Patent ID: 6588059
Filing Date: 2003-07-08
Classification: B60B,F16C,Y10T

Abstract:
A plastic caster comprising:a fork assembly having a bearing housing portion, two legs rigid with the housing portion, and at least one wheel mounted between the legs for rotation about a first axis, the bearing housing portion being formed around a bearing assembly, the bearing assembly having inner and outer ring-shaped raceways with bearings, the housing portion being formed such that the outer raceway is securely affixed to the housing portion while the inner raceway rotates freely about a second axis which is substantially normal to the first axis, the housing portion further comprising a first surface which is remote from the first axis; a top-plate having a second surface abutting the first surface, an extension extending from the second surface and having an opening therein, the extension engaging the inner raceway thereby permitting the top plate and fork assembly to independently rotate about the second axis; and a retention plug mated with the opening of the extension preventing disengagement of the top-plate from the inner raceway thereby securely attaching the top-plate to the inner raceway.