Patents by Inventor Anthony M. Highfield

Anthony M. Highfield has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Screw threaded fasteners
    Patent number: 4941788
    Abstract: A screw threaded insert to be installed in for example thermoplastic material by ultrasonic vibrations applied to the insert is double-ended and comprises a main helically ribbed portion separated from a minor portion formed with teeth or projections aligned with helical ribs, and a pilot portion. The pilot portion is to locate the insert in a performed bore in the required orientation of insertion, the toothed portion displaces material in complementary grooves, so as to facilitate travel of the insert into the material and ensure good filling of the inter-rib spaces.
    Type: Grant
    Filed: May 30, 1989
    Date of Patent: July 17, 1990
    Assignee: P.S.M. International PLC
    Inventor: Anthony M. Highfield
  • Screw threaded fasteners
    Patent number: RE34928
    Abstract: A screw threaded insert to be installed in for example thermoplastic material by ultrasonic vibrations applied to the insert is double-ended and comprises a main helically ribbed portion separated from a minor portion formed with teeth or projections aligned with helical ribs, and a pilot portion. The pilot portion is to locate the insert in a performed bore in the required orientation of insertion, the toothed portion displaces material in complementary grooves, so as to facilitate travel of the insert into the material and ensure good filling of the inter-rib spaces.
    Type: Grant
    Filed: June 25, 1992
    Date of Patent: May 2, 1995
    Assignee: P.S.M. International PLC
    Inventor: Anthony M. Highfield