Cutting burr shank configuration
AssigneeSynthes USA, LLC
InventorsEddy H. del Rio, Duane Jeffrey Enck
Life of this patent
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Abstract
A cutting burr that includes a pair of axially spaced diamond-shaped portions designed to be keyed into a spindle of a locking mechanism of a high speed surgical drilling instrument and adapted to fit into a single pawl thereof to lock said cutting burr in place so as to prevent axial movement thereof and provide concentric rotation of said cutting burr without any wobbling. The orientation of both portions may be identical with respect to a center plan and diamond shape in the portion at the proximal end of the shank of the cutting tool may be larger than the intermediately located diamond shape of the other portion. The apexes of the facets of the six-sided diamond shape may be disposed below the surface of the shank of the cutting burr.
Claims36
A cutting burr having a shank with an engagement end at a proximal end of the shank adapted to be received by a surgical drill, comprising:
- a first diamond-shaped portion formed at the proximal end of the shank and having first side edges, the first diamond-shaped portion having a first pair of facets that meet at a first apex and an opposing second pair of facets;
- and
- a second diamond-shaped portion axially spaced along a shaft of the shank from the first diamond-shaped portion and having second side edges, the second diamond-shaped portion having a third pair of facets that meet at a second apex and an opposing fourth pair of facets,
- wherein the first diamond-shaped portion is adapted to be inserted into a complementary shaped mating recess of the surgical drill, and
- wherein the second diamond-shaped portion is adapted to make with a complementary locking pawl of the surgical drill.
A cutting burr having a shank and an engagement end formed at a proximal end of the shank, comprising:
- a pair of axially spaced six-sided members formed at the proximal end of the shank, each of the pair of six-sided diamond-shaped members being oriented in a same direction and in parallel planes,
- wherein apexes of each of the six-sided members are in axial alignment,
- wherein the one of the pair of six-sided diamond-shaped members is adapted to be inserted into a surgical drill and to accept rotational engagement forces, and
- wherein the other of the pair of six-sided diamond-shaped members is adapted to be engaged by a locking pawl to prevent axial movement of the cutting burr.
A cutting burr, comprising:
- a cylindrically shaped shank;
- a cutting bit formed at distal end of the cutting burr;
- and
- an attachment portion formed at a proximal end of the cutting burr, the attachment portion defining a first diamond-shaped portion at a proximal end thereof, and a second diamond-shaped portion at an axially spaced intermediate position that is a predetermined distance from the first diamond-shaped portion,
- wherein the first diamond-shaped portion and the second diamond-shaped portion have axially aligned apexes and respective facets disposed within parallel planes,
- wherein the first diamond-shaped portion is adapted to receive clockwise or counter-clockwise rotation forces applied by a surgical drill having a complementary keyed slot to receive the first diamond-shaped portion, and
- wherein the second diamond-shaped portion is adapted to be axially locked within the surgical drill.
Dependencies are inferred from the claim text.