GB1312558A - Anaesthetic vaporizers - Google Patents
Anaesthetic vaporizersInfo
- Publication number
- GB1312558A GB1312558A GB1312558DA GB1312558A GB 1312558 A GB1312558 A GB 1312558A GB 1312558D A GB1312558D A GB 1312558DA GB 1312558 A GB1312558 A GB 1312558A
- Authority
- GB
- United Kingdom
- Prior art keywords
- anaesthetic
- valve
- chamber
- carrier gas
- passes
- 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.)
- Expired
Links
Classifications
-
- 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
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
- A61M16/10—Preparation of respiratory gases or vapours
- A61M16/14—Preparation of respiratory gases or vapours by mixing different fluids, one of them being in a liquid phase
- A61M16/18—Vaporising devices for anaesthetic preparations
Landscapes
- Health & Medical Sciences (AREA)
- Anesthesiology (AREA)
- Emergency Medicine (AREA)
- Pulmonology (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Hematology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Temperature-Responsive Valves (AREA)
Abstract
1312558 Anaesthetic vaporizers LONGWORTH SCIENTIFIC INSTRUMENT CO Ltd 10 Feb 1972 [25 Feb 1971] 5476/71 Heading A5T [Also in Division F2] An anaesthetic vaporizer has an inlet 1 connectible to a supply of carrier gas and an outlet 24 to supply a mixture of carrier gas and entrained anaesthetic to the patient and incorporates a proportioning valve 7 which is settable to control the proportion of carrier gas which passes over the anaesthetic 20 and a valve assembly 18 comprising two cooperating valve members 30, 34 which define a fluid flow passage 36 whose size is variable by the relative movement of the valve members, one 30 of which is settable to provide a means of setting an upper limit on the above mentioned proportion and the other of which 34 is movable under the control of a temperature sensitive means 43. The one valve member 30 is a tapered needle which is screw-threadedly mounted in a housing 25 for axial adjustment relative to a valve seat provided by the other valve member 34. The needle may be conically or parabolically tapered or may be formed as a series of steps, the edges of which define a parabola. The other valve member can move in a bore 29 in the housing 25 and is urged downward by a spring 40 and engaged with a lever 40 which is moved by a temperaturesensitive capsule 43. The valve seat provided by member 34 may have an annular knife edge (50) (Fig. 3 not shown). In use the carrier gas passes into a chamber 3 from where some gas passes into a chamber 16 bypassing the anaesthetic chamber 19 whilst the remainder passes through valve assembly 18 into the chamber 19 containing anaesthetic and a wick 21. The vapourised anaesthetic is mixed with the by-passing carrier gas in chamber 16 and to the patient (e.g. via a mask) through outlet 24. The proportioning valve 7 is adjusted using the screw thread 9 on the shaft 8.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB547671 | 1971-02-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1312558A true GB1312558A (en) | 1973-04-04 |
Family
ID=9796917
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1312558D Expired GB1312558A (en) | 1971-02-25 | 1971-02-25 | Anaesthetic vaporizers |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1312558A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2177782A (en) * | 1985-07-10 | 1987-01-28 | Meynell Valves | Draining outlet |
GB2251189A (en) * | 1990-12-18 | 1992-07-01 | Instrumentarium Corp | Fluid vaporizing apparatus |
GB2279015A (en) * | 1993-06-14 | 1994-12-21 | Blease Medical Equipment Limit | Vaporizer flow path |
-
1971
- 1971-02-25 GB GB1312558D patent/GB1312558A/en not_active Expired
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2177782A (en) * | 1985-07-10 | 1987-01-28 | Meynell Valves | Draining outlet |
GB2251189A (en) * | 1990-12-18 | 1992-07-01 | Instrumentarium Corp | Fluid vaporizing apparatus |
US5337738A (en) * | 1990-12-18 | 1994-08-16 | Instrumentarium Corporation | Fluid vaporizing apparatus |
GB2251189B (en) * | 1990-12-18 | 1994-11-02 | Instrumentarium Corp | Fluid vaporizing apparatus |
GB2279015A (en) * | 1993-06-14 | 1994-12-21 | Blease Medical Equipment Limit | Vaporizer flow path |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |