Compression screw assembly
First Claim
Patent Images
1. A compression screw assembly for applying compression to a fractured bone comprising:
- a lag screw having a first engaging means formed thereon;
a compression plate including a hollow barrel member adapted to receive said lag screw in at least one fixed orientation, the interior of said barrel member having a second engaging means formed thereon;
a wrench assembly adapted to releasably engage said lag screw in axial alignment therewith;
optional clip means for being optionally insertable into said barrel member for the selective prevention or allowance of axial rotation of said lag screw with respect to said barrel member, said optional clip means having surface contours complimentary with said first and second engaging means for cooperating with said first and second engaging means to prevent said axial rotation when said optional clip means is inserted into said barrel member, and said lag screw being allowed to rotate with respect to said barrel member when said optional clip means is not inserted into said barrel member.
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Abstract
A compression screw assembly for applying compression to a fractured bone includes a lag screw, a compression plate including a hollow barrel member adapted to receive the lag screw in at least one fixed orientation, a wrench assembly adapted to releasably engage the lag screw in axial alignment therewith, and apparatus having surface contours complimentary with the outer surface of the lag screw and inner surface of the barrel member for being optionally insertable into the barrel member to prevent axial rotation of the lag screw with respect to the barrel member.
105 Citations
4 Claims
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1. A compression screw assembly for applying compression to a fractured bone comprising:
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a lag screw having a first engaging means formed thereon; a compression plate including a hollow barrel member adapted to receive said lag screw in at least one fixed orientation, the interior of said barrel member having a second engaging means formed thereon; a wrench assembly adapted to releasably engage said lag screw in axial alignment therewith; optional clip means for being optionally insertable into said barrel member for the selective prevention or allowance of axial rotation of said lag screw with respect to said barrel member, said optional clip means having surface contours complimentary with said first and second engaging means for cooperating with said first and second engaging means to prevent said axial rotation when said optional clip means is inserted into said barrel member, and said lag screw being allowed to rotate with respect to said barrel member when said optional clip means is not inserted into said barrel member. - View Dependent Claims (2, 3, 4)
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Specification