Patents by Inventor Elmer E. Brownfield

Elmer E. Brownfield 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).

  • Safety valve
    Patent number: 4934405
    Abstract: A safety valve wherein the downstream end of the body has a threaded portion for securing the safety valve to a high pressure tank. The downstream end of the body also has a passage therethrough interconnecting the downstream end with the upstream end. A portion of the passage adjacent the downstream end of the safety valve includes a threaded portion for receiving a service valve.
    Type: Grant
    Filed: January 17, 1989
    Date of Patent: June 19, 1990
    Inventor: Elmer E. Brownfield