Patent ID: 7930801

Claim:
A caster for a door, comprising: an elongated resilient cantilever-type spring plate of unitary construction including an elongated first portion having a longitudinal axis and a second portion depending from the first portion to form an L-shape with an angle of approximately 90 degrees with the first portion; an axle mounted to the second portion of the plate such that the axle is substantially parallel to the longitudinal axis of the first portion of the plate and is offset from the first portion of the plate; and a roller operatively connected to the axle, wherein at least a part of the roller rotates, the roller has a first side substantially distributed about a plane perpendicular to the axle, the roller has a second side opposite the first side and substantially distributed about a plane perpendicular to the axle, and the first side of the roller is proximate to the second portion of the plate relative to the second side of the roller, wherein a first end of the first portion of the plate is adapted to be disposed beneath and operatively mounted to a substantially horizontal surface of the door such that a free second end of the first portion may deflect relative to the door along the longitudinal axis of the first portion of the plate such that the first portion of the plate may vary between a substantially horizontal orientation and an orientation in which the free second end is higher than the first end, and wherein the axle is mounted to the second portion of the plate only on the first side of the roller.