SE7705919L - GAS FLOOD SENSOR DEVICE - Google Patents

GAS FLOOD SENSOR DEVICE

Info

Publication number
SE7705919L
SE7705919L SE7705919A SE7705919A SE7705919L SE 7705919 L SE7705919 L SE 7705919L SE 7705919 A SE7705919 A SE 7705919A SE 7705919 A SE7705919 A SE 7705919A SE 7705919 L SE7705919 L SE 7705919L
Authority
SE
Sweden
Prior art keywords
orifice
flow
gas flow
pressure
resistance
Prior art date
Application number
SE7705919A
Other languages
Unknown language ( )
Swedish (sv)
Other versions
SE432023B (en
Inventor
J J Osborn
Original Assignee
Research Dev Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US05/779,557 external-priority patent/US4083245A/en
Application filed by Research Dev Corp filed Critical Research Dev Corp
Publication of SE7705919L publication Critical patent/SE7705919L/en
Publication of SE432023B publication Critical patent/SE432023B/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
    • G01F1/34—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure
    • G01F1/36—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure the pressure or differential pressure being created by the use of flow constriction
    • G01F1/40—Details of construction of the flow constriction devices
    • G01F1/42—Orifices or nozzles
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/08—Detecting, measuring or recording devices for evaluating the respiratory organs
    • A61B5/087—Measuring breath flow
    • A61B5/0876—Measuring breath flow using means deflected by the fluid stream, e.g. flaps

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Medical Informatics (AREA)
  • Surgery (AREA)
  • Biophysics (AREA)
  • Pathology (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Physiology (AREA)
  • Molecular Biology (AREA)
  • Pulmonology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Volume Flow (AREA)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)

Abstract

TO ALL WHOM IT MAY CONCERN: BE IT KNOWN that I, JOHN J. OSBORN, a citizen of the United States of America, residing in the City of Tiburon, County of Marin, State of California, have invented certain new and useful improvements in a VARIABLE ORIFICE GAS FLOW SENSING HEAD of which the following is a specification. A gas flow meter employing means for obtaining a differential pressure across a resistance orifice in a line of gas flow. Although flow through the orifice may be turbulent thus making the differential pressure non linear with respect to the amount of flow, the effect of that turbulence is offset by the provision of a hinged flap within the orifice which opens upon increase in gas flow thereby lowering the orifice's resistance to that flow. Because of the variable resistance orifice the resultant pressure differential is linear with respect to the amount of flow. The differential pressure is sensed by pressure tubes disposed on opposite sides of the orifice and the hinged flap is arranged to flex over the downstream pressure tube so as to protect it from eddy currents. Moreover, the flap is hinged at the top and opens from the bottom whereby free liquid may pass through the orifice without any significant change in calibration.
SE7705919A 1976-07-29 1977-05-18 GAS FLOW SENSOR DEVICE SE432023B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US70986776A 1976-07-29 1976-07-29
US05/779,557 US4083245A (en) 1977-03-21 1977-03-21 Variable orifice gas flow sensing head

Publications (2)

Publication Number Publication Date
SE7705919L true SE7705919L (en) 1978-01-30
SE432023B SE432023B (en) 1984-03-12

Family

ID=27108328

Family Applications (1)

Application Number Title Priority Date Filing Date
SE7705919A SE432023B (en) 1976-07-29 1977-05-18 GAS FLOW SENSOR DEVICE

Country Status (5)

Country Link
JP (1) JPS5316658A (en)
CA (1) CA1069342A (en)
DE (1) DE2723337A1 (en)
FR (1) FR2360063A1 (en)
SE (1) SE432023B (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4197857A (en) * 1978-04-06 1980-04-15 Research Development Corporation System for measurement of oxygen uptake and respiratory quotient
DE3020265C2 (en) * 1979-05-29 1984-03-15 Research Development Corp., San Francisco, Calif. Pneumotachograph
JPS6256820A (en) * 1985-09-06 1987-03-12 Shinmeguro Keiki Kk Throttle device for flow rate measurement
DE3709776A1 (en) * 1987-03-25 1988-10-06 Eckardt Ag Method of measuring the flow of a medium through a pipeline or the like
EP0331772A1 (en) * 1988-03-08 1989-09-13 Dräger Nederland B.V. Differential pressure meter for bidirectional flows of gas
EP0331773A1 (en) * 1988-03-08 1989-09-13 Dräger Nederland B.V. Flow-resistant pipe for a gas flow meter
BR112012033642B1 (en) * 2010-06-29 2021-08-03 Rostrum Medical Innovations Inc SPIROMETER BREATH TUBE, COMPOSITE MEMBRANE AND TUBE USE
US9476744B2 (en) * 2014-10-08 2016-10-25 Dieterich Standard, Inc. Integrated orifice plate assembly
NL2022125B1 (en) * 2018-12-03 2020-06-30 Suss Microtec Lithography Gmbh Apparatus for measuring a fluid flow through a pipe of a semiconductor manufacturing device

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2989866A (en) * 1956-01-03 1961-06-27 Bendix Corp Cantilever beam flowmeter

Also Published As

Publication number Publication date
CA1069342A (en) 1980-01-08
DE2723337A1 (en) 1978-02-02
FR2360063A1 (en) 1978-02-24
JPS5316658A (en) 1978-02-15
SE432023B (en) 1984-03-12
JPS61567B2 (en) 1986-01-09

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