System for measuring and controlling gas mass flow
October 29, 2016. 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 ReferencesMethod and apparatus for flow metering Measurement of air mass flow into an internal combustion engine Density insensitive coriolis mass flow rate meter Double-pigtail-shaped, Coriolis-type mass flow rate meter Method and apparatus for calibrating a flowmeter using a master meter and a prover Mass flow controller Control apparatus and method for controlling fluid flows and pressures Nonvibrating conduit inertia force flowmeter Fluid mass flow meters Metering valve InventorAssigneeApplicationNo. 738774 filed on 10/29/1996US Classes:137/487.5, Electrically actuated valve73/1.16, Volume of flow, speed of flow, volume rate of flow, or mass rate of flow73/861.354, Coriolis or gyroscopic137/118.04, Flow rate responsive137/468, Thermal responsive137/486Responsive to change in rate of fluid flowExaminersPrimary: Ferensic, Denise L.Assistant: Farid, Ramyar Foreign Patent References
International ClassG05D 007/06Foreign Application Priority Data1995-10-30 ITAbstractA system for measuring and controlling the mass flow of a gas of variable characteristics within a pipe by a metering valve, wherein a Coriolis mass flow meter mounted in the pipe is connected to the valve processor unit to calculate a correction factor for the flow rate calculated by the valve and represented by the ratio of the values originating from the Coriolis meter to those originating from the valve, this factor being updated periodically when the operating conditions do not introduce an error into the Coriolis meter. A multi-valve system for different flow rates is also described comprising a single Coriolis meter. | |
