Surgery – Instruments – Orthopedic instrumentation
Patent
1996-01-11
1997-04-29
Tucker, Guy V.
Surgery
Instruments
Orthopedic instrumentation
606 54, A61B 1760
Patent
active
056244401
ABSTRACT:
A compact external fixator used to repair small bone fractures which includes an elongate cylindrical support rod to which are mounted a pair of articulation assemblies. Each assembly is held to the support rod by a rod clamp which, in a loosened condition, can rotate about and translate along the support rod. When tightened, the clamps fix the positions of the articulation assemblies relative to the rod. A pin carrier block is pivotally attached to each rod clamp to pivot about a first pivot axis that is perpendicular to and offset from the rod. As with the clamp, the pivotal motion of the block can be selectively fixed or loosened. Each block further includes a generally planar circular pin mounting shelf with a central axis normal to the plane of the shelf. The plane of the shelf is substantially parallel to and offset from the first pivot axis. A generally planar and disk-like pin clamp ring is disposed centered coaxially over the central axis of each pin shelf. Each ring includes a first face in which are formed a pair of spaced apart, parallel pin guide tracks, with the first face being disposed toward and spaced apart from the pin shelf. A pair of pins is captured between the first face and the pin shelf, with the pins located in the pin guide tracks. The pins and pin clamp rings are rotatable about the central axis of the pin shelf until the ring is tightened.
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