Fixation device and method for installing same
First Claim
1. Apparatus including a fixation device and a device for inserting the fixation device securely into a bore in an element, the apparatus comprising:
- a hand held device having an actuating mechanism;
a longitudinally extending member coupled to the hand held device adapted to hold the fixation device at a distal end;
a fixation device having a plurality of longitudinally extending engaging members adapted to be moved outwardly when the fixation device is inserted into the bore to secure the fixation device in the bore;
the extending member having an operating member adapted to be coupled to the fixation device for exerting a force on the fixation device tending to cause the engaging members to extend outwardly to engage the wall of the bore;
the operating member being releasably coupled to the fixation device;
the extending member comprising a cylinder and the operating member comprising a shaft disposed concentrically in the cylinder, the operating member being coupled to the fixation device for exerting an axial force on the fixation device without rotation of the operating member to cause the engaging members of the fixation device to extend outwardly;
the fixation device further comprising two parts, each having engaging members extending in one of two opposite directions, one of said parts being in engagement with an abutment surface of the cylinder to prevent movement of the part, the engaging members of the two parts being interdigitated but not necessarily on a one-to-one ratio of interdigitated engaging members and the other part being acted on by said operating member, each part having cam surfaces thereon for causing opposed engaging members of the other part to extend outwardly in response to the force applied by the operating member.
3 Assignments
0 Petitions
Accused Products
Abstract
A fixation device and apparatus for inserting the fixation device securely into a bore in an element, e.g. bone. The apparatus is a hand held device having an actuating mechanism and a longitudinally extending member coupled to the hand held device adapted to hold the fixation device at a distal end. The fixation device has a plurality of engaging members adapted to be moved outwardly when the fixation device is inserted into the bore to secure the fixation device in the bore. The extending member has an operating member coupled to the fixation device for exerting a force on the fixation device tending to cause the engaging members to extend outwardly to engage the wall of the bore. The operating member is releasably coupled to the fixation device so that once the fixation device is installed, the hand-held insertion apparatus can be removed. In one embodiment, the fixation device is releasably held by a forceps of the hand held device. In another embodiment, the fixation device is releasably held by a coupling member having a frangible connection adapted to break upon experiencing a preset tensile stress.
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Citations
26 Claims
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1. Apparatus including a fixation device and a device for inserting the fixation device securely into a bore in an element, the apparatus comprising:
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a hand held device having an actuating mechanism; a longitudinally extending member coupled to the hand held device adapted to hold the fixation device at a distal end; a fixation device having a plurality of longitudinally extending engaging members adapted to be moved outwardly when the fixation device is inserted into the bore to secure the fixation device in the bore; the extending member having an operating member adapted to be coupled to the fixation device for exerting a force on the fixation device tending to cause the engaging members to extend outwardly to engage the wall of the bore; the operating member being releasably coupled to the fixation device; the extending member comprising a cylinder and the operating member comprising a shaft disposed concentrically in the cylinder, the operating member being coupled to the fixation device for exerting an axial force on the fixation device without rotation of the operating member to cause the engaging members of the fixation device to extend outwardly; the fixation device further comprising two parts, each having engaging members extending in one of two opposite directions, one of said parts being in engagement with an abutment surface of the cylinder to prevent movement of the part, the engaging members of the two parts being interdigitated but not necessarily on a one-to-one ratio of interdigitated engaging members and the other part being acted on by said operating member, each part having cam surfaces thereon for causing opposed engaging members of the other part to extend outwardly in response to the force applied by the operating member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. Apparatus including a fixation device and a device for inserting the fixation device securely into a bore in an element, the apparatus comprising:
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a hand held device having an actuating mechanism; a longitudinally extending member coupled to the hand held device adapted to hold the fixation device at a distal end; a fixation device having a plurality of longitudinally extending engaging members adapted to be moved outwardly when the fixation device is inserted into the bore to secure the fixation device in the bore; the extending member having an operating member adapted to be coupled to the fixation device for exerting a force on the fixation device tending to cause the engaging members to extend outwardly to engage the wall of the bore; the operating member being releasably coupled to the fixation device; the extending member comprising a cylinder and the operating member comprising a shaft disposed concentrically in the cylinder, the operating member being coupled to the fixation device for exerting an axial force on the fixation device to cause the engaging members of the fixation device to extend outwardly; the fixation device further comprising two parts, each having engaging members extending in one of two opposite directions, one of said parts being in engagement with an abutment surface of the cylinder to prevent movement of the part, the engaging members of the two parts being interdigitated but not necessarily on a one-to-one ratio of interdigitated engaging members and the other part being acted on by said operating member, each part having cam surfaces thereon for causing opposed engaging members of the other part to extend outwardly in response to the force applied by the operating member; and
further wherein the fixation device has a suture connected thereto.
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22. A fixation device assembly for engagement by an insertion tool for inserting the fixation device assembly into a bore in a member, the assembly comprising:
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a first member having a plurality of engaging members, the engaging members being adapted to be engaged by a cam surface to cause the engaging members to move outwardly to engage the bore in response to actuation by said insertion tool; a second member extending longitudinally from the first member adapted to have a force releasably exerted thereon for causing the engaging members of the first member to engage the cam surface and move outwardly; and further comprising a third member having a plurality of engaging members extending oppositely to the engaging members of said first member, the engaging members of the first and third members being interdigitated, the cam surface for causing each respective engaging member to extend outwardly comprising a surface of the respective first and third members disposed opposite each respective engaging member; and wherein one of the first, second and third members has sutures connected thereto.
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23. A fixation device assembly for engagement by an insertion tool for inserting the fixation device assembly into a bore in a member, the assembly comprising:
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a first member having a plurality of engaging members, the engaging members being adapted to be engaged by a cam surface to cause the engaging members to move outwardly to engage the bore in response to actuation by said insertion tool; a second member extending longitudinally from the first member adapted to have an axial force releasably exerted thereon for causing the engaging members of the first member to engage the cam surface and move outwardly; a third member having a plurality of engaging members extending oppositely to the engaging members of said first member, the engaging members of the first and third members being interdigitated, the cam surface for causing each respective engaging member to extend outwardly comprising a surface of the respective first and third members disposed opposite each respective engaging member; and further comprising a fourth member, the fourth member comprising a cylinder having a concentric shaft disposed therethrough, the concentric shaft non-rotationally providing the axial force to said second member, and further wherein the cylinder abuts one of said first and third members to prevent said one member from moving when said force is applied to the other of said first and third members. - View Dependent Claims (24)
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25. Apparatus including a fixation device and a device for inserting the fixation device securely into a bore in an element, the apparatus comprising:
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a hand held device having an actuating mechanism; a longitudinally extending member coupled to the hand held device adapted to hold the fixation device at a distal end; a fixation device comprising a generally cylindrical element having a plurality of longitudinally extending engaging members adapted to be moved generally radially outwardly when the fixation device is inserted into the bore to secure the fixation device in the bore; the extending member having an operating member adapted to be coupled to the fixation device for exerting a force on the fixation device tending to cause the engaging members to extend generally radially outwardly to engage the wall of the bore; the operating member being releasably coupled to the fixation device; the extending member comprising a cylinder and the operating member comprising a shaft disposed concentrically in the cylinder, the operating member being coupled to the fixation device for exerting an axial force on the fixation device without rotation of the operating member to cause the engaging members of the fixation device to extend generally radially outwardly; the engaging members of the cylindrical element of the fixation device having an initial undeployed position extending in a direction along the longitudinal axis of the longitudinally extending member, said cylindrical element being acted on by said operating member, said engaging members having proximal surfaces abutting against a cam surface on said cylinder for causing said engaging members to move to a deployed position wherein the engaging members extend generally radially outwardly at an angle to the longitudinal axis in response to the force applied by the operating member. - View Dependent Claims (26)
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Specification