Patent ID: 8910951
Filing Date: 2014-12-16
Classification: B60B,B60Y,B62B,Y10T

Abstract:
1. A caster wheel arrangement comprising: a support frame; at least a first primary wheel coupled to the support frame, the first primary wheel having a first radius; a leading wheel coupled to the support frame at a position forward of the first primary wheel, the leading wheel having a second radius that is smaller than the first radius of the first primary wheel, and the leading wheel being raised relative to the first primary wheel while the caster wheel arrangement travels over flat ground; and a trailing wheel coupled to the support frame at a position rearward of the first primary wheel, the trailing wheel having a third radius that is smaller than the first radius of the first primary wheel, and the trailing wheel being raised relative to the first primary wheel, wherein the third radius of the trailing wheel is smaller than the second radius of the leading wheel.