Orthopaedic distractor and/or fixator

• US 5,676,664 A
• Filed: 11/27/1995
• Issued: 10/14/1997
• Est. Priority Date: 11/27/1995
• Status: Expired due to Term

• Current Assignee: Zimmer Technology Incorporated (Zimmer Biomet Holdings, Inc.)
• Original Assignee: Zimmer Incorporated (Zimmer Biomet Holdings, Inc.)
• Inventors: Bales, Joel, Persons, Charles D., Price, Gregory G., Allard, Randall N.
• Primary Examiner(s): Buiz, Michael
• Assistant Examiner(s): Woo, Julian W.
• Application Number:
  US08/562,724
• Time in Patent Office: 687 Days
• Field of Search: 606/57, 606/58, 606/59, 606/61, 606/97, 606/53, 606/54, 606/56
• US Class Current: 606/57
• CPC Class Codes: A61B 17/66 Alignment, compression or distraction mechanisms

Abstract

The invention is directed to an apparatus for externally reducing and/or fixating a fracture in a bone. The apparatus includes a radiolucent rod, and a carriage assembly with a clamp assembly for connection to a fixation pin. A sleeve is threadingly connected with the carriage assembly and is disposed about the rod. A clamping device interconnects the sleeve with the rod at a selective one of a plurality of locations along a length of the rod. Rotation of the sleeve relative to the carriage assembly moves the rod in an axial direction relative to the carriage assembly.

Claims

1. An apparatus for at least one of externally reducing and fixating a fracture in bone, comprising:

a carriage assembly including a clamp assembly for connection to a fixation pin;

a rod having a substantially smooth exterior surface;

an externally threaded sleeve interconnecting said rod with said carriage assembly, said externally threaded sleeve being threadingly connected with said carriage assembly and disposed about said rod;

said externally threaded sleeve defining an interior surface, said interior surface of the externally threaded sleeve being substantially smooth; and

means engaging said smooth exterior surface of said rod for attaching said sleeve to said rod at a selective one of a plurality of locations along a length of said rod,

wherein said sleeve is shiftable relative to said rod and is securable relative to the rod by said attaching means, wherein as said sleeve and rod are rotated relative to said carriage assembly the carriage assembly moves longitudinally along said sleeve.

2. The apparatus of claim 1, wherein said attaching means applies a radially inward force to said rod to hold said sleeve at said selected location.

3. The apparatus of claim 1, wherein said attaching means comprises a collar and a nut, said nut being threadingly engaged with said sleeve.

4. The apparatus of claim 3, wherein said nut is configured to deflect said collar in a radially inward direction and thereby apply a radially inward force to said rod.

5. The apparatus of claim 1, wherein said rod has a hexagonal cross-section.

6. The apparatus of claim 1, wherein said sleeve comprises a metal sleeve.

7. The apparatus of claim 1, wherein said sleeve has an opening extending through the length thereof, said rod disposed within said opening.