Multi-pin clamp and rod attachment
First Claim
1. An external fixator for reducing fragments of a bone comprising:
- a bone fixation rod having a longitudinal axis and two ends, at least two sets of bone pins, each set comprising at least one bone pin, and each bone pin having a proximal end and a distal end, the distal end being insertable into bone on either side of a fracture, and a bone pin locking assembly for use with the bone fixation rod and bone pins, the assembly comprising;
a pin vise portion comprising first and second engaging faces, capable of engaging the proximal ends of the bone pins, and a rod attachment portion comprising;
a single-piece fixation rod clamp having a jaw portion, a coupling portion and a longitudinal axis, a coupling having a rod clamp cooperating portion and a pin vise cooperating portion, wherein the jaw portion of the single-piece fixation rod clamp permits engagement of the bone fixation rod when the single-piece fixation rod clamp is pressed onto the bone fixation rod, thereby mechanically coupling the bone pin locking assembly to the bone fixation rod.
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Accused Products
Abstract
The present invention provides a simplified external bone fixator assembly which allows the surgeon to snap the assembly onto a bone fixation rod at an intermediate location along the length of the rod. It is not necessary to “thread” the assembly onto the rod starting at the end and sliding it down the length of the rod to the desired location. In particular, this invention provides a novel bone pin locking assembly for use with standard bone fixation rods, and bone pins. The bone pin locking assembly includes a bone pin vise, a single-piece fixation rod clamp, and a coupling to allow relative adjustment of the pin vise and the rod clamp. The rod clamp is a single-piece construction, having a jaw capable of loosely capturing the bone fixation rod when the surgeon presses the jaw onto the rod. The assembly may be rigidly fixed to the rod using a bolt which tightens the jaw onto the rod.
131 Citations
26 Claims
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1. An external fixator for reducing fragments of a bone comprising:
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a bone fixation rod having a longitudinal axis and two ends, at least two sets of bone pins, each set comprising at least one bone pin, and each bone pin having a proximal end and a distal end, the distal end being insertable into bone on either side of a fracture, and a bone pin locking assembly for use with the bone fixation rod and bone pins, the assembly comprising;
a pin vise portion comprising first and second engaging faces, capable of engaging the proximal ends of the bone pins, and a rod attachment portion comprising;
a single-piece fixation rod clamp having a jaw portion, a coupling portion and a longitudinal axis, a coupling having a rod clamp cooperating portion and a pin vise cooperating portion, wherein the jaw portion of the single-piece fixation rod clamp permits engagement of the bone fixation rod when the single-piece fixation rod clamp is pressed onto the bone fixation rod, thereby mechanically coupling the bone pin locking assembly to the bone fixation rod. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An external fixator for reducing fragments of a bone comprising:
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a bone fixation rod having a longitudinal axis and two ends, at least two sets of bone pins, each set comprising at least one bone pin, with each bone pin having a proximal end and a distal end, the distal end being insertable into bone on either side of a fracture, and a bone pin locking assembly for use in an external fixator system with the bone fixation rod and bone pins, the assembly comprising;
a pin vise portion comprising first and second engaging faces, capable of engaging the proximal ends of the bone pins, and a rod attachment portion comprising;
a single-piece fixation rod clamp having a jaw portion, a coupling portion and a longitudinal axis, a rotatable coupling with a rod clamp cooperating portion and a pin vise cooperating portion, the coupling allowing;
(i) rotation of the single-piece fixation rod clamp about a first axis substantially perpendicular to the pin vise portion engaging faces, and (ii) rotation of the single-piece fixation rod clamp about the rod clamp longitudinal axis, the rod clamp longitudinal axis being substantially perpendicular to the first axis,wherein the jaw portion of the single-piece fixation rod clamp permits engagement of the bone fixation rod when the single-piece fixation rod clamp is pressed onto the bone fixation rod, thereby mechanically coupling the bone pin locking assembly to the bone fixation rod. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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17. An external fixator for reducing fragments of a bone comprising:
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a bone fixation rod having a longitudinal axis and two ends, at least two sets of bone pins, each set comprising at least one bone pin, and each bone pin having a proximal end and a distal end, the distal end being insertable into the bone on either side of a fracture, and a bone pin locking assembly for use with the bone fixation rod and bone pins, the assembly comprising;
a pin vise portion comprising first and second opposing plates, each plate having an outside face and a clamping face with grooves, the plates coupled with screw and nut combinations disposed at opposing ends of the plates, and which pin vise portion is capable of engaging the proximal ends of the bone pins through contact with grooves of the first and second plates upon tightening of the screw and nut combinations, and a rod attachment portion comprising;
a single-piece fixation rod clamp having a jaw portion, a coupling portion and a longitudinal axis, a rotatable coupling with a rod clamp cooperating portion and a pin vise cooperating portion, the coupling allowing;
(i) rotation of the single-piece fixation rod clamp about a first axis substantially perpendicular to the pin vise portion engaging faces, and (ii) rotation of the single-piece fixation rod clamp about the rod clamp longitudinal axis, the axis being substantially perpendicular to the first axis,wherein the jaw portion of the single-piece fixation rod clamp permits engagement of the bone fixation rod when the single-piece fixation rod clamp is pressed onto the bone fixation rod from the side of the bone fixation rod, thereby mechanically coupling the bone pin locking assembly to the bone fixation rod.
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Specification