Flow monitoring system
Patent 7120542 Issued on October 10, 2006. Estimated Expiration Date: 
March 30, 2024. 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.
March 30, 2024. 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 ReferencesSolid state mass air flow sensor Flow modulated mass flow sensor Patent #: 6023969 InventorsAssigneeApplicationNo. 10814970 filed on 03/30/2004US Classes:702/45, Flow metering702/49, Radiant energy73/204.25, Resistive element73/204.19For temperatureExaminersPrimary: Nghiem, MichaelAssistant: Cherry, Stephen J. Attorney, Agent or FirmInternational ClassG01F 1/00AbstractA flow monitoring system includes a first temperature-sensitive resistive device, thermally coupled to a first portion of a fluid transfer apparatus, for producing a first temperature-dependant voltage signal representative of the temperature of the fluid within the first portion of the fluid transfer apparatus. A first current control device, coupled to the first temperature-sensitive resistive device, controls a first current signal flowing through the first temperature-sensitive resistive device. A second temperature-sensitive resistive device, thermally coupled to a second portion of the fluid transfer apparatus, produces a second temperature-dependant voltage signal representative of the temperature of the fluid within the second portion of the fluid transfer apparatus. A second current control device, coupled to the second temperature-sensitive resistive device, controls a second current signal flowing through the second temperature-sensitive resistive device. A monitoring circuit monitors the first and second temperature-dependant voltage signals and produces an output signal representative of the volume of fluid passing through the fluid transfer apparatus.Other References
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