Patents Assigned to Precise Metals & Plastic, Inc.
  • Thermoplastic thread protector for internally threaded pipe
    Patent number: 4020874
    Abstract: A thermoplastic thread protector is provided for use in protecting internal threads of a pipe or coupling, the protector comprising a tapered shell having threads thereon and an outer flange which rest on the end of the pipe, and a tapered expansion ring designed to expand the shell into locking contact with the pipe, the shell and ring being interlocked through a rim around one end of the ring and a lip around the other end so that the protector must be unscrewed as a unit from the pipe.
    Type: Grant
    Filed: September 5, 1975
    Date of Patent: May 3, 1977
    Assignee: Precise Metals & Plastic, Inc.
    Inventor: Ronald H. Palarino