Patent ID: 6115882
Filing Date: 2000-09-12
Classification: B60B,Y10T

Abstract:
A caster comprising:a wheel;a yoke comprising a generally horizontal base and first and second forks depending from the base;an axle extending through said first fork and said second fork, and defining an axis of rotation for said wheel such that said wheel is mounted on said axle for rotation between said first and second forks;a stem extending upwards from said base and defining a stem axis, said base mounted on said stem for rotation about said stem axis wherein said base is free to swivel with respect to the stem;wherein at least the upper end of said stem has a generally cylindrical surface, wherein the stem has a hole having a circumference defined by an internal threading for fastening to a correspondingly externally threaded fastener;and wherein said stem includes a generally planar surface defined by at least one chord intersecting the circumference of the generally cylindrical surface but not crossing through said threaded hole's circumference.