Patent ID: 7284299
Filing Date: 2007-10-23
Classification: B60B,Y10T

Abstract:
1. A caster, comprising: a yoke including a support member and first and second legs extending from an underside of the support member; a wheel including a hub having a first end disposed adjacent the first leg of the yoke and a second end disposed adjacent the second leg of the yoke; an axle extending through the hub to rotatably support the wheel between the first and second legs of the yoke; and an interface member for attaching the yoke to a moveable body, the interface member including a first portion provided on the support member of the yoke and a second portion facing the first portion and being configured such that the yoke can swivel about a vertical axis relative to the second portion, wherein a total vertical clearance between the first and second portions of the interface member is approximately 0.02 inches or less, wherein a total clearance between the first and second ends of the hub and the first and second legs of the yoke is approximately 0.032 inches or less, wherein a total clearance between an inner diameter of the hub and an outer diameter of the axle is approximately 0.008 inches or less, and wherein the wheel includes a tread material having a Shore A hardness of approximately 65 durometers or less.