Patents by Inventor John R. Bennett

John R. Bennett 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).

  • Fluid operable valves
    Patent number: 4197873
    Abstract: A fluid operable valve suitable for use in high temperature and pressure environments involving the flow of solids material, incorporates a main valve member and a pilot valve member co-operable with separate seats axially spaced apart in association with the inlet of the valve. The arrangement is such that in operation the pilot valve member is sequenced to close against its seat prior to the main valve member which is purged prior to closure by a gas to remove particles of material which might cause ineffective sealing.
    Type: Grant
    Filed: February 13, 1978
    Date of Patent: April 15, 1980
    Assignee: Coal Industry (Patents) Limited
    Inventors: Michael I. Minogue, John R. Bennett, John C. Whitehead