Apparatus for drilling bone
OwnerHans G. Neuhauserinventor
Life of this patent
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Abstract
An apparatus for forming a hole in a bone is provided, which comprises a body, a drill bit rotatable with respect to the body, and, in order to locate the drill, a mandrel coaxial with the drill bit, slidably projectable through the drill bit and biased to an extended position.
Claims20
Apparatus suitable for forming a hole in bone, which comprises a body comprising a manually gripable outer casing, an inner shaft rotatably arranged within the casing, a drill bit attached to the lower end of the inner shaft for rotation therewith, and a mandrel coaxial and rotatable with respect to the drill bit, said mandrel being slidably projectable through said drill bit between a retracted and an extended position, means biasing said mandrel to an extended position and teeth on said mandrel for abutting the bone to prevent rotation of the mandrel relative to the bone.
Apparatus for forming an opening in a bone, more particularly in the hip bone, for the insertion of an artificial joint socket for an artificial hip joint to be provided on the femur, with an elongated tool carrier which is to be manually held in a desired operating position and is equipped on its front end with a milling cutter which is rotatable by a driving device, characterised by a supporting and centering mandrel which projects from the front end face of the milling cutter and is axially slidable in the tool carrier against the action of a force accumulator, is rotatable with respect to the carrier, and has teeth which can abut the bone and prevent rotation of the mandrel with respect to the bone.
Dependencies are inferred from the claim text.