Patents by Inventor Lyman Ketcham

Lyman Ketcham 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).

  • Apparatus and process of convoluting thermoplastic tubing without the use of wires
    Patent number: 4427616
    Abstract: Apparatus and method for convoluting TEFLON tubing without use of wires, rotating a mandrel which has a diameter smaller than that of the TEFLON, threading the mandrel at the other end, rotating and assemblying over a threaded portion a means in an opposite direction thereof, and supporting at each end means allowing the mandrel to pass axially therethrough and having a series of worm gears rotatingly mounted in diametrical opposite pairs.
    Type: Grant
    Filed: November 16, 1981
    Date of Patent: January 24, 1984
    Assignee: Simmonds Precision Products Inc.
    Inventor: Lyman Ketcham