GB2021290A - Automatic flow control - Google Patents

Automatic flow control

Info

Publication number
GB2021290A
GB2021290A GB7916191A GB7916191A GB2021290A GB 2021290 A GB2021290 A GB 2021290A GB 7916191 A GB7916191 A GB 7916191A GB 7916191 A GB7916191 A GB 7916191A GB 2021290 A GB2021290 A GB 2021290A
Authority
GB
United Kingdom
Prior art keywords
controller
drip rate
drip
comparison
varies
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
GB7916191A
Other versions
GB2021290B (en
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.)
FRENSHORE Ltd
Original Assignee
FRENSHORE Ltd
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 FRENSHORE Ltd filed Critical FRENSHORE Ltd
Priority to GB7916191A priority Critical patent/GB2021290B/en
Publication of GB2021290A publication Critical patent/GB2021290A/en
Application granted granted Critical
Publication of GB2021290B publication Critical patent/GB2021290B/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D7/00—Control of flow
    • G05D7/06—Control of flow characterised by the use of electric means
    • G05D7/0617—Control of flow characterised by the use of electric means specially adapted for fluid materials
    • G05D7/0629—Control of flow characterised by the use of electric means specially adapted for fluid materials characterised by the type of regulator means
    • G05D7/0635—Control of flow characterised by the use of electric means specially adapted for fluid materials characterised by the type of regulator means by action on throttling means
    • 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
    • A61M5/16886—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 for measuring fluid flow rate, i.e. flowmeters
    • A61M5/1689—Drip counters

Landscapes

  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Hematology (AREA)
  • Animal Behavior & Ethology (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Fluid Mechanics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Vascular Medicine (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Abstract

A liquid drop rate controller for controlling flow of fluid from an infusion fluid reservoir 2 to an intravenous infusion site which includes a cam means 10 in the form of a wheel 24 mounted eccentrically on a shaft which varies the compression on a flexible tube 4 carrying the liquid; the controller 12 senses the actual drip rate optically and compares this to a preselected desired drip rate set in thumbwheel switches 22 and varies the compression accordingly. The comparison is accomplished electronically by the generation of a time base whose frequency is controlled by the selected drip rate; this time base is compared to the actual drip rate observed by the optical sensing means, and the cam means is controlled in relation to an error signal obtained through the comparison. The controller 12 includes a separate comparison circuit which comes into operation at low drip rates so to increase accuracy of control. <IMAGE>
GB7916191A 1978-05-19 1979-05-10 Automatic flow control Expired GB2021290B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB7916191A GB2021290B (en) 1978-05-19 1979-05-10 Automatic flow control

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB2071378 1978-05-19
GB7916191A GB2021290B (en) 1978-05-19 1979-05-10 Automatic flow control

Publications (2)

Publication Number Publication Date
GB2021290A true GB2021290A (en) 1979-11-28
GB2021290B GB2021290B (en) 1982-10-27

Family

ID=26254848

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7916191A Expired GB2021290B (en) 1978-05-19 1979-05-10 Automatic flow control

Country Status (1)

Country Link
GB (1) GB2021290B (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2118333A (en) * 1982-04-05 1983-10-26 Ipco Corp Infusion monitors
EP0111842A2 (en) * 1982-12-16 1984-06-27 Chesebrough-Pond's Inc. Gravity flow controller
EP0115276A2 (en) * 1983-01-24 1984-08-08 Siemens-Elema AB Fluid flow control device
GB2141227A (en) * 1983-06-09 1984-12-12 Ipco Corp Infusion monitor
EP0529569A2 (en) * 1991-08-23 1993-03-03 Genshiro Ogawa Apparatus for controlling the rate of dripping of intravenous fluid
CN112870478A (en) * 2021-02-25 2021-06-01 戴敏 Medical nursing infusion support

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2118333A (en) * 1982-04-05 1983-10-26 Ipco Corp Infusion monitors
EP0111842A2 (en) * 1982-12-16 1984-06-27 Chesebrough-Pond's Inc. Gravity flow controller
EP0111842A3 (en) * 1982-12-16 1985-01-02 Chesebrough-Pond's Inc. Gravity flow controller
EP0115276A2 (en) * 1983-01-24 1984-08-08 Siemens-Elema AB Fluid flow control device
EP0115276A3 (en) * 1983-01-24 1984-08-29 Siemens-Elema Ab Fluid flow control device
US4616801A (en) * 1983-01-24 1986-10-14 Siemens Elema Ab Apparatus to regulate the flow of liquids
GB2141227A (en) * 1983-06-09 1984-12-12 Ipco Corp Infusion monitor
FR2547200A1 (en) * 1983-06-09 1984-12-14 Ipco Corp INFUSION MONITOR
EP0529569A2 (en) * 1991-08-23 1993-03-03 Genshiro Ogawa Apparatus for controlling the rate of dripping of intravenous fluid
EP0529569A3 (en) * 1991-08-23 1993-11-24 Genshiro Ogawa Apparatus for controlling the rate of dripping of intravenous fluid
CN112870478A (en) * 2021-02-25 2021-06-01 戴敏 Medical nursing infusion support

Also Published As

Publication number Publication date
GB2021290B (en) 1982-10-27

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Legal Events

Date Code Title Description
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee