GB2021290A - Automatic flow control - Google Patents
Automatic flow controlInfo
- 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
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>
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)
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 |
-
1979
- 1979-05-10 GB GB7916191A patent/GB2021290B/en not_active Expired
Cited By (11)
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 |