Connector having a stop member

• US 5,514,138 A
• Filed: 02/04/1994
• Issued: 05/07/1996
• Est. Priority Date: 02/08/1991
• Status: Expired due to Term

• Current Assignee: Howmedica Osteonics Corp. (Stryker Corporation)
• Original Assignee: Pfizer Inc.
• Inventors: McCarthy, Thomas F.
• Primary Examiner(s): Hafer, Robert A.
• Assistant Examiner(s): HANLON, BRIAN EMMETT
• Application Number:
  US08/191,974
• Time in Patent Office: 823 Days
• Field of Search: 606/53, 606/60, 606/65-71
• US Class Current: 606/65
• CPC Class Codes: A61B 17/746 the longitudinal elements coupled to a plate opposite the femoral head

Abstract

An improved device for repairing fractured bones is provided, the device comprising a specially designed connector, which is especially useful in combination with a plate having a tab cut out, a stop, a flat portion and a bore portion and with a compression screw and a lag screw.

Claims

1. A device for lagging two bone segments comprising:

a lag screw having a first end for engaging one of said bone segments and a second end having a threaded bore;

a bone plate for engaging the other of said bone segments and having a bore formed therein having first and second ends for slidably receiving said lag screw, said bore having a tab cutout formed on said bore said tab cutout having a stop face intermediate said ends;

a threaded element insertable within said bore plate from one end of the bore for engaging the threaded bore of said lag screw, said threaded element having a free end and

a compression screw insert having an inward face, an outward face and a radially extending tab portion, said tab portion having an axially inwardly facing stop surface for engaging the stop face of said tab cutout of said bone plate, said radially extending tab portion engaging said stop face of the tab cutout of said bone plate when said tab portion is fully advanced along said tab cutout, said stop face of the tab cutout of said bone plate having a length such that upon engagement of said radially extending tab portion with said stop face of said tab cutout and the engagement of said outward face of said compression screw insert with the free end of said threaded element, the inward face of said compression screw insert is spaced from said second end of said lag screw to permit longitudinal outward movement from said stop face of said tab cutout of said lag screw upon rotation of said threaded element.

2. A device for lagging two bone segments according to claim 1 wherein said plate further comprises a substantially flat plate portion, said bore being integral with and angled with respect to said flat plate portion.

3. A device for lagging two bone segments according to claim 1, wherein said compression screw insert has a threaded internal bore which mates with the threads on said threaded element.

4. A device for lagging two bone segments according to claim 1, wherein said bone plate is a supracondylar plate.