CA2282628A1 - Leak detection system for liquid processing device - Google Patents

Leak detection system for liquid processing device Download PDF

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Publication number
CA2282628A1
CA2282628A1 CA002282628A CA2282628A CA2282628A1 CA 2282628 A1 CA2282628 A1 CA 2282628A1 CA 002282628 A CA002282628 A CA 002282628A CA 2282628 A CA2282628 A CA 2282628A CA 2282628 A1 CA2282628 A1 CA 2282628A1
Authority
CA
Canada
Prior art keywords
liquid
liquid processing
sensing resistor
processing device
detection system
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
CA002282628A
Other languages
French (fr)
Other versions
CA2282628C (en
Inventor
Raymond A. Carr
Brian C. Lauman
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
VIVOLUTION AS
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of CA2282628A1 publication Critical patent/CA2282628A1/en
Application granted granted Critical
Publication of CA2282628C publication Critical patent/CA2282628C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
    • G01M3/16—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
    • G01M3/042—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by using materials which expand, contract, disintegrate, or decompose in contact with a fluid
    • G01M3/045—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by using materials which expand, contract, disintegrate, or decompose in contact with a fluid with electrical detection means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
    • G01M3/16—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means
    • G01M3/18—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators
    • G01M3/186—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators for containers, e.g. radiators

Abstract

A leak sensor system for use in liquid processing equipment is disclosed.
Liquid is detected by a sensing resistor whose impedance decreases dramatically in the presence of liquid. The effect of this impedance drop on the output voltage of the sensor indicates a wet or moist state which may indicate leakage from the liquid processing. A terminal resistor is in the circuit beyond the sensing resistor to provide a warning indicator when the sensing resistor is damaged or disconnected. The leak sensor system is particularly useful in centrifuge equipment, e.g., for the processing of blood.
CA002282628A 1997-02-27 1998-02-27 Leak detection system for liquid processing device Expired - Fee Related CA2282628C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US3918497P 1997-02-27 1997-02-27
US60/039,184 1997-02-27
PCT/US1998/003942 WO1998038485A2 (en) 1997-02-27 1998-02-27 Leak detection system for liquid processing device

Publications (2)

Publication Number Publication Date
CA2282628A1 true CA2282628A1 (en) 1998-09-03
CA2282628C CA2282628C (en) 2006-11-07

Family

ID=21904113

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002282628A Expired - Fee Related CA2282628C (en) 1997-02-27 1998-02-27 Leak detection system for liquid processing device

Country Status (8)

Country Link
US (1) US6038914A (en)
EP (1) EP0980513A4 (en)
JP (1) JP2001517303A (en)
AU (1) AU724237B2 (en)
CA (1) CA2282628C (en)
IL (1) IL131470A0 (en)
NZ (1) NZ337335A (en)
WO (1) WO1998038485A2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9950105B2 (en) 2007-02-09 2018-04-24 Baxter International Inc. Blood treatment and electrical blood leak detection device therefore
US10463778B2 (en) 2007-02-09 2019-11-05 Baxter International Inc. Blood treatment machine having electrical heartbeat analysis

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US6812847B1 (en) 2000-08-25 2004-11-02 The Hoover Company Moisture indicator for wet pick-up suction cleaner
US7022098B2 (en) 2002-04-10 2006-04-04 Baxter International Inc. Access disconnection systems and methods
US10155082B2 (en) 2002-04-10 2018-12-18 Baxter International Inc. Enhanced signal detection for access disconnection systems
US7052480B2 (en) 2002-04-10 2006-05-30 Baxter International Inc. Access disconnection systems and methods
US20040254513A1 (en) * 2002-04-10 2004-12-16 Sherwin Shang Conductive polymer materials and applications thereof including monitoring and providing effective therapy
US7951182B2 (en) 2005-07-14 2011-05-31 Zoll Circulation, Inc. System and method for leak detection in external cooling pad
US7605710B2 (en) 2006-08-18 2009-10-20 Fresenius Medical Care Holdings, Inc. Wetness sensor
US8376978B2 (en) 2007-02-09 2013-02-19 Baxter International Inc. Optical access disconnection systems and methods
WO2009122229A1 (en) 2008-04-01 2009-10-08 Gambro Lundia Ab An apparatus and a method for monitoring a vascular access
US8114043B2 (en) 2008-07-25 2012-02-14 Baxter International Inc. Electromagnetic induction access disconnect sensor
US20100100026A1 (en) * 2008-10-16 2010-04-22 Fresenius Medical Care Holdings, Inc. Wetness sensor utilizing passive resonant circuits
US8808218B2 (en) * 2010-01-29 2014-08-19 Baxter International Inc. Needle placement detection and security device and method
US8444585B2 (en) * 2010-01-29 2013-05-21 Baxter International Inc. Catheter needle retention and placement monitoring system and method
US9245438B2 (en) 2014-05-27 2016-01-26 Delta Faucet Company Water leak detector for a pipe having a retention reservoir
KR102038858B1 (en) 2015-06-30 2019-10-31 생-고뱅 퍼포먼스 플라스틱스 코포레이션 Leak detection system
WO2017115145A1 (en) 2015-12-31 2017-07-06 Delta Faucet Company Water sensor
CN111386452A (en) * 2017-11-27 2020-07-07 美国圣戈班性能塑料公司 Leak detection system and methods of making and using same
AU2021290310B2 (en) 2020-07-15 2022-08-25 Hollister Incorporated Resistance sensor for identifying leak locations in ostomy system

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US4122389A (en) * 1977-05-23 1978-10-24 Tandy Corporation Moisture sensor
SE409662B (en) * 1977-12-28 1979-09-03 Alfa Laval Ab DEVICE FOR LEAK INDICATION AT A CENTRIFUGAL SEPARATOR
US4227190A (en) * 1979-02-26 1980-10-07 Kelley Jerry K Water alarm for monitoring floor moisture
US4535637A (en) * 1979-04-19 1985-08-20 Wilgood Corporation Flow detection apparatus
JPS5624542A (en) * 1979-08-03 1981-03-09 Omron Tateisi Electronics Co Detecting method of leakage of liquid
US4319232A (en) * 1980-03-19 1982-03-09 Westphal Frank C Liquid leakage detector
CA1168707A (en) * 1980-04-22 1984-06-05 Norscan Instruments Ltd. Apparatus to monitor electrical cables, including splice joints and the like for the ingress of moisture
US4502044A (en) * 1982-05-19 1985-02-26 Farris James R Moisture alarm system
US5034135A (en) * 1982-12-13 1991-07-23 William F. McLaughlin Blood fractionation system and method
US4599609A (en) * 1984-12-05 1986-07-08 Allied Corporation Personal liquid chemical agent detector
ATE86040T1 (en) * 1985-06-12 1993-03-15 Raychem Corp HYDROCARBON SENSOR.
US4985696A (en) * 1986-11-20 1991-01-15 Lagoven S.A. Electronic controller by resistivity of water-oil interface
US4760383A (en) * 1986-12-08 1988-07-26 Dilorenzo Daniel J Enuresis treatment system
US5104526A (en) * 1987-01-30 1992-04-14 Baxter International Inc. Centrifugation system having an interface detection system
US4940543A (en) * 1987-01-30 1990-07-10 Baxter International Inc. Plasma collection set
US4909070A (en) * 1987-10-12 1990-03-20 Smith Jeffery B Moisture sensor
US4942612A (en) * 1988-01-14 1990-07-17 Huck Wu Leakage current preventing means for a drier
US4812778A (en) * 1988-01-25 1989-03-14 Electro-Mechanics, Inc. Isolation amplifier
US5077526A (en) * 1988-03-30 1991-12-31 Automated Light Technologies, Inc. Cable failure detection system
US5232588A (en) * 1991-10-29 1993-08-03 Edd D. Gryder Environmentally beneficial bypass filter system for use with low pressure centrifugal refrigeration equipment
DE69232149T2 (en) * 1991-12-02 2002-06-06 Canon Kk gauge
US5469145A (en) * 1992-05-29 1995-11-21 Johnson; Lonnie Wet diaper detector
US5445178A (en) * 1994-02-18 1995-08-29 Feuer; Lenny Soil moisture sensor
US5534790A (en) * 1994-04-13 1996-07-09 International Business Machines Corporation Current transition rate control circuit
US5606264A (en) * 1995-04-21 1997-02-25 Licari; James J. Moisture sensor for electronic modules
KR100196535B1 (en) * 1996-07-16 1999-06-15 손욱 Leakage detection apparatus of secondary battery

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9950105B2 (en) 2007-02-09 2018-04-24 Baxter International Inc. Blood treatment and electrical blood leak detection device therefore
US10463778B2 (en) 2007-02-09 2019-11-05 Baxter International Inc. Blood treatment machine having electrical heartbeat analysis

Also Published As

Publication number Publication date
CA2282628C (en) 2006-11-07
US6038914A (en) 2000-03-21
JP2001517303A (en) 2001-10-02
WO1998038485A3 (en) 1999-02-18
EP0980513A2 (en) 2000-02-23
WO1998038485A2 (en) 1998-09-03
AU6538998A (en) 1998-09-18
NZ337335A (en) 2001-05-25
AU724237B2 (en) 2000-09-14
EP0980513A4 (en) 2002-06-19
IL131470A0 (en) 2001-01-28

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed
MKLA Lapsed

Effective date: 20090227