Patents by Inventor Tommy L. Wells

Tommy L. Wells 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).

  • Plug type control valve having improved means protecting the stem thereof
    Patent number: 4007912
    Abstract: A plug type valve for use in handling the flow of particulate catalyst is disclosed. In catalytic cracking equipment, it is necessary to regenerate the catalyst. The flow of catalyst to and from the regenerator must be controlled. A plug valve is disclosed for control of the flow of catalyst and the valve includes a tapered spear-like plug formed of a sacrificial material mounted on a stem. The stem is protected against the abrasive action of the particulate catalyst by means of a cylindrical spaced shield below the valve element and a circular jet of steam ejected downwardly below the shield and parallel to the stem.
    Type: Grant
    Filed: November 13, 1975
    Date of Patent: February 15, 1977
    Assignee: Pullman Incorporated
    Inventor: Tommy L. Wells