Patents Assigned to MCA Micro Crystal AG
  • Drill bit or end mill with grooved flutes
    Patent number: 5160232
    Abstract: A cutting tool in the form of a drill bit or end-milling tool has an elongated body formed with at least one cutting edge defined by a flank of a flute running primarily along a rotation axis of the body and having leading and trailing flanks one of which is formed with wavelike and spaced projections and recesses. The depth of these grooves and, hence, the height of the projections increases toward the end cutting edge to break up chips.
    Type: Grant
    Filed: January 28, 1991
    Date of Patent: November 3, 1992
    Assignee: MCA Micro Crystal AG
    Inventor: Andreas Maier