Patent ID: 7992254
Filing Date: 2011-08-09
Classification: B60B,B62B,Y10T

Abstract:
1. A caster device, comprising: a caster including a reciprocatingly rotatable cam element, the caster being coupled to a movable object; a crank shaft coupled to the cam element; a rotating member rotatably coupled to the movable object, the rotating member having a plurality of pins spaced apart from one another along a circumferential direction; a pushing member for rotating the rotating member, the pushing member being vertically movably coupled to the movable object; and a connecting rod for connecting the crank shaft and the rotating member, wherein the connecting rod and the crank shaft convert rotation of the rotating member caused by movement of the pushing member into reciprocating rotation of the cam element, wherein the pins are retractably mounted to the rotating member, and wherein each of the pins includes a tapered surface contacting the pushing member at a top end thereof.