Patents Assigned to Nederlandse Hardmetaal Fabrieken B.V.
  • Patent number: 4934879
    Abstract: In a cutting tool having a cutting element, the rake angle in the region following the land is approximately 35.degree. and decreases with increasing distance from the land. Beginning at a distance from the land corresponding approximately to the width of the land, a plurality of chip ridges project from the cutting face in the region between the cutting point regions to form a rake angle of about one-half the rake angle of the cutting face and whose frontal face on the side of the cutting edge projects to about the level of the land. The cutting face regions following the cutting face regions disposed between the chip ridges when seen in the chip discharge direction are configured as ramp elevations and are provided with run-up ramps ascending from the cutting face.
    Type: Grant
    Filed: October 5, 1989
    Date of Patent: June 19, 1990
    Assignee: Nederlandse Hardmetaal Fabrieken B.V.
    Inventor: Marinus van Barneveld