GB2205167A - Universal flow sensor - Google Patents

Universal flow sensor Download PDF

Info

Publication number
GB2205167A
GB2205167A GB08811907A GB8811907A GB2205167A GB 2205167 A GB2205167 A GB 2205167A GB 08811907 A GB08811907 A GB 08811907A GB 8811907 A GB8811907 A GB 8811907A GB 2205167 A GB2205167 A GB 2205167A
Authority
GB
United Kingdom
Prior art keywords
flow sensor
stated
sensor
magnet
magnetic field
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.)
Withdrawn
Application number
GB08811907A
Other versions
GB8811907D0 (en
Inventor
Ronald James Care
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.)
Individual
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 GB8811907D0 publication Critical patent/GB8811907D0/en
Publication of GB2205167A publication Critical patent/GB2205167A/en
Withdrawn legal-status Critical Current

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
    • G01F1/20—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 detection of dynamic effects of the flow
    • G01F1/28—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 detection of dynamic effects of the flow by drag-force, e.g. vane type or impact flowmeter
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
    • G01F15/06—Indicating or recording devices
    • G01F15/065—Indicating or recording devices with transmission devices, e.g. mechanical
    • G01F15/066—Indicating or recording devices with transmission devices, e.g. mechanical involving magnetic transmission devices

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Indicating Or Recording The Presence, Absence, Or Direction Of Movement (AREA)
  • Measuring Volume Flow (AREA)

Abstract

A flow sensor comprising a magnet (1) movable by the flow, and a magnetic field sensor (3) produces mechanical or electronic data. The magnet (1) may be encapsulated and be moved in a linear, angular or rotational manner. The movement is detected by a sensor (3) which is adjustable. The output may be of visual, audible, mechanical or electronic form. <IMAGE>

Description

THIS INVENTION IS A SUPPLENFNT TO PATENT APPLICATION NO. 8712223 ELECTRONIC AUTO FLOW CONTROL THIS INVENTION RELATES TO FLOW SENSING/DETECTION WHICH MAY BE APPLIED TO THE SENSING, WITHIN PIPING OR EXTERNAL TO PIPING, OF WATER OR OTHER LIQUIDS, GASES OR AIR.
ACCORDING TO THE PRESENT INVENTION THERE IS PROVIDED A METHOD OF DETECTING THE FLOW OF WATER/GAS/AIR BY MEANS OF A MAGNET OR THE LIKE PLACED IN THE PATH OF THE FLOW. THE MAGNET IS DISTURBED BY ANY FLOW OCCURRING. THE SAID MAGNET MAY MOVE IN A LINEAR, ANGULAR OR ROTATIONAL WAY. WITHIN THE FIELD OR EXTERNAL TO THE FIELD OF THE MAGNET IS PLACED A MAGNETIC FIELD ACTIVATED SWITCH OR SENSOR I.E. REED SWITCH OR HALL EFFECT SWITCH, WHICH WHEN SUBJECTED TO SUCH A MAGNETIC FIELD A CIRCUIT IS CLOSED OR A LOGIC STATE IS PRODUCED I.E. O OR 1 OR MULTIPLES THEREOF.
THE LINEAR OR SINGLE MOVEMENT MAGNET ACTUATOR WILL PRODUCE A SIMPLE ON OR OFF STATUS WITH VARIABLE SENSITIVITY TO THE MAGNET'S MOVEMENT PROVIDED BY ADJUSTING THE MAGNET'S MOVEMENT OR THE SENSORS SENSING RANGE.
THE ROTARY MAGNET ROTATES ABOUT AN AXIS WITH FLOW PRESENT AND WILL ROTATE AT A SPEED PRESET OR DETERMINED BY THE AMOUNT OF FLOW. ON ROTATING, THE SENSOR WILL PRODUCE A PULSE EVERY TIME A MAGNET PASSES THE SAID SENSOR'S RANGE.
A THIRD ALTERNATIVE IS A MAGNET WHICH IS HELD IN PlACE BY A SPRING, WHICH MAY BE METAL OR PLASTIC IN CONTSTRUCTION. THE FLOW IN THIS CASE WILL PUSH THE MAGNET AGAINST THE SPRING AND THE SAID MAGNET'S MOVEMENT IS DETECTED BY A SENSOR AN EXAMPLE OF OPERATION WILL NOW FOLLOW REFERRING TO FIG. 1.
AN ENCAPSUsASED MAGNET t1) is FIXED 10 A MOVEABLE ARM (7) WHICH IS FIXED AT ONE END TO A PIVOT (2) THE ARM IS RESTING IN A POSITION HELD BY ITS OWN WEIGHT. EXTERNAL TO THE PIPE CHAMBER (5) IS MOUNTED A MOVEABLE SENSOR (3) WHICH IS ADJUST ABLE BY ADJUSTER(6).
THE SENSOR IS ACTIVATED BY THE PRESENCE OF, MAGNETIC FIELD OR VARYING MAGNETIC FIELD, WHICH IN THIS CASE IS PRODUCED BY MAGNET(1). NOW CONSIDER A FLOW OF WATER/GAS/AIR MOVING IN DIRECTION MARKED "FLOW". THE ARM (7) MOVES TOWARDS THE TOP OF THE CHAMBER (5) PUSHING MAGNET (1) CLOSER TO THE SENSOR (3) PRODUCING LINEAR OR LOGIC OUTPUT AT OUTPUT (4) THE CHAMBER (5) IS MADE OF A MATERIAL NOT AFFECTED BY MAGNETIC FIELD OR WILL NOT AFFECT THE MAGNET'S FIELD, BUT THIS IS NOT ESSENTIAL.
ThE FOu.Gt;iN( EXAMPLE REFERS TO FIG. 2.
A CHAMBER (5) ENCLOSES A ROTATABLE VANE (6) WHICH IS ABLE TO ROTATE ABOUT ON AXIS (2) WHEN A FLOW OF WATER/GAS/AIR IS PRESENT IN EITHER DIRECTION. AT THE OUTER WINGS OF THE VANE (6) IS PLACED ONE OR MORE MAGNETS (1) EXTERNAL TO THE CHAMBER (5) IS FIXED A MOVEABLE SENSOR (3, WHICH MAY BE ADJUSTED BY ADGJSJER (7). AN OUTPUT AT OUTPUT (4) IS PRODUCED EVERY TIME A MAGNET IS CAUSED TO PASS THE SENSOR DUE TO A FLOW OF WATER/GAS/AIR.
A FURTHER EXAMPLE WILL NOW BE DESCRIBED WITH REFERENCE TO FIG. 3.
A MAGNET (1) PLACED EXTERN TO A CHAMBER/PIPE (5) AND OPPOSITE IS FIXED A SENSOR (3) ACTIVATED BY MAGNETIC FIELDS PRODUCED BY MAGNET (1) INSIDE THE CHAMBER (5) IS PLACED A PLUNGER/ LEVER OR THE LIKE (6) CAPABLE OF DEFLECTING OR DISPERSING THE MAGNETIC FIELD PRODUCED BY SAID MAGNET (1) IS SO ARRANGED THAT A FLOW OF GAS, AIR, FLUID FLOWING IN DIRECTION MARKED FLOW WILL PUSH PLUNGER/LEVER AGAINST SPRING (7) WHEN PLUNGER/LEVER OBSTRUCTS MAGNETIC FIELD FROM MAGNET (1) SENSOR (3) REACTS PRODUCING AN OUTPUT AT OUTPUT (4) SENSOR (3) MAY BE ADJUSTED BY ADJUSTER (2) AND MAGNET MAY BE ADJUSTED USING ADJUSTER (8) OR ANY COMBINATION THEREOF. MAGNETIC FIELD MAY BE PRODUCED USING PERMANENT MAGNET OR ELECTROMAGNET.

Claims (20)

C LAIMS
1) A FLOW SENSOR COMPRISING A MOVING ARM WITH AN ENCAPSULAT- ED MAGNET FIXED TO ONE SIDE, FIXED TO A PIVOT. THE ARM IS PLACED IN THE PATH OF A MOVING ELEMENT I.E. WATER/ GAS/AIR. THE MOVING ELEMENT MOVES THaE ARM AND ACCORD INGLY A SENSOR SYMPATHETIC TO CHANGING MAGNETIC PROPERTIES.
THE CHANGE IN STATE OF TIIE SAID SENSOR MA'1 HAVE MECHAN1ICAL, ELECTRONIC OR CHEMICAL PROPERTIES. THE OUTPUT OF THE SAID SENSOR MAY GIVE AN AUDIBLE OR VISUAL INDICATION OF ITS STATUS.
2) A FLOW SENSOR AS STATED IN CLAIM 1 COMPRISING A ROTARY VANE. ITS OUTER-MOST POINT HAS AFFIXED A MAGNET OR MAGNETS SO POSITIONED ON AN AXIS THAT ELEMENTS MOVING IN EITHER DIRECTION WILL CAUSE THE SAID VANE TO ROTATE ABOUT ITS AXIS PRODUCING CHANGING STATES IN THE MAGNETIC FIELD SENSOR ASSOCIATED WITH THE DEVICE.
3) A FLOW SENSOR AS STATED IN CLAIM 1 COMPRISING A PLUNGER, CONTAINING AN ENCAPSULATED OR NON ENCAPSULATED MAGNET.
THE SAID PLUNGER IS HELD IN POSITION BY A SPRING OF THE COILED OR HAIRPIN VARIETY. A MOVING ELEMENT CAUSES THE PLUNGER TO MOVE IN A DIRECTION OPPOSING OR PREDETERMINED BY THE SAID SPRINGS.
4) A FLOW SENSOR AS STATED IN ANY OF THE PREVIOUS CLAIMS, ITS PROPERTIES ARE SUCH THAT THE PRESENCE OF, OR VARIATION OF, A MAGNETIC FIELD WILL CREATE AN OPEN OR CLOSED SWITCH EFFECT IN A MECHANIC.4T. FORM.
5) A FLOW SENSOR AS STATED IN CLAIMS 1, 2 AND 3 ITS PROPERTIES ARE SUCH THAT THE PRESENCE OF, OR VARIATION OF A MAGNETIC FIELD WILL PRODUCE AN ELECTRICAL SIGNAL IN LINEAR FORM.
6) A FLOW SENSOR AS STATED IN CLAIMS 1, 2 AND 3 ITS PROPERTIES ARE SUCH THAT THE PRESENCE OF, OR VARIATION OF A MAGNETIC FIELD WILL PRODUCE A SIGNAL IN ELECTRONIC DIGITAL FORM.
7) A FLOW SENSOR AS STATED IN CLAIMS 1, 2 AND 3 ITS PROPERTIES ARE SUCH THAT THE PRESENCE OF, OR VARIATION IN A MAGNETIC FIELD WILL PRODUCE A CHEMICAL REACTION.
8) A FLOW SENSOR AS STATED IN ANY OF THE PREVIOUS CLAIMS MAY BE INTERFACED WITH FLOW CONTROL APPARATUS I.E. STOP VALVE OR THE LIKE.
9) A FLOW SENSOR AS STATED IN ANY OF THE PREVIOUS CLAIMS MAY BE ARMED IN READINESS BY CONTROLLING/MONITORING APPARATUS I.E.
BURGLAR ALARMS AND THE LIKE.
10) A FLOW SENSOR AS STATED IN CLAIMS 4, 5 AND 6 ITS SENSING ABILITY IS FULLY ADJUSTABLE BY MOVEMENT OF THE SENSOR IN ANY DIRECTION.
11) A FLOW SENSOR AS STATED IN ANY OF THE PREVIOUS CLAIMS MAY GIVE OFF AN AUDIBLE INDICATION OF ITS STATE.
12) A FLOW SENSOR AS STATED IN ANY OF THE PREVIOUS CLAIMS W GIVE OFF A VISUAL INDICATION OF ITS STATE.
19) A FLOW SENSOR AS STATED IN ANY OF THE PREVIOUS CLAIMS MAY GIVE OFF AN AUDIBLE AND A VISUAL INDICATION OF ITS STATE.
14) A FLOW SENSOR AS STATED IN ANY OF THE PREVIOUS CLAIMS MAY BE INTERFACED WITH A MICROPROCESSOR PROGRAMMER OR CALCULATING CIRCUIT.
15) A FLOW SENSOR AS STATED IN ANY OF THE PREVIOUS CLAIMS MAY BE ANABLED OR DISABLED REMOTELY BY ASSOCIATED REMOTE CONTROLS.
16) A FLOW SENSOR WITH A MAGNET FIXED EXTERNAL TO THE CHAMBER/ PIPING.
17) A FLOW SENSOR AS STATED IN CLAIM 16 THERE IS PLACED A PLUNGER/ LEVER OR THE LIKE CAPABLE OF OBSTRUCTING A MAGNETIC FIELD.
18) A FLOW SENSOR AS STATED IN CLAIMS 16, AND 7 WITH ADJUSTABLE MAGNET.
19) A FLOW SENSOR AS STATED IN CLAIMS 16, 17 AND 18 WITH ADJUSTABLE MAGNET AND ADJUSTABLE SENSING DEVICE.
20) A FLOW SENSOR AS STATED IN CLAIMS 16, 17, 18 AND 19 WHERE MAGNETIC FIELD IS PRODUCED BY AN ELECTROMAGNET OR PERMANENT MAGNET.
GB08811907A 1987-05-23 1988-05-20 Universal flow sensor Withdrawn GB2205167A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB878712223A GB8712223D0 (en) 1987-05-23 1987-05-23 Electronic auto flow control

Publications (2)

Publication Number Publication Date
GB8811907D0 GB8811907D0 (en) 1988-06-22
GB2205167A true GB2205167A (en) 1988-11-30

Family

ID=10617819

Family Applications (2)

Application Number Title Priority Date Filing Date
GB878712223A Pending GB8712223D0 (en) 1987-05-23 1987-05-23 Electronic auto flow control
GB08811907A Withdrawn GB2205167A (en) 1987-05-23 1988-05-20 Universal flow sensor

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB878712223A Pending GB8712223D0 (en) 1987-05-23 1987-05-23 Electronic auto flow control

Country Status (1)

Country Link
GB (2) GB8712223D0 (en)

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998036245A1 (en) * 1997-02-14 1998-08-20 Resmed Limited An apparatus for indicating the flow rate of a fluid through a conduit
WO1999034154A1 (en) * 1997-12-29 1999-07-08 Merloni Termosanitari S.P.A. Safety device for detecting a flow of fumes inside an exhaust pipe
US6006748A (en) 1996-10-16 1999-12-28 Resmed Limited Vent valve apparatus
USD421298S (en) 1998-04-23 2000-02-29 Resmed Limited Flow generator
US6029660A (en) 1996-12-12 2000-02-29 Resmed Limited Substance delivery apparatus
US6091973A (en) 1995-04-11 2000-07-18 Resmed Limited Monitoring the occurrence of apneic and hypopneic arousals
US6119723A (en) 1997-02-14 2000-09-19 Resmed Limited, Apparatus for varying the flow area of a conduit
US6152129A (en) 1996-08-14 2000-11-28 Resmed Limited Determination of leak and respiratory airflow
US6182657B1 (en) 1995-09-18 2001-02-06 Resmed Limited Pressure control in CPAP treatment or assisted respiration
US6214239B1 (en) * 1996-12-09 2001-04-10 Renau Corporation Water filter usage monitoring apparatus
US6213119B1 (en) 1995-10-23 2001-04-10 Resmed Limited Inspiratory duration in CPAP or assisted respiration treatment
US6237592B1 (en) 1995-07-03 2001-05-29 Resmed Limited Auto-calibration of pressure transducer offset
US6240921B1 (en) 1993-12-01 2001-06-05 Resmed, Ltd. Automated stop/start control in the administration of CPAP treatment
US6253764B1 (en) 1996-05-08 2001-07-03 Resmed, Ltd. Control of delivery pressure in CPAP treatment or assisted respiration
US6336454B1 (en) 1997-05-16 2002-01-08 Resmed Limited Nasal ventilation as a treatment for stroke
US6397841B1 (en) 1997-06-18 2002-06-04 Resmed Limited Apparatus for supplying breathable gas
US6532957B2 (en) 1996-09-23 2003-03-18 Resmed Limited Assisted ventilation to match patient respiratory need
WO2004101121A1 (en) * 2003-05-13 2004-11-25 A.L. Hadas Technologies Ltd. Apparatus for measuring volumetric or mass fluid flow
US7931023B2 (en) 1991-12-20 2011-04-26 Resmed Limited Patient interface assembly for CPAP respiratory apparatus
US20160135899A1 (en) * 2014-11-11 2016-05-19 Intuitive Surgical Operations, Inc. Flow indicators for surgical instrument reprocessing, and related systems and methods

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB518897A (en) * 1938-09-07 1940-03-11 Westinghouse Brake & Signal Improvements relating to devices for indicating the rate of flow of air or other gases
GB590945A (en) * 1943-10-18 1947-08-01 Fischer & Porter Co Alarm for flow meters and other instruments
GB598635A (en) * 1945-09-14 1948-02-23 Norman Owen Clark Improvements in or relating to rotary meters for foam and other plastic solids
GB1183503A (en) * 1967-06-16 1970-03-11 Kent Ltd G Improvements in or relating to the measurement of fluid flow
GB1201441A (en) * 1969-01-29 1970-08-05 Conflow Ltd Improvements in flowmeters
GB1320878A (en) * 1971-01-26 1973-06-20 Platon Ltd G A Flow memters
GB1389720A (en) * 1971-12-03 1975-04-09 Alfa Laval Ab Liquid flow indicators
GB2097542A (en) * 1981-04-01 1982-11-03 Hydrotechnik Gmbh Turbine flow meters

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB518897A (en) * 1938-09-07 1940-03-11 Westinghouse Brake & Signal Improvements relating to devices for indicating the rate of flow of air or other gases
GB590945A (en) * 1943-10-18 1947-08-01 Fischer & Porter Co Alarm for flow meters and other instruments
GB598635A (en) * 1945-09-14 1948-02-23 Norman Owen Clark Improvements in or relating to rotary meters for foam and other plastic solids
GB1183503A (en) * 1967-06-16 1970-03-11 Kent Ltd G Improvements in or relating to the measurement of fluid flow
GB1201441A (en) * 1969-01-29 1970-08-05 Conflow Ltd Improvements in flowmeters
GB1320878A (en) * 1971-01-26 1973-06-20 Platon Ltd G A Flow memters
GB1389720A (en) * 1971-12-03 1975-04-09 Alfa Laval Ab Liquid flow indicators
GB2097542A (en) * 1981-04-01 1982-11-03 Hydrotechnik Gmbh Turbine flow meters

Cited By (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7931023B2 (en) 1991-12-20 2011-04-26 Resmed Limited Patient interface assembly for CPAP respiratory apparatus
US6240921B1 (en) 1993-12-01 2001-06-05 Resmed, Ltd. Automated stop/start control in the administration of CPAP treatment
US6363270B1 (en) 1995-04-11 2002-03-26 Resmed Limited Monitoring the occurrence of apneic and hypopneic arousals
US6091973A (en) 1995-04-11 2000-07-18 Resmed Limited Monitoring the occurrence of apneic and hypopneic arousals
US6237592B1 (en) 1995-07-03 2001-05-29 Resmed Limited Auto-calibration of pressure transducer offset
US6526974B1 (en) 1995-09-18 2003-03-04 John William Ernest Brydon Pressure control in CPAP treatment or assisted respiration
US6182657B1 (en) 1995-09-18 2001-02-06 Resmed Limited Pressure control in CPAP treatment or assisted respiration
US6213119B1 (en) 1995-10-23 2001-04-10 Resmed Limited Inspiratory duration in CPAP or assisted respiration treatment
US6253764B1 (en) 1996-05-08 2001-07-03 Resmed, Ltd. Control of delivery pressure in CPAP treatment or assisted respiration
US6152129A (en) 1996-08-14 2000-11-28 Resmed Limited Determination of leak and respiratory airflow
US7644713B2 (en) 1996-09-23 2010-01-12 Resmed Limited Method and apparatus for determining instantaneous leak during ventilatory assistance
US8051853B2 (en) 1996-09-23 2011-11-08 Resmed Limited Method and apparatus for providing ventilatory assistance
US9974911B2 (en) 1996-09-23 2018-05-22 Resmed Limited Method and apparatus for providing ventilatory assistance
US8733351B2 (en) 1996-09-23 2014-05-27 Resmed Limited Method and apparatus for providing ventilatory assistance
US6810876B2 (en) 1996-09-23 2004-11-02 Resmed Ltd. Assisted ventilation to match patient respiratory need
US6688307B2 (en) 1996-09-23 2004-02-10 Resmed Limited Methods and apparatus for determining instantaneous elastic recoil and assistance pressure during ventilatory support
US6532957B2 (en) 1996-09-23 2003-03-18 Resmed Limited Assisted ventilation to match patient respiratory need
US9770571B2 (en) 1996-10-16 2017-09-26 Resmed Limited Vent valve assembly
US8997739B2 (en) 1996-10-16 2015-04-07 Resmed Limited Vent valve apparatus
US6006748A (en) 1996-10-16 1999-12-28 Resmed Limited Vent valve apparatus
US6214239B1 (en) * 1996-12-09 2001-04-10 Renau Corporation Water filter usage monitoring apparatus
US6029660A (en) 1996-12-12 2000-02-29 Resmed Limited Substance delivery apparatus
US6119723A (en) 1997-02-14 2000-09-19 Resmed Limited, Apparatus for varying the flow area of a conduit
WO1998036245A1 (en) * 1997-02-14 1998-08-20 Resmed Limited An apparatus for indicating the flow rate of a fluid through a conduit
US6776155B2 (en) 1997-05-16 2004-08-17 Resmed Limited Nasal ventilation as a treatment for stroke
US6336454B1 (en) 1997-05-16 2002-01-08 Resmed Limited Nasal ventilation as a treatment for stroke
US6397841B1 (en) 1997-06-18 2002-06-04 Resmed Limited Apparatus for supplying breathable gas
WO1999034154A1 (en) * 1997-12-29 1999-07-08 Merloni Termosanitari S.P.A. Safety device for detecting a flow of fumes inside an exhaust pipe
USD421298S (en) 1998-04-23 2000-02-29 Resmed Limited Flow generator
AU2004238100B2 (en) * 2003-05-13 2009-07-16 A.L. Hadas Technologies Ltd. Apparatus for measuring volumetric or mass fluid flow
WO2004101121A1 (en) * 2003-05-13 2004-11-25 A.L. Hadas Technologies Ltd. Apparatus for measuring volumetric or mass fluid flow
US20160135899A1 (en) * 2014-11-11 2016-05-19 Intuitive Surgical Operations, Inc. Flow indicators for surgical instrument reprocessing, and related systems and methods
US9921094B2 (en) * 2014-11-11 2018-03-20 Intuitive Surgical Operations, Inc. Flow indicators for surgical instrument reprocessing, and related systems and methods

Also Published As

Publication number Publication date
GB8811907D0 (en) 1988-06-22
GB8712223D0 (en) 1987-07-01

Similar Documents

Publication Publication Date Title
GB2205167A (en) Universal flow sensor
US5117693A (en) Liquid level sensor
JP3164924B2 (en) Flow switch assembly for fluid flow monitoring
FR2673261B1 (en) VALVE FORMING DEVICE.
US4691185A (en) Solid state magnetic microswitch
CA2024157A1 (en) Hall effect signalling gauge
US5931044A (en) Torque/position transducer
JPH08326950A (en) Valve open/close condition detecting device
CA1297577C (en) Monitoring of movable components
US4906807A (en) Apparatus for monitoring the flow of fluid media in a pipeline
US20010048089A1 (en) Flow control valve assembly
US4173150A (en) Sensor with adjustable pressure responsive detection and control
KR840008581A (en) Acoustic temperature alarm for cooking vessel
US4992633A (en) Contained pressure activated switch
US5333160A (en) Control rod position transmitter
US3240062A (en) Flow-controlling apparatus
EP0602959B1 (en) Bidirectional pipeline pig signaling device
US3065635A (en) Long travel magnetic follower device
US5722286A (en) Torque/position transducer
JPS6469874A (en) Mass flow controller
US4811001A (en) Shaft speed monitor
US4713654A (en) Shaft speed monitor
GB2087570A (en) Fluid flow sensors
WO2001098699A1 (en) A driving device including a position indicator
RU2079113C1 (en) Level gauge of type of drive transducer for reservoirs

Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)