Patents Assigned to Plansee Tizit
  • Drill bit
    Patent number: 6021857
    Abstract: A masonry drill bit having an active diameter of D, comprising a shaft and a tip 1 for engaging a workpiece, wherein the tip 1 is formed with a plurality of stepped portions shaped to cut a workpiece as the drill bit rotates. By virtue of the drill bit tip 5 configuration as described and claimed herein, a masonry drill bit 1 having improved performance is provided.
    Type: Grant
    Filed: September 17, 1997
    Date of Patent: February 8, 2000
    Assignees: Black & Decker Inc., Plansee Tizit
    Inventors: Rudi Birk, Werner Ferstl, Ronald Huber, Walter Lempach