Bidirectional rod-hook locking mechanism

Details Bidirectional rod-hook locking mechanism Bidirectional rod-hook locking mechanism

1996-12-23

1997-11-04

Jones, Mary Beth

Surgery

Instruments

Orthopedic instrumentation

606 73, 623 17, A61B 1770

Patent

active

056833938

ABSTRACT:
A bidirectional rod locking mechanism for use with rod coupling elements of orthopaedic rod apparatus includes a rod coupling element having a hook-shaped rod receiving end and a threaded axial bore. The axial bore is disposed so close to the hook-shaped portion that the medial portion of the hole protrudes through the inner surface of the hook portion. A contoured threaded shaft is advanced into the bore such that the contoured medial portion thereof aligns with the inner surface of the hook to permit the receipt therein of a rod. The threadable translation of the shaft in the appropriate direction causes a misalignment of the contoured medial portion in a manner which prevents the rod from being removed from the hook-shaped receiving locus.

REFERENCES:
patent: 5507746 (1996-04-01), Lin
patent: 5527314 (1996-06-01), Brumfield et al.
patent: 5562661 (1996-10-01), Yoshimi et al.
patent: 5601552 (1997-02-01), Cotrel
patent: 5601554 (1997-02-01), Howland et al.

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