Patents by Inventor R. Lyle Hughes

R. Lyle Hughes 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).

  • Patent number: 4319628
    Abstract: A two liquid heat exchange system, and a safety valve to prevent contamination of one liquid (first liquid) by the other. In systems such as hydronic solar systems, it is customary for a first liquid to be heated and run through a heat exchanger where its heat is transferred to a second liquid, often in a storage tank. This invention provides a safety valve which dumps the first liquid in case the pressure of the second liquid does not exceed the pressure of the first liquid by at least a predetermined difference.
    Type: Grant
    Filed: July 13, 1979
    Date of Patent: March 16, 1982
    Assignee: Southern California Gas Company
    Inventor: R. Lyle Hughes