Cutting element, cutter support and hollow drill
OwnerAchim Jauchinventor
Life of this patent
Estimating the term…
Abstract
The invention relates to a cutting element for a hollow drill comprising a cutting area and an essentially cylindrical area. The essentially cylindrical area has recesses, which are arranged on the inside at regular intervals and open toward the cutting area. In one embodiment of the invention, the recesses extend in an axial direction while being arranged in an interspaced manner preferably in the peripheral direction. The recesses arranged at regular intervals in the peripheral direction produce a geometric shape that is generally described as a polygon. The invention also relates to a cutter support and to a hollow drill. The cutting element is connected to the cutter support via a clamping connection preferably in a manner that enables the cutting element to be detached.
Claims28
A hollow drill comprising:
- a hollow cutting element having a cutting region disposed on a free end, the cutting body having a longitudinal bore having a multiple-edged inner surface and an essentially cylindrical outer surface, the inner surface having a plurality of inside depressions arranged at regular intervals and opening in the direction of the cutting region, the cutting element having at least one tab disposed on a second end;
- and
- a cutter support wherein the cutting element and cutter support are produced as separate components, the cutter support having an orifice disposed on a distal end for receiving the second end of the cutting element, the orifice being frusto-conically shaped in which the diameter of the frusto-conical orifice increases as the orifice extends farther from the distal end, and the cutter support including at lease one elevation,
- wherein the cutting element is releasably connected to the cutter support when the second end of the cutting element is inserted into the orifice of the cutter support such that the at least one tab releasably engages the at least one elevation.
A cutting element for cutting material with a hollow drill, the cutting element comprising:
- a generally hollow cutting body having a free end which forms a sharp, generally circular cutting edge and a second end adapted to be attached to an end of a hollow drill, the cutting body having an essentially smooth cylindrical outer surface, and a longitudinal bore extending therethrough, an inner surface of the bore defining a cutting region and a first part region,
- wherein in the cutting region, the inner surface of the bore has a frusto-conical shape that narrows inwardly from the cutting region, and
- wherein in the first part region, the bore extends inwardly from the cutting region towards the second end, the inner surface of bore in the first part region having a multiple-edged, non-circular shape where the multiple edges are separated by depressions arranged at regular intervals.
Dependencies are inferred from the claim text.