cup-shaped flexible wheel comprising a multi-sided outer surface on the supporting surface, an eccentric bore, an internal annular flange on a mouth of the bore, the flange having a diameter larger than an outer diameter of the conic surface of the sleeve but smaller than a diameter of the collar, an internal conic surface extended inwardly from the flange, a shoulder at a junction of the conic surface of the wheel and a cylindrical surface extended from the conic surface of the wheel to a bottom, and a mating fastening mechanism at a bottom end;    wherein in response to an assembly the wheel onto the sleeve, the other end of the sleeve is engaged with the bottom edge of the wheel, the fastening mechanism is engaged with the mating fastening mechanism, the conic surface of the sleeve is urged against the cylindrical surface, the second shoulder is urged against the conic surface of the wheel, the collar is in contact with an internal side of the flange so as to be restrained from moving out of the flange, and a rotation of the wheel causes the mating fastening mechanism to move engagement with the fastening mechanism in a predetermined angle.    
     
     
         2 . The wheel device of  claim 1 , wherein the fastening mechanism comprises a plurality of indentations equally spaced around the other end of the sleeve.  
     
     
         3 . The wheel device of  claim 1 , wherein the mating fastening mechanism comprises a plurality of projections equally spaced around the bottom edge of the wheel.