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US Patent 7120542 - Flow monitoring system
US Patent Issued on October 10, 2006
Estimated Patent Expiration Date:
March 30, 2024Estimated 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.
Estimated Patent Expiration Date:
March 30, 2024Estimated 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.AbstractA 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
| InventorsAssigneeApplicationNo. 10814970 filed on 03/30/2004US Classes:702/45, Flow metering702/49, Radiant energy73/204.25, Resistive element73/204.19For temperatureField of Search73/204.25, Resistive element702/45, Flow metering702/49Radiant energyExaminersPrimary: Nghiem, MichaelAssistant: Cherry, Stephen J. Attorney, Agent or FirmUS Patent References4487063, Solid state mass air flow sensorIssued on: 12/11/1984 Inventor: Hopper6023969Flow modulated mass flow sensor Issued on: 02/15/2000 Inventor: Feller International ClassG01F 1/00 |
