WO1990013795A3 - Enhanced pressure measurement flow control system - Google Patents

Enhanced pressure measurement flow control system Download PDF

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Publication number
WO1990013795A3
WO1990013795A3 PCT/US1990/002321 US9002321W WO9013795A3 WO 1990013795 A3 WO1990013795 A3 WO 1990013795A3 US 9002321 W US9002321 W US 9002321W WO 9013795 A3 WO9013795 A3 WO 9013795A3
Authority
WO
WIPO (PCT)
Prior art keywords
valve
reservoir
container
pressure
control system
Prior art date
Application number
PCT/US1990/002321
Other languages
French (fr)
Other versions
WO1990013795A2 (en
Inventor
Dean L Kamen
Original Assignee
Deka Products Lp
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
Application filed by Deka Products Lp filed Critical Deka Products Lp
Priority to DK90907593T priority Critical patent/DK0471000T3/en
Priority to EP90907593A priority patent/EP0471000B1/en
Priority to CA002049337A priority patent/CA2049337C/en
Priority to DE69032869T priority patent/DE69032869T2/en
Priority to KR1019910701491A priority patent/KR0166337B1/en
Publication of WO1990013795A2 publication Critical patent/WO1990013795A2/en
Publication of WO1990013795A3 publication Critical patent/WO1990013795A3/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
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/168—Means for controlling media flow to the body or for metering media to the body, e.g. drip meters, counters ; Monitoring media flow to the body
    • A61M5/16804—Flow controllers
    • A61M5/16809—Flow controllers by repeated filling and emptying of an intermediate volume
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/02—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
    • F04B43/04—Pumps having electric drive
    • F04B43/043—Micropumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/004—Actuating devices; Operating means; Releasing devices actuated by piezoelectric means
    • F16K31/005—Piezo-electric benders
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F17/00—Methods or apparatus for determining the capacity of containers or cavities, or the volume of solid bodies
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M2005/1401—Functional features
    • A61M2005/1403—Flushing or purging
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/12—General characteristics of the apparatus with interchangeable cassettes forming partially or totally the fluid circuit

Abstract

The present invention provides a system for measuring in an isolated rigid container (2), partially filled with a fluid, the volume Vu of that portion of the container that is not occupied by the fluid. Reservoir means for holding a fixed known volume of a measurement gas is placed in first valved communication with the container. Pressure means (8) is in second valved communication with the reservoir. The method comprises opening first valve (D) and reading equalised pressure P1 in container and reservoir. Closing first valve (D) and opening second valve (J) to pressurise reservoir and reading pressure P2. Closing second valve (J) and reopening first valve (D) and measuring final equalised pressure P3. Evaluating Vu according to Boyle's law for ideal gases.
PCT/US1990/002321 1989-05-01 1990-04-27 Enhanced pressure measurement flow control system WO1990013795A2 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DK90907593T DK0471000T3 (en) 1989-05-01 1990-04-27 Improved flow control system for pressure measurement
EP90907593A EP0471000B1 (en) 1989-05-01 1990-04-27 Enhanced pressure measurement flow control system
CA002049337A CA2049337C (en) 1989-05-01 1990-04-27 Enhanced pressure measurement flow control system
DE69032869T DE69032869T2 (en) 1989-05-01 1990-04-27 IMPROVED DEBIT CONTROL SYSTEM THROUGH PRESSURE MEASUREMENT
KR1019910701491A KR0166337B1 (en) 1989-05-01 1990-04-27 Enhanced pressure measurement flow control system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/345,387 US4976162A (en) 1987-09-03 1989-05-01 Enhanced pressure measurement flow control system
US345,387 1989-05-01

Publications (2)

Publication Number Publication Date
WO1990013795A2 WO1990013795A2 (en) 1990-11-15
WO1990013795A3 true WO1990013795A3 (en) 1991-01-10

Family

ID=23354846

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1990/002321 WO1990013795A2 (en) 1989-05-01 1990-04-27 Enhanced pressure measurement flow control system

Country Status (9)

Country Link
US (1) US4976162A (en)
EP (1) EP0471000B1 (en)
JP (1) JP2952037B2 (en)
KR (1) KR0166337B1 (en)
AT (1) ATE175270T1 (en)
CA (1) CA2049337C (en)
DE (1) DE69032869T2 (en)
DK (1) DK0471000T3 (en)
WO (1) WO1990013795A2 (en)

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EP0471000B1 (en) 1998-12-30
CA2049337C (en) 2000-08-29
WO1990013795A2 (en) 1990-11-15
JPH05502096A (en) 1993-04-15
KR920701791A (en) 1992-08-12
DK0471000T3 (en) 1999-08-30
ATE175270T1 (en) 1999-01-15
JP2952037B2 (en) 1999-09-20
CA2049337A1 (en) 1990-11-02
DE69032869D1 (en) 1999-02-11
KR0166337B1 (en) 1999-05-01
US4976162A (en) 1990-12-11
DE69032869T2 (en) 1999-06-02

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