Patents Assigned to Flowdrill B.V.
  • Flow drill for the provision of holes in sheet material
    Patent number: 4454741
    Abstract: A flow drill having a cross sectional contour defined by a complex harmonic curve symmetrical in the rotation direction permitting reverse of drill rotation.
    Type: Grant
    Filed: February 19, 1982
    Date of Patent: June 19, 1984
    Assignee: Flowdrill B.V.
    Inventor: Aloysius J. Hoogenboom