Having Bolt Pointing Means Patents (Class 470/86)
  • Die for self drilling screws
    Patent number: 5980390
    Abstract: Improved die for use in the manufacture of self drilling screws comprising a forwardly disposed work face provided with cavity for forming the point and flute section of the screw, a recess proximate to the cavity for receiving a portion of the flash material produced during forging and a planar bumper area terminating in a top edge proximate to the cavity.
    Type: Grant
    Filed: October 17, 1997
    Date of Patent: November 9, 1999
    Inventor: Frank Ferrante