Patents Assigned to Wales-Beech Corporation
  • Thread-forming screw
    Patent number: 4069730
    Abstract: An improved thread-forming screw has a circular threaded main body portion and a tapered lobular pilot or thread-forming section comprising a plurality of transverse elongated projections or lobes on a circular conical core, each lobe having a sharp ridge running the full length thereof. The sharp edges on the lobes minimize the torque required to form threads in a workpiece, while the circular main body portion maximizes the holding power of the screw in the workpiece.
    Type: Grant
    Filed: June 3, 1976
    Date of Patent: January 24, 1978
    Assignee: Wales-Beech Corporation
    Inventor: Charles E. Gutshall