Patent ID: 8484801

Claim:
A caster provided to be mounted to a bottom of a device, the caster comprising: a support defining a receiving space; a connecting member threadedly connected to the support, the connecting member comprising a bracket accommodated in the receiving space; and a wheel mounted to the bracket of the connecting member, wherein the support and the connecting member are operable to be rotated relative to each other, with the wheel moving to expose out of or retract inside the receiving space; wherein the support defines a screw hole communicating with the receiving space, the connecting member comprises a threaded post extending from the bracket and engaged in the screw hole; wherein the support comprises a lampshade shaped main body and an engaging portion extending from a top of the main body, the receiving space is defined in the main body, the screw hole is defined in the engaging portion and communicates with the receiving space; and wherein the main body defines two opposite through holes communicating with the receiving space.