Patents by Inventor Roger R. Arends

Roger R. Arends 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).

  • Pilot-operated back pressure regulator
    Patent number: 4295489
    Abstract: A pilot-operated back pressure regulator of simplified design and construction having a balanced valve plug attached to a diaphragm actuator and secured to the regulator body by bolts for ready simultaneous removal of the plug and actuator. The diaphragm divides the actuator into two cavities; a spring cavity acting to close the valve plug and pressure balancing cavity. A pilot valve is in communication with the inlet pressure to the regulator body, the spring cavity and an exhaust to regulate the inlet pressure to flex the diaphragm. In a preferred embodiment O-ring seals are located between (a) the valve plug and the valve seat, (b) the valve plug and its guide, and (c) the valve plug guide and the regulator body.
    Type: Grant
    Filed: October 3, 1979
    Date of Patent: October 20, 1981
    Assignee: Fisher Controls Company, Inc.
    Inventors: Roger R. Arends, Wayne B. Bailey, John W. Duffy, Brice D. Springer