GB1087849A - Respirator, narcosis apparatus or the like having a delayed release safety valve - Google Patents
Respirator, narcosis apparatus or the like having a delayed release safety valveInfo
- Publication number
- GB1087849A GB1087849A GB3433/65A GB343365A GB1087849A GB 1087849 A GB1087849 A GB 1087849A GB 3433/65 A GB3433/65 A GB 3433/65A GB 343365 A GB343365 A GB 343365A GB 1087849 A GB1087849 A GB 1087849A
- Authority
- GB
- United Kingdom
- Prior art keywords
- conduit
- safety valve
- slide
- valve
- shaft
- 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
- 230000003111 delayed effect Effects 0.000 title abstract 3
- 208000010513 Stupor Diseases 0.000 title 1
- 230000000241 respiratory effect Effects 0.000 abstract 2
- 238000010276 construction Methods 0.000 abstract 1
- 230000001419 dependent effect Effects 0.000 abstract 1
- 239000007788 liquid Substances 0.000 abstract 1
- 210000004072 lung Anatomy 0.000 abstract 1
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. ventilators; Tracheal tubes
- A61M16/10—Preparation of respiratory gases or vapours
- A61M16/104—Preparation of respiratory gases or vapours specially adapted for anaesthetics
-
- 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. ventilators; Tracheal tubes
- A61M16/0057—Pumps therefor
- A61M16/0063—Compressors
-
- 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. ventilators; Tracheal tubes
- A61M16/021—Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators; Tracheal tubes operated by electrical 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
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators; Tracheal tubes
- A61M16/08—Bellows; Connecting tubes ; Water traps; Patient circuits
- A61M16/0866—Passive resistors therefor
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Public Health (AREA)
- Engineering & Computer Science (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Pulmonology (AREA)
- Animal Behavior & Ethology (AREA)
- Hematology (AREA)
- General Health & Medical Sciences (AREA)
- Emergency Medicine (AREA)
- Veterinary Medicine (AREA)
- Safety Valves (AREA)
- Respiratory Apparatuses And Protective Means (AREA)
- Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
Abstract
1,087,849. Respiratory apparatus. C. G. D. ENGSTROM. Jan. 26, 1965 [Feb. 6, 1964], No. 3433/65. Heading A5T. Respiratory apparatus supplied with gas under pressure includes at least one safety valve, the or one safety valve being responsive to excess pressure and having a delayed opening mechanism. Gas entering the apparatus through flowmeters 11 is rhythmically compressed by a compressor 10 and flows to an attachment 15 for connection to the patients' lungs through a non-return valve 13, a liquid trap 18 forming a safety valve being located in the supply conduit 12. A safety valve 20 with delayed release is located in the exhalation conduit 16 or the supply conduits 12, 14 and comprises a slide 30 slidable in a sleeve 31 attached to the conduit, a branch 33 of the conduit opening into the sleeve and being normally closed by the slide. The slide is connected by a rod 28 to a piston 21 movable against a spring 35 in a cylinder 21 by pressure in a conduit 24. Conduit 24 is connected with the conduit 16 through a non-return valve 27 and a restriction 25 in parallel. In the event of an overpressure in the conduit 16, the piston moves the slide until the branch conduit 33 registers with a vent passage 32 in the slide, the delay in opening of the valve being determined by the initial distance between the branch conduit outlet and the registering portion of the vent passage. In alternative constructions (Figures 3 and 5, not shown), the piston is replaced by a diaphragm (71) responsive to an overpressure in the conduit to move a shaft (72) towards 'the stem (96) of a safety valve (92). The shaft opens the safety valve after a time delay dependent on the degree of overpressure and the initial distance between the shaft and the safety valve stem. The shaft attached to the diaphragm may form a displaceable contact (162, Figure 6) which makes the circuit of a solenoid (155) to open the safety valve (153), the distance travelled by the shaft before making the circuit determining the time delay of the valve. Alternatively, the safety valve comprises a piston (178, Figure 7) which is moved against a spring (179) in a cylinder (170) directly by the overpressure in the conduit to uncover vent openings (180) in the cylinder.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE147464 | 1964-02-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1087849A true GB1087849A (en) | 1967-10-18 |
Family
ID=20258240
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3433/65A Expired GB1087849A (en) | 1964-02-06 | 1965-01-26 | Respirator, narcosis apparatus or the like having a delayed release safety valve |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE1491698C3 (en) |
| FR (1) | FR1427283A (en) |
| GB (1) | GB1087849A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3814091A (en) * | 1972-01-17 | 1974-06-04 | M Henkin | Anesthesia rebreathing apparatus |
| FR2203647B1 (en) * | 1972-10-24 | 1975-12-12 | Minerve Sa | |
| DE2715003C3 (en) * | 1977-04-04 | 1981-03-26 | Drägerwerk AG, 23558 Lübeck | Pressure relief valve for use in ventilators |
| DE102009060839A1 (en) * | 2009-09-24 | 2011-03-31 | Tauchtechnik Schmitt Gmbh | Rebreather |
-
1965
- 1965-01-26 GB GB3433/65A patent/GB1087849A/en not_active Expired
- 1965-02-05 DE DE1491698A patent/DE1491698C3/en not_active Expired
- 1965-02-05 FR FR4540A patent/FR1427283A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE1491698B2 (en) | 1973-10-25 |
| FR1427283A (en) | 1966-02-04 |
| DE1491698C3 (en) | 1974-05-22 |
| DE1491698A1 (en) | 1969-05-29 |
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