Surgical reamer
AssigneeLinvatec Corporation
InventorRobert Davis
Life of this patent
Estimating the term…
Abstract
A surgical bone reamer includes a rotatable, elongated shank having a proximal end, a distal end and a longitudinal axis, and a reaming head mounted on the distal end. A plurality of equally spaced walls are radially disposed on the reaming head around the longitudinal axis, and tip edges for penetrating bone are defined on the radial walls to be disposed angularly with the longitudinal axis. Reaming edges joined to the tip edges extend longitudinally from the tip edges in the proximal direction parallel to and an equal radial distance from the longitudinal axis for reaming a cylindrical tunnel when the reaming head is rotated in bone. Tapered flutes disposed angularly between the tip edges and the radial walls permit bone to be evacuated through the reaming head when forming a tunnel in bone.
Claims32
A surgical bone reamer comprising
- a rotatable body having a proximal end, a distal end, a longitudinal axis and a longitudinal bore extending from said distal end to said proximal end;
- a drill tip at said distal end including tip edges positioned around said axis and disposed angularly with a plane normal to said axis for penetrating bone;
- reaming edges joined to said tip edges and extending longitudinally from said tip edges to said proximal end parallel with said axis for forming a tunnel when said body is rotated in bone, said drill tip being tapered in a distal direction from said reaming edges to said bore;
- flute surfaces disposed between said tip edges for evacuating bone along said flute surfaces when said body is rotated in bone;
- and
- an elongate shank for mounting said body to rotate said body in bone.
A surgical bone reamer as recited in claim 8 wherein said flute surfaces are tapered in a distal direction from said connecting surfaces to said distal end.
A surgical bone reamer comprising
- a rotatable body having a proximal end, a distal end, a central longitudinal bore extending from said proximal end to said distal end and a longitudinal axis;
- walls on said body positioned around said bore in planes radially aligned with said axis;
- reaming edges on said walls extending longitudinally from said proximal end toward said distal end, said reaming edges being disposed an equal radial distance from said axis for forming a cylindrical tunnel when said body is rotated in bone;
- tip surfaces joined to said walls and defining, walls, tip edges disposed in said planes of said walls, said tip edges extending angularly, distally from said reaming edges to said bore at said distal end;
- notches disposed between said walls at said distal end and including curved edges extending proximally from said distal end to said walls for defining cusps at said distal end for initially entering bone when said body is rotated therein;
- and
- a shank mounting said body to rotate said body in bone.
Dependencies are inferred from the claim text.