US Patent 8147491 Multi-angle clamp

A clamp for an external fixation system includes a body having a bottom portion and semi-spherical top portion. The top portion has a threaded bore provided along a longitudinal axis: The clamp includes a clamp assembly having a base with a semi-spherical cavity and a lid positioned over the base to house at least one pin between the base and the lid. The base and the lid have a bore provided along a longitudinal axis thereof. A fastening member is provided that extends through the bore in the base and the lid of the clamp assembly and is secured within the threaded bore of the top portion of the body. The bores in the base and the lid have a diameter that is greater than the diameter of the fastening member.