Plastic double nut mechanism enabling rigid orthopedic distracti

Details Plastic double nut mechanism enabling rigid orthopedic distracti Plastic double nut mechanism enabling rigid orthopedic distracti

1998-02-10

1999-10-19

Buiz, Michael

Surgery

Instruments

Orthopedic instrumentation

606 57, 606 54, A61B 1766

Patent

active

059680431

ABSTRACT:
A distraction apparatus for an external fixation device used to rigidly immobilize bone fragments during bone lengthening and angular deformity correction includes distractor mechanisms and pivotable spacers for connecting frame members of an external fixator, and wire and half pin fasteners. The interconnected distractor mechanisms, pivotable spacers and frame members form a rigid structure with rigidity which is maintained during adjustment of the distraction. For linear distraction, the distraction mechanism is a single screw assembly with a single-threaded rod and dual plastic nuts disposed either side of a metallic adjustment surface. After tightening down, the nuts may be synchronously co-rotated, advantageously using a tool such as a double wrench engaging on aligned faces of the nuts. This synchronous co-rotation causes linear displacement along the threaded rod, thereby enabling distraction. Further, the metal-to-plastic inter-face between the nuts and the adjustment surface facilitates this synchronous co-rotating without causing loosening of the nuts, thereby minimizing the introduction of play in the mechanism during distraction.

REFERENCES:
patent: 1869726 (1932-08-01), Youngren
patent: 1997466 (1935-04-01), Longfellow
patent: 2035952 (1936-03-01), Ettinger
patent: 2055024 (1936-09-01), Bittner, Jr.
patent: 2056749 (1936-10-01), Thomas
patent: 2101889 (1937-12-01), Anderson
patent: 2120446 (1938-06-01), Thomas
patent: 2198871 (1940-04-01), Haboush
patent: 2214490 (1940-09-01), Thomas
patent: 2238870 (1941-04-01), Haynes
patent: 2250417 (1941-07-01), Ettinger
patent: 2346346 (1944-04-01), Anderson
patent: 2391537 (1945-12-01), Anderson
patent: 2406987 (1946-09-01), Anderson
patent: 2439995 (1948-04-01), Thrailkill
patent: 2497626 (1950-02-01), Persall
patent: 2687720 (1954-08-01), Haboush
patent: 3727610 (1973-04-01), Riniker
patent: 3941123 (1976-03-01), Volkov et al.
patent: 3976061 (1976-08-01), Volkov et al.
patent: 3977397 (1976-08-01), Kalnberz et al.
patent: 3985127 (1976-10-01), Volkov et al.
patent: 3993055 (1976-11-01), Volkov et al.
patent: 4006740 (1977-02-01), Volkov et al.
patent: 4033340 (1977-07-01), Kalnberz
patent: 4100919 (1978-07-01), Oganesyan et al.
patent: 4127119 (1978-11-01), Kronner
patent: 4185623 (1980-01-01), Volkov et al.
patent: 4256112 (1981-03-01), Kopf et al.
patent: 4271832 (1981-06-01), Evans et al.
patent: 4308863 (1982-01-01), Fischer
patent: 4312336 (1982-01-01), Danieletto et al.
patent: 4338927 (1982-07-01), Volkov et al.
patent: 4365624 (1982-12-01), Jaquet
patent: 4404967 (1983-09-01), Bacal et al.
patent: 4463758 (1984-08-01), Patil et al.
patent: 4502473 (1985-03-01), Harris et al.
patent: 4541422 (1985-09-01), de Zbikowski
patent: 4548199 (1985-10-01), Agee
patent: 4554915 (1985-11-01), Brumfield
patent: 4573459 (1986-03-01), Litton
patent: 4583897 (1986-04-01), Briles
patent: 4611586 (1986-09-01), Agee et al.
patent: 4615338 (1986-10-01), Ilizarov et al.
patent: 4628919 (1986-12-01), Clyburn
patent: 4658809 (1987-04-01), Ulrich et al.
patent: 4662365 (1987-05-01), Gotzen et al.
patent: 4730608 (1988-03-01), Schlein
patent: 4745913 (1988-05-01), Castaman et al.
patent: 4768524 (1988-09-01), Hardy
patent: 4784125 (1988-11-01), Monticelli et al.
patent: 4922896 (1990-05-01), Agee et al.
patent: 4931055 (1990-06-01), Bumpus et al.
patent: 4973331 (1990-11-01), Pursley et al.
patent: 4978348 (1990-12-01), Ilizarov
patent: 4988349 (1991-01-01), Pennig
patent: 5015205 (1991-05-01), Franks, Jr.
patent: 5129388 (1992-07-01), Vignaud et al.

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