Patents by Inventor Larry D. Welch

Larry D. Welch 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).

  • High pressure choke assembly
    Patent number: 4662401
    Abstract: A pressurized fluid is "let-down" to atmospheric pressure as it passes through a choke assembly having two pressure orifices (choke flow beans) which are in-line and directly opposite and which are designed to deliver jet streams of generally equal force to a common in-line focal point. The choke assembly is a fixed-rate system where the volume throughput is regulated primarily by the pressure on the fluid.
    Type: Grant
    Filed: September 8, 1980
    Date of Patent: May 5, 1987
    Assignee: Dowell Schlumberger Incorporated
    Inventors: Warren M. Zingg, Larry D. Welch