Patents Assigned to EFG & E International
  • Flow metering device for landfill gas extraction well
    Patent number: 6591695
    Abstract: A coupling having an integral orifice plate engages upstream and downstream segments of a landfill piping system. Upstream and downstream ports are respectively formed through the walls of the coupling adjacent the orifice plate. The difference in pressure at the ports is correlated to a flow rate through the pipe. Sensor fittings are threadably engaged with the ports, and to support the threadable engagement, the wall of the coupling through which the ports are formed has a thickness of at least around one-half inch.
    Type: Grant
    Filed: July 28, 1999
    Date of Patent: July 15, 2003
    Assignee: EFG & E International
    Inventors: Ronald L. Brookshire, Travis Brookshire