Method and apparatus for detecting and controlling mass flow
December 1, 2018. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesPrecision pressure control valve Automatic flowmeter calibration system Mass flowmeter apparatus Fluid flow stabilizing apparatus Electronic gas meter Fluid meter Intelligent mass flow controller Mass flow controller with supplemental condition sensors Mass flow controller Method for in-line calibration verification of mass flow meters InventorsApplicationNo. 203151 filed on 12/01/1998US Classes:137/487.5, Electrically actuated valve137/486Responsive to change in rate of fluid flowExaminersPrimary: Ferensic, Denise L.Assistant: Kim, Joanne Y. Attorney, Agent or FirmForeign Patent References
International ClassF16K 031/12AbstractA process mass flow instrument for measuring the mass flow rate of a process fluid including a fluid inlet, a fluid outlet, a flow passage connecting the fluid inlet and the fluid outlet, a fluid flow sensor which provides a raw output signal corresponding to an unknown mass flow rate and a processor which contains an empirically derived conversion routine for converting the raw output signal to an adjusted signal indicating the mass flow rate of the process fluid. A method for determining an unknown mass flow using an empirically derived conversion function, the function being derived by correlating the output signals of a mass flow instrument sensing the flow of a calibration fluid with the output signals of the mass flow instrument sensing the flow of the process fluid.Other References
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