Patent ID: 8317789

Claim:
A compression transmission collar apparatus for implantation into a bone including the medullary canal surrounded by the cortex and a near cortex hole having a near cortex hole wall comprising; an intramedullary nail for insertion into the medullary canal in the bone surrounded by the cortex, said intramedullary nail defining a bore extending transverse to said intramedullary nail and being threaded, a threaded fastener including a threaded portion extending transversely to said intramedullary nail for threadedly engaging said bore, a compression transmission collar of annular shape having an exterior face and a top edge for receiving a compressional load from said threaded fastener and a bottom edge for transmitting said compressional load to said intramedullary nail, and said compression transmission collar having an extended length (L E ) and a compressed length (L C ) and including a first end intersecting said top edge at an acute angle and said bottom edge at an obtuse angle and a second end intersecting said top edge at an obtuse angle and said bottom edge at an acute angle and said first end partially overlapping and opposing said second end to define a slit such that applying said compressional load to said top edge causes said first end to slide relative to and along said second end causing said compression transmission collar to compress axially between said extended length (L E ) and said compressed length (L C ) and expand radially for pressing said exterior face against the near cortex hole wall to fasten the bone to said threaded fastener and said intramedullary nail.