Interested in licensing this patent?
MTEC can help explore whether this patent might be available for licensing for your application.
Publication Number
US-12310599-B2
Publication Date
2025-05-27
Expiration Date
Abstract
A reamer that creates blind holes in a bone has a reamer body connected to a reamer shaft. The reamer body has a shell curvature having at least a portion of a hemisphere, a convex curved exterior surface and a concave curved interior surface, extending from an apex to a lower edge. The reamer body is capable of being rotated about a perpendicular axis; and has at least a first and second left-hand spiral reamer blade. Each left-hand spiral blade extends from the lower edge to the apex and contacts each other at the apex. Each blade is positioned near a slot. When the reamer body rotates and contacts a bone or tissue, the left-hand spiral blades cut bone and pushes the cut bone toward the apex of the exterior surface.
Core Innovation
The disclosure describes a disposable reamer to create blind holes in a bone. The disposable reamer comprises a reamer body connectable to a reamer shaft, where the reamer body has shell curvature comprising at least a portion of a hemisphere with a convex curved exterior surface and a concave curved interior surface extending from an apex to a lower edge, and the reamer body is rotatable about a perpendicular axis.
The disposable reamer includes left-hand spiral reamer blades, including a first left-hand spiral reamer blade and a second left-hand spiral reamer blade, each with an inclined blade ramp and a cutting edge extending from the lower edge toward the apex. Portions of the first and second cutting edges are positioned over first and second left-hand spiral slots that extend from the convex curved exterior surface to the concave curved interior surface and are positioned between the lower edge and the apex while not contacting the lower edge and the apex. The first and second cutting edges contact each other at the apex so that, during rotation and contact with a bone or tissue, the cutting edges cut bone or tissue to create cut bone chips or cut tissue chips.
The chips are pushed toward the apex of the convex curved exterior surface so the cut bone chips or cut tissue chips break and dislodge free from the bone or the tissue. Additional embodiments include third and fourth left-hand spiral reamer blades and corresponding left-hand spiral slots and debris gaps, further shaping the configuration to support chip breaking and dislodging toward the convex exterior apex.
Claims Coverage
Two independent claims are provided, each covering a disposable reamer configured to create blind holes in bone using left-hand spiral blades and slots that push cut chips toward the convex exterior apex for breaking and dislodging. Across the independent claims, the main inventive features are the hemispherical reamer body rotatable about a perpendicular axis, the left-hand spiral blade/ramp/cutting-edge and slot positioning relationship, and the chip-breaking and dislodging mechanism at the convex exterior apex.
Disposable reamer with hemispherical shell rotatable about a perpendicular axis
A disposable reamer to create blind holes in a bone, including a reamer body having shell curvature comprising at least a portion of a hemisphere with a convex curved exterior surface and a concave curved interior surface extending from an apex to a lower edge, the reamer body being rotatable about a perpendicular axis.
First and second left-hand spiral blades with inclined blade ramps and cutting edges over left-hand spiral slots
A first left-hand spiral reamer blade having a first cutting edge fluidly extending from a first inclined blade ramp, and a second left-hand spiral reamer blade having a second cutting edge fluidly extending from a second inclined blade ramp, where the cutting edges extend outwardly from the convex curved exterior surface, extend from the lower edge toward the apex, and portions of the first and second cutting edges are positioned over respective first and second left-hand spiral slots that extend from the convex curved exterior surface to the concave curved interior surface and are positioned between the lower edge and the apex while not contacting the lower edge and the apex.
Chip pushing toward convex exterior apex to break and dislodge free
When the reamer body rotates and contacts a bone or tissue, the first and second cutting edges cut bone or tissue to create cut bone chips or cut tissue chips and push the cut bone chips or cut tissue chips toward the apex of the convex curved exterior surface so the cut bone chips or the cut tissue chips break and dislodge free from the bone or the tissue.
Disposable reamer with first and second left-hand spiral blades never positioned over left-hand spiral slots
A disposable reamer where the first left-hand spiral reamer blade has a first cutting edge with a first inclined blade ramp, and the second left-hand spiral reamer blade has a second cutting edge with a second inclined blade ramp, but the first cutting edge is never positioned over a first left-hand spiral slot and the second cutting edge is never positioned over a second left-hand spiral slot, with each slot extending from the convex curved exterior surface to the concave curved interior surface and positioned between the lower edge and the apex while not contacting the lower edge and the apex.
The independent claims share the same overall reamer concept: a hemispherical reamer body rotatable about a perpendicular axis using left-hand spiral blades with inclined blade ramps and cutting edges interacting with left-hand spiral slots so that cut chips are pushed toward the convex exterior apex and thereby break and dislodge free. The distinction between the independent claims is whether the cutting edges are positioned over the corresponding spiral slots or are never positioned over the spiral slots.
Stated Advantages
Breaks and dislodges free cut bone chips or cut tissue chips by pushing the chips toward the apex of the convex curved exterior surface.
Documented Applications
Creating blind holes in a bone using the disposable reamer.
Interested in licensing this patent?