Patents Examined by W. D. Gray
  • Patent number: 4078622
    Abstract: A device is provided for creating recesses for road surface markers in road surfaces which makes initially a cut sufficient to stabilize the device in the desired position and then fragments and discharges core material within a circular cut defining the recess. Such fragmentation is effected by rotation of a plurality of radially disposed cutting edges each spanning only a portion of the radius of the material to be fragmented.
    Type: Grant
    Filed: August 5, 1976
    Date of Patent: March 14, 1978
    Inventor: Robert W. Taylor-Myers