U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Thermal anemometry mass flow measurement apparatus and method

Patent 6868723 Issued on March 22, 2005. Estimated Expiration Date: Icon_subject May 16, 2023. 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 References

Thermal gauge probe
Patent #: 4016758
Issued on: 04/12/1977
Inventor: Taylor

Methods and systems for fluid identification and flow rate determination
Patent #: 5515295
Issued on: 05/07/1996
Inventor: Wang

Flow modulated mass flow sensor
Patent #: 6023969
Issued on: 02/15/2000
Inventor: Feller

Coaxial probe for high temperature and high pressure applications Patent #: 6642807
Issued on: 11/04/2003
Inventor: Gard

Inventors

Assignee

Application

No. 10440371 filed on 05/16/2003

US Classes:

73/204.22, With sensor housing73/866.5PROBE OR PROBE MOUNTING

Examiners

Primary: Lefkowitz, Edward
Assistant: Mack, Corey D.

Attorney, Agent or Firm

International Class

G01F001/66

Abstract

A mass flow measurement apparatus including a flow path defined by a tubular side wall, a probe extending through the side wall into the flow path so that a first portion of the probe is located in the flow path and a second portion of the probe, extends out of the side wall, a heater element secured to the probe, and a seal preventing fluid flowing through the flow path from contacting the heater element.

Other References

  • Mass Flow Meters and Controllers for Gases, Mass-Streamâ„¢, M+W Instruments, (12 pages).
  • TSI Mass Flowmeters, Theory of Operation, Copyright 2001, TSI Incorporated, (1 page).
  • Economical Thermal Mass Flow Sensor Based on Constant Temperature Anemometry, Lotters, Joost, Bronkhorst High-Tech B. V, presented at Sensor 99, May 18-20, 1999, Nurnberg, Germany, (6 pages).
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