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US 10,905,453 B2Granted
Pin drive rotary surgical cutting tools and powered handpieces
AssigneeMedtronic PS Medical, Inc.
InventorsPaul Cihak, Zachary Heiliger
Life of this patent
Estimating the term…
Abstract
A surgical cutting tool includes an elongated shaft and a cutting head. The shaft defines a coupling portion terminating at a proximal end of the shaft, a stem portion, and a distal portion. The stem portion defines a central axis. The coupling portion optionally defines a deflection surface positioned oblique with respect to the central axis and connected with a first driven surface and a second driven surface. Upon insertion into a drive chuck, the deflection surface promotes self-alignment of the cutting tool and the drive chuck.
Claims15
A surgical tool for use in the dissection of bone, biomaterials, and/or other tissue when mated with a motor, the surgical tool comprising:
- an elongated shaft defining opposing, first and second ends, a dissection portion adjacent the first end, a coupling portion adjacent the second end, and an intermediate portion between the dissection and coupling portions, the intermediate portion defining a central axis of the shaft;
- wherein the coupling portion includes exactly two interface structures, each interface structure positioned on opposite sides of the central axis and extending from a leading position adjacent the second end to a trailing position spaced apart from the leading position in a direction of the first end, wherein each interface structure includes:
- a first driven surface bound by a first lateral edge, a first outer longitudinal edge and an inner longitudinal edge;
- and
- a second driven surface bound by a second lateral edge, a second outer longitudinal edge and the inner longitudinal edge;
- wherein the first and second lateral edges extend from the inner longitudinal edge to the first and second outer longitudinal edges, respectively;
- and further wherein in a plane perpendicular to the central axis, a linear length of the first lateral edge is greater than a linear length of the second lateral edge;
- and further wherein in the plane perpendicular to the central axis, a perimeter of the coupling portion is continuously curved in extension from the first outer longitudinal edge of a first one of the exactly two interface structures to the second outer longitudinal edge of a second one of the exactly two interface structures.
5 more elements
A surgical tool for use in the dissection of bone, biomaterials, and/or other tissue when mated with a motor, the surgical tool comprising:
- an elongated shaft defining opposing, first and second ends, a dissection portion adjacent the first end, a coupling portion adjacent the second end, and an intermediate portion between the dissection and coupling portions, the intermediate portion defining a central axis of the shaft;
- wherein the coupling portion includes exactly two interface structures, each interface structure positioned on opposite sides of the central axis and extending from a leading position adjacent the second end to a trailing position spaced apart from the leading position in a direction of the first end, wherein each interface structure includes:
- a first driven surface bound by a first lateral edge, a first outer longitudinal edge and an inner longitudinal edge;
- and
- a second driven surface bound by a second lateral edge, a second outer longitudinal edge and the inner longitudinal edge;
- wherein the first and second lateral edges extend from the inner longitudinal edge to the first and second outer longitudinal edges, respectively;
- and further wherein in a plane perpendicular to the central axis, a linear length of the first lateral edge is greater than a linear length of the second lateral edge;
- wherein the coupling portion further includes at least one deflection surface projecting from the first lateral edge of a first one of the exactly two interface structures to the second end in a major plane arranged oblique to the central axis such that the first lateral edge of the first one of the exactly two interface structures is longitudinally spaced from the second end.
5 more elements
A surgical tool for use in the dissection of bone, biomaterials, and/or other tissue when mated with a motor, the surgical tool comprising:
- an elongated shaft defining opposing, first and second ends, a dissection portion adjacent the first end, a coupling portion adjacent the second end, and an intermediate portion between the dissection and coupling portions, the intermediate portion defining a central axis of the shaft;
- wherein the coupling portion includes exactly two interface structures, each interface structure positioned on opposite sides of the central axis and extending from a leading position adjacent the second end to a trailing position spaced apart from the leading position in a direction of the first end, wherein each interface structure includes:
- a first driven surface bound by a first lateral edge, a first outer longitudinal edge and an inner longitudinal edge;
- and
- a second driven surface bound by a second lateral edge, a second outer longitudinal edge and the inner longitudinal edge;
- wherein the first and second lateral edges extend from the inner longitudinal edge to the first and second outer longitudinal edges, respectively;
- and further wherein in a plane perpendicular to the central axis, a linear length of the first lateral edge is greater than a linear length of the second lateral edge;
- and further wherein the inner longitudinal edge of a first one of the exactly two interface structures includes a longitudinal groove that is open to the second end.
5 more elements
Dependencies are inferred from the claim text.