Articulation apparatus for external fixation device
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
A61B-017/82
A61B-017/64
A61B-017/60
F16B-002/10
F16B-007/04
출원번호
US-0721199
(2012-12-20)
등록번호
US-8888777
(2014-11-18)
발명자
/ 주소
Mullaney, Michael W.
출원인 / 주소
Zimmer, Inc.
대리인 / 주소
Schwegman Lundberg & Woessner, P.A.
인용정보
피인용 횟수 :
12인용 특허 :
64
초록▼
An articulation element consisting of a plurality of adjustable jaw pairs for the purposes of fixating the relative position of coupled bars and/or bone pins of an external bone fixator. Each of the adjustable jaws consists of a pair of hemispherical jaw elements contained within a spherical housing
An articulation element consisting of a plurality of adjustable jaw pairs for the purposes of fixating the relative position of coupled bars and/or bone pins of an external bone fixator. Each of the adjustable jaws consists of a pair of hemispherical jaw elements contained within a spherical housing. A passage is eccentrically arranged through the jaw elements to accept the pin or bar. The jaw elements have interposed between them a spring element that serves to bias the jaw elements in the closed position. Pins serve to provisionally lock the jaw elements in the closed position. Spring loaded buttons act to release the pins thereby allowing the jaw elements to open accepting the pin or bar. The jaws are attached in a back to back fashion through the use of a threaded collar which acts as a turnbuckle pulling the jaws together when tightened.
대표청구항▼
1. An articulation element for an external fixation apparatus for treating a patient, the element having a longitudinal axis, the articulation element comprising: a first clamp mechanism comprising a first socket and a first adjustable jaw pair received within the first socket, the first adjustable
1. An articulation element for an external fixation apparatus for treating a patient, the element having a longitudinal axis, the articulation element comprising: a first clamp mechanism comprising a first socket and a first adjustable jaw pair received within the first socket, the first adjustable jaw pair being disposed at a first location along the longitudinal axis and configured to capture a first rigid element of the external fixation apparatus;a second clamp mechanism comprising a second socket and a second adjustable jaw pair received within the second socket, the second adjustable jaw pair being disposed along the longitudinal axis and configured to apply clamping pressure to capture a second rigid element of the external fixation apparatus; anda coupling mechanism coupling the first clamp mechanism and the first adjustable jaw pair to the second clamp mechanism and the second adjustable jaw pair, the coupling mechanism being disposed between the first and second adjustable jaw pairs and arranged so that the first adjustable jaw pair is rotatable about the longitudinal axis relative to the second clamp mechanism and the second adjustable jaw pair, the coupling mechanism comprising a first curved surface interfacing with a second curved surface of at least one jaw of the first jaw pair,the first adjustable jaw pair being pivotable relative to the second clamp mechanism and the second adjustable jaw pair about a constrained first transverse pivot axis that is angled relative to a first rigid element captured by the first adjustable jaw pair, andthe coupling mechanism comprising a first component and a second component independent of and disposed between the first and second adjustable jaw pairs, the first and second components being rotatable relative to each other about the longitudinal axis, the first and second adjustable jaw pairs being pivotable relative to the respective first and second components. 2. The articulation element of claim 1, wherein the coupling mechanism is arranged so that the second adjustable jaw pair is rotatable about the longitudinal axis relative to the first clamp mechanism and the first adjustable jaw pair, the coupling mechanism comprising a third curved surface interfacing with a fourth curved surface of at least one jaw of the second jaw pair. 3. The articulation element of claim 2, wherein the second adjustable jaw pair is pivotable relative to the first clamp mechanism and the first adjustable jaw pair about a constrained second transverse pivot axis that is angled relative to a second rigid element captured by the second adjustable jaw pair. 4. The articulation element of claim 3, wherein the third curved surface is structurally configured to engage against the fourth curved surface of said at least one jaw of the second adjustable jaw pair and selectively limit movement of the second adjustable jaw pair about the second transverse axis. 5. The articulation element of claim 2, wherein the third curved surface and the fourth curved surface are spherical surfaces. 6. The articulation element of claim 1, wherein the first component and second component each have a facing surface disposed to face each other and cooperatively restrict rotational movement of the first component relative to the second component when the articulation element is clamped. 7. The articulation element of claim 1, comprising a locking mechanism structurally configured to lock the relative orientation of said first clamp mechanism and said first adjustable jaw pair to said second clamp mechanism and said second adjustable jaw pair. 8. The articulation element of claim 1, wherein the first transverse pivot axis intersects the longitudinal axis. 9. The articulation element of claim 1, wherein the first curved surface is a concave surface. 10. The articulation element of claim 9, wherein the concave surface is a spherical surface. 11. The articulation element of claim 1, wherein the first curved surface is structurally configured to engage against the second curved surface of said at least one jaw of the first adjustable jaw pair and selectively limit movement of the first adjustable jaw pair about the first transverse axis. 12. The articulation element of claim 1, further comprising a first biasing member disposed to apply a biasing force that acts on the first adjustable jaw pair to bias the jaws of the first adjustable jaw pair to a closed position. 13. The articulation element of claim 1, wherein the first rigid element of the external fixation apparatus is one of an external fixation bar and a bone pin. 14. The articulation element of claim 1, wherein the first socket comprises a first spherical socket and the first adjustable jaw pair comprises a first spherical adjustable jaw pair. 15. The articulation element of claim 14, wherein the coupling mechanism is arranged so that the first spherical adjustable jaw pair is pivotable within the first spherical socket relative to the first clamp mechanism and the second clamp mechanism about the constrained first transverse pivot axis. 16. The articulation element of claim 14, wherein the coupling mechanism is arranged so that the first clamp mechanism and the first adjustable jaw pair are rotatable about the longitudinal axis relative to the second clamp mechanism. 17. The articulation element of claim 1, comprising a pair of pins respectively engaging the first clamp mechanism and the first adjustable jaw pair, the constrained first transverse pivot axis being defined by a longitudinal axis of the pair of pins and the first adjustable jaw pair being pivotable relative to the second clamp mechanism about the pair of pins. 18. The articulation element of claim 1, wherein the first transverse pivot axis is perpendicular to the longitudinal axis. 19. An articulation element for an external fixation apparatus for treating a patient, the element having a longitudinal axis, the articulation element comprising: a first clamp mechanism comprising a first socket, a first adjustable jaw pair received within the first socket and a first engaging portion engageable with the first adjustable jaw pair to selectively restrict movement of the first adjustable jaw pair, the first adjustable jaw pair being disposed at a first location along the longitudinal axis and configured to capture a first rigid element of the external fixation apparatus; anda second clamp mechanism rotatable about the longitudinal axis relative to the first clamp mechanism, the second clamp mechanism comprising a second adjustable jaw pair and a second engaging portion engageable with the second adjustable jaw pair to selectively restrict movement of the second adjustable jaw pair;the first adjustable jaw pair being pivotable relative to the second clamp mechanism about a constrained first transverse pivot axis that is angled relative to a first rigid element captured by the first adjustable jaw pair, andthe first engaging portion and the second engaging portion being independent of and disposed between the first and second adjustable jaw pairs, the first and second engaging portions being rotatable relative to each other about the longitudinal axis, the first and second adjustable jaw pairs being pivotable relative to the respective first and second engaging portions, the first engaging portion comprising a first curved surface interfacing with a second curved surface of at least one jaw of the first jaw pair. 20. The articulation element of claim 19, wherein the second clamp mechanism comprises a second socket within which the second adjustable jaw pair is received, wherein the second adjustable jaw pair is disposed at a second location along the longitudinal axis and configured to capture a second rigid element of the external fixation apparatus, the first engaging portion and the second engaging portion being disposed between the first and second adjustable jaw pairs, the second adjustable jaw pair being disposed so as to pivot about a second transverse pivot axis. 21. The articulation element of claim 19, comprising a locking mechanism structurally configured to lock the relative orientation of said first adjustable jaw pair to said second adjustable jaw pair. 22. The articulation element of claim 19, wherein the first transverse pivot axis intersects the longitudinal axis. 23. The articulation element of claim 19, wherein the first engaging portion comprises a first facing surface and the first curved surface opposing the first facing surface, and wherein the second engaging portion comprises a second facing surface and an opposed second curved surface, the first facing surface disposed to face the second facing surface and cooperatively restrict rotational movement of the first engaging portion relative to the second engaging portion when the articulation element is clamped. 24. The articulation element of claim 23, wherein the first and second facing surfaces are flat surfaces. 25. The articulation element of claim 19, wherein the first curved surface comprises a concave surface. 26. The articulation element of claim 25, wherein the concave surface is a spherical surface. 27. The articulation element of claim 19, wherein the first curved surface is structurally configured to engage against the second curved surface of said at least one jaw of the first adjustable jaw pair and selectively limit movement of the first adjustable jaw pair about the first transverse axis. 28. The articulation element of claim 19, wherein the first socket comprises a first spherical socket and the first adjustable jaw pair comprises a first spherical adjustable jaw pair. 29. An articulation element for an external fixation apparatus for treating a patient, the element having a longitudinal axis, the articulation element comprising: a clamp mechanism comprising a spherical socket;a spherical adjustable jaw pair received within the socket, the jaw pair being disposed at a first location along the longitudinal axis, each jaw of the jaw pair comprising a spherical outer surface interfacing with the socket and an eccentric Gothic arch inner surface configured to capture a first rigid element of the external fixation apparatus;a reference component; anda coupling mechanism coupling the clamp mechanism and the jaw pair to the reference component, the coupling mechanism being disposed at a second location along the longitudinal axis and arranged so that the jaw pair is rotatable about the longitudinal axis relative to the reference component, the coupling mechanism comprising a curved surface interfacing with the spherical surface of at least one jaw of the jaw pair,the jaw pair being pivotable relative to the reference component about a constrained first transverse pivot axis that is angled relative to the first rigid element captured by the jaw pair.
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