Drill head and bone drill
OwnerHans M. F. Scheicherinventor
Life of this patent
Estimating the term…
Abstract
A drilling apparatus for the preparation of bone cavities includes a plurality of drills which are simultaneously driven in opposite direction with the cutting surfaces of each drill overlapping the cutting surfaces of at least one other drill to provide intersecting bone cavities. The drills may be driven by gearing located within the drill head or by gearing located in an attachment suitable for connection to a conventional drill head having a single output drive. The drills may be disposed along a straight or curved line or may be disposed in a triangular relationship with the axis of rotation of one of the drills being transversely movable relative to the axis of rotation of another drill.
Claims12
A drilling apparatus for the preparation of bone cavities comprising a drill head having drive means therein, at least two drills each having a shank and gear means operatively connecting said shanks to said drive means for simultaneously rotating said drills in opposite directions, each of said drills having cutting surfaces defining an area of rotation which overlaps the area of rotation of at least one other drill to provide intersecting bone cavities.
Dependencies are inferred from the claim text.