(12) United States Patent ao) Patent No.: us 6,251,112 Bi
Jackson (45) Date of Patent: Jun. 26,2001
A closure for an open ended medical implant with a pair of spaced arms to maintain a rod or the like in the implant. The closure including a top plate with depending side flanges forming a discontinuous internally threaded ring that is threadably received on the implant in comparatively low profile from side to side. The closure includes a central cylinder depending from the plate to maintain spacing of the implant arms. The plate and cylinder have coaxial bores that receive a set screw. A set of tools for installing the closure includes a closure holding tool, a closure installation tool with a head to receive the closure and threaded side wings that complete the thread on said closure flanges, a set screw torquing tool and a closure anti-torquing tool to hold the closure in position when the set screw is being tightened. A closure removal tool is also included and has a head to receive the closure and a turning handle.
20 Claims, 5 Drawing Sheets