Patents by Inventor David W. Nunnally

David W. Nunnally 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).

  • Integrated gas supply and leak detection system
    Patent number: 7107820
    Abstract: The invention generally relates to a system and method for integrated gas delivery and leak detection to one or more applications. The system includes at least one application site, a process conduit extending from a process gas source site to the application site, a first and second process flow control at the process conduit, and a first pressure sensor. Also included in the system is a microprocessor that is in electronic communication with the flow controls and the first pressure sensor, wherein the microprocessor is programmed to respond to an application standby request by performing a pressure decay test, including closing the second process flow control and pressurizing a portion of the system by opening the first process flow control.
    Type: Grant
    Filed: May 2, 2003
    Date of Patent: September 19, 2006
    Assignee: Praxair S.T. Technology, Inc.
    Inventors: David W. Nunnally, Douglas J. Gifford
  • Integrated gas supply and leak detection system
    Publication number: 20040216514
    Abstract: The invention generally relates to a system and method for integrated gas delivery and leak detection to one or more applications. The system includes at least one application site, a process conduit extending from a process gas source site to the application site, a first and second process flow control at the process conduit, and a first pressure sensor.
    Type: Application
    Filed: May 2, 2003
    Publication date: November 4, 2004
    Applicant: Praxair S. T. Technology, Inc.
    Inventors: David W. Nunnally, Douglas J. Gifford