Patent ID: 6796345
Filing Date: 2004-09-28
Classification: B60B,Y10T

Abstract:
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.