Cutting tool bit
AssigneeFried. Krupp Gesellschaft mit beschrankter Haftung
InventorsHeinrich Kruger, Hans Tack
Life of this patent
Estimating the term…
Abstract
A cutting tool bit has a central mounting hole, a planar bottom face and an opposite top face having a central zone situated at a lower level than the marginal zones thereof; chip breaking elements formed on the top face; and lateral faces each defining a cutting edge with the top face. Each cutting edge has linear length portions sloping from opposite ends of the cutting edge in the direction of its middle towards the bottom face. There is further provided an elevation situated in the central zone of the top face and a plurality of surfaces each situated between a respective cutting edge and the elevation. The chip breaking elements are formed by the surfaces and the elevation.
Claims13
In a cutting tool bit having a central mounting hole, a planar bottom face and an opposite top face having a central zone situated at a lower level than the marginal zones thereof;
- chip breaking elements formed on the top face;
- and lateral faces defining cutting edges with the top face;
- the improvement wherein each cutting edge has linear length portions sloping from opposite ends of the cutting edge in the direction of its middle towards said bottom face;
- the improvement further comprising an elevation situated in said central zone and having an upper surface located at a lower level than the lowest point of said cutting edges;
- and a plurality of surfaces each situated between a respective said cutting edge and said elevation;
- said chip breaking elements being formed by said surfaces and said elevation.
Dependencies are inferred from the claim text.