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US 7,118,574 B2Granted
Arthroscopic bone burr device
AssigneeEthicon, Inc.
InventorsSamit J. Patel, Thomas Ryan, Simon Cohn, Martin Nohilly, Julian Mark Ebbutt, Alistair Fleming
Life of this patent
Estimating the term…
Abstract
An arthroscopic bone burr having an articulated sheath tube. The sheath tube may be articulated angularly and transversely relative to the housing by a ball-type joint, a flange-in-socket joint with sufficient play to permit displacement of the sheath tube, or by use of an elastomer. Anti-rotation means are provided to prevent the sheath tube from rotating relative to the housing.
Claims20
A surgical tool for removing material from a surface, comprising:
- a front tool assembly coupled to a handle, the front tool assembly comprising a housing and a rotatable burr shaft extending therefrom with a burr attached at one end of the burr shaft and a rotary drive apparatus coupled to the other end for selectively rotating the burr shaft as controlled by a user;
- and,
- a sheath tube disposed substantially coaxially over the burr shaft and attached at a first end to the front tool assembly housing and having an opening proximate a second end thereof through which said burr contacts the surface for removing material, said sheath tube being attached to said front tool assembly housing at an articulation, said articulation enabling said sheath tube to be displaced from axial alignment with said front tool assembly housing.
A surgical tool for removing material from a surface, comprising:
- a front tool assembly coupled to a handle, the front tool assembly comprising a housing and a rotatable burr shaft extending therefrom with a burr attached at one end of the burr shaft and a rotary drive apparatus coupled to the other end for selectively rotating the burr shaft as controlled by a user;
- a sheath tube disposed substantially coaxially over the burr shaft and attached at a first end to the front tool assembly housing and having an opening proximate a second end thereof through which said burr contacts the surface for removing material, said sheath tube being attached to said front tool assembly housing at an articulation, said articulation enabling said sheath tube to be displaced from axial alignment with said front tool assembly housing;
- and
- a bearing for rotatably supporting the burr shaft distal to the burr, said bearing inserting into said housing substantially coaxially with said ball joint, capturing said ball joint between a distal tip of said housing and said bearing, said bearing having a first slot extending along an outer peripheral surface thereof in an axial direction and said housing having a key extending inwardly, said slot receiving said key to retain said bearing in a fixed orientation relative to said housing, said bearing having an end surface facing said tip of said housing, said end surface having second and third slots therein, said male ball and said female socket each having an anti-rotation pin extending in a proximal direction therefrom and received in said second and third slots respectively to limit rotation of said male ball and said female socket relative to said bearing.
1 more element
A surgical tool for removing material from a surface, comprising:
- a front tool assembly coupled to a handle, the front tool assembly comprising a housing and a rotatable burr shaft extending therefrom with a burr attached at one end of the burr shaft and a rotary drive apparatus coupled to the other end for selectively rotating the burr shaft as controlled by a user;
- a sheath tube disposed substantially coaxially over the burr shaft and attached at a first end to the front tool assembly housing and having an opening proximate a second end thereof through which said burr contacts the surface for removing material, said sheath tube being attached to said front tool assembly housing at an articulation, said articulation enabling said sheath tube to be displaced from axial alignment with said front tool assembly housing;
- and
- a first bearing supporting said burr shaft and disposed between said articulation and the rotary drive apparatus, a second bearing supporting said burr shaft and disposed between said first bearing and the rotary drive apparatus, said first bearing and said second bearing are spaced one from another.
1 more element
Dependencies are inferred from the claim text.