GB724801A - Improvements in or relating to protective oxygen respirators providing circulation of the respiration air - Google Patents
Improvements in or relating to protective oxygen respirators providing circulation of the respiration airInfo
- Publication number
- GB724801A GB724801A GB5033/53A GB503353A GB724801A GB 724801 A GB724801 A GB 724801A GB 5033/53 A GB5033/53 A GB 5033/53A GB 503353 A GB503353 A GB 503353A GB 724801 A GB724801 A GB 724801A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve
- oxygen
- diaphragm
- inhalation
- air
- 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
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B9/00—Component parts for respiratory or breathing apparatus
- A62B9/02—Valves
-
- 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
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B7/00—Respiratory apparatus
- A62B7/02—Respiratory apparatus with compressed oxygen or air
- A62B7/04—Respiratory apparatus with compressed oxygen or air and lung-controlled oxygen or air valves
Landscapes
- Health & Medical Sciences (AREA)
- Pulmonology (AREA)
- General Health & Medical Sciences (AREA)
- Emergency Medicine (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Biomedical Technology (AREA)
- Anesthesiology (AREA)
- Engineering & Computer Science (AREA)
- Heart & Thoracic Surgery (AREA)
- Hematology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Respiratory Apparatuses And Protective Means (AREA)
Abstract
724,801. Respiratory appliances. AUERGES. AKT.-GES. Feb. 23, 1953 [Feb. 23, 1952], No. 5033/53. Class 81 (2). A closed circuit respirator has a scavenging port opened by the exhalation valve and means for ensuring that the system contains a high proportion of oxygen on being taken into use. The inhalation and exhalation valves are mounted in a unit comprising a casing 4, Fig. 3, divided into two compartments by a partition 5. Air from the breathing bag is received through a connection 15 and passes to the mask through the inhalation valve 14. Air from the mask enters through a connection 2 and passes through exhalation valve 32 and pipe 8 to the carbon dioxide absorber and back to the breathing bag. On each occasion that the valve member 32 is raised it also opens a tube 10 leading to atmosphere through a restricted orifice 12, so that a small proportion of the contained air is expelled at each exhalation, thereby reducing the proportion of nitrogen retained. The main oxygen control valve, comprising a seating 44, Fig. 4, and plunger 46 is actuated through a connection 50 by a diaphragm 40 through the middle of which is a passage 52 restricted by a choke 54. The chamber 55 surrounding the latter is closed by a valve 58, 59 which is opened by inward movement of a second diaphragm 61. When oxygen is first turned on, it enters the control valve through duct 42 and, owing to the presence of choke 54, it causes a temporary excess pressure on the lower side of diaphragm 40 which opens the main valve 46 and allows a flow of oxygen into the system until the pressures on the two sides of the diaphragm are equalised, thus ensuring that a high proportion of oxygen exists before breathing commences. In order that there may be a minimum of stagnant air in the breathing bag at this time, a light spring is provided to maintain the bag in the collapsed condition when out of use. Oxygen from the control valve passes through a tube 21 to a connection 20, Fig. 3, adjacent to the inhalation valve and, at each inhalation, the reduction in pressure in the chamber 13 is communicated through port 16 and pipe 17, Fig. 4, to cause inward movement of the diaphragm 61 and venting of the space 55. This disturbs the balance of pressure on the two sides of diaphragm 40 and the main valve 46 is accordingly opened to admit a further supply of oxygen.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE724801X | 1952-02-23 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB724801A true GB724801A (en) | 1955-02-23 |
Family
ID=6634788
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB5033/53A Expired GB724801A (en) | 1952-02-23 | 1953-02-23 | Improvements in or relating to protective oxygen respirators providing circulation of the respiration air |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB724801A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3390676A (en) * | 1962-09-21 | 1968-07-02 | Drager Otto H | Protective breathing apparatus with regeneration of exhaled air |
US4498470A (en) * | 1982-01-28 | 1985-02-12 | Dragerwerk Ag | Respirator having circulating breathing gas |
CN105664390A (en) * | 2014-12-05 | 2016-06-15 | 德尔格安全股份两合公司 | Respiratory container for circulation-respiration protection equipment and circulation-respiration protection equipment |
US20160250504A1 (en) * | 2013-10-07 | 2016-09-01 | Dräger Safety AG & Co. KGaA | Cooling device for a protective respiratory apparatus |
CN108671437A (en) * | 2018-05-25 | 2018-10-19 | 浙江恒泰安全设备有限公司 | Novel oxygen respirator |
-
1953
- 1953-02-23 GB GB5033/53A patent/GB724801A/en not_active Expired
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3390676A (en) * | 1962-09-21 | 1968-07-02 | Drager Otto H | Protective breathing apparatus with regeneration of exhaled air |
US4498470A (en) * | 1982-01-28 | 1985-02-12 | Dragerwerk Ag | Respirator having circulating breathing gas |
US20160250504A1 (en) * | 2013-10-07 | 2016-09-01 | Dräger Safety AG & Co. KGaA | Cooling device for a protective respiratory apparatus |
US10463893B2 (en) * | 2013-10-07 | 2019-11-05 | Dräger Safety AG & Co. KGaA | Cooling device for a protective respiratory apparatus |
CN105664390A (en) * | 2014-12-05 | 2016-06-15 | 德尔格安全股份两合公司 | Respiratory container for circulation-respiration protection equipment and circulation-respiration protection equipment |
CN105664390B (en) * | 2014-12-05 | 2020-03-17 | 德尔格安全股份两合公司 | Breathing container for a circuit-breathing protective device and circuit-breathing protective device |
CN108671437A (en) * | 2018-05-25 | 2018-10-19 | 浙江恒泰安全设备有限公司 | Novel oxygen respirator |
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