Patent ID: 6913050
Filing Date: 2005-07-05
Classification: B60B,Y10T

Abstract:
1. A wheel with a spring unit comprising: a rim including a rim side rib protruding radially inwardly; a disc spaced from said rim to form an annular space between said rim and said disc, said disc including a disc side rib protruding radially outwardly; a plurality of spring units directed circumferentially and arranged in said annular space, each of said plurality of spring units including a metal spring, each of said plurality of spring units having a first end engaging said rim side rib and a second, opposite end engaging said disc side rib; wherein said rim side rib includes either one of a rib formed integrally with said rim and a first member fixed to said rim, and said disc side rib includes either one of a rib formed integrally with said disc and a second member fixed to said disc, said rim side rib and said disc side rib being engageable with each other in a wheel rotational direction, and wherein said disc includes a pair of stopper ribs spaced from said rim side rib in an axial direction of said wheel and said disc side rib and arranged on opposite sides of said rim side rib and said disc side rib in said axial direction of said wheel.