Patents by Inventor David H. Nash, Jr.

David H. Nash, Jr. 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).

  • Liquid ring pumps with automatic control of seal liquid injection
    Patent number: 6558131
    Abstract: A liquid ring pump system includes structure configured to automatically and actively vary the amount of seal liquid injected into the sweep of the pump (in order to boost gas discharge pressure) based on one or more variable operating parameters of the pump.
    Type: Grant
    Filed: June 29, 2001
    Date of Patent: May 6, 2003
    Assignee: nash
    Inventor: David H. Nash, Jr.