Patents by Inventor Francis N. Corfield

Francis N. Corfield 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).

  • Pressure relief valve
    Patent number: 5390696
    Abstract: A pressure relief valve includes a fluid flow channel (6, 19, 21) through which an initial flow of fluid passes in use, and a valve opening member (23) responsive at a predetermined fluid pressure to open the valve (13) and allow an increased fluid flow therethrough. The valve opening member (23) is located substantially centrally in the fluid flow channel (6, 19, 21) to ensure it is always exposed to the fluid flow. Part of the flow channel (21) is formed by part of the valve (13). The valve opening member (23) and flow channel (21) are elongated and parallel. A screen (13) on the valve screens the outlet end of the channel (21) from the fluid inlet port (6).
    Type: Grant
    Filed: October 13, 1993
    Date of Patent: February 21, 1995
    Assignee: Dowty Aerospace Gloucester Limited
    Inventors: Jeremy G. Bird, Brian D. Birch, Francis N. Corfield