EP0182581A2 - Appareil respiratoire en circuit fermé - Google Patents
Appareil respiratoire en circuit fermé Download PDFInfo
- Publication number
- EP0182581A2 EP0182581A2 EP85308211A EP85308211A EP0182581A2 EP 0182581 A2 EP0182581 A2 EP 0182581A2 EP 85308211 A EP85308211 A EP 85308211A EP 85308211 A EP85308211 A EP 85308211A EP 0182581 A2 EP0182581 A2 EP 0182581A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- carbon dioxide
- closed circuit
- counterlung
- absorbing medium
- dioxide absorbing
- 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.)
- Withdrawn
Links
Images
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
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B7/00—Respiratory apparatus
- A62B7/10—Respiratory apparatus with filter elements
Definitions
- This invention relates to closed circuit breathing apparatus incorporating means for removing carbon dioxide exhaled by the user.
- a closed circuit breathing apparatus incorporating a carbon dioxide absorbing medium characterized in that a chemical heat exchanger in the form of activated carbon is located in a position relative to the carbon dioxide absorbing medium to reduce the temperature and relative humidity of the exhaled purified air resulting from the exothermic reaction thereof.
- the activated carbon in the form of granules may be contained in a housing immediately adjacent to a housing containing the carbon dioxide absorbing medium in the form of soda lime whilst in a unidirectional type of closed circuit breathing apparatus, a housing containing soda lime can be sandwiched between two housings each containing activated carbon.
- the pendulum type breathing apparatus shown in Figure 1 comprises a mouthpiece 1 connected via a breathing tube 2 to a canister 3 having therein a chemical heat exchanger 4 in the form of an activated carbon granule pack and a pack of soda lime 5, the canister 3 being attached to a counterlung 7 having an oxygen intake valve 8 therein.
- Metal screens 6 covered with a fine filter paper are positioned one between the packs 4 and 5 and one at each end thereof to prevent dust from entering the breathing tube and counterlung.
- Both packs 4 and 5 are preferably replaceable within the canister 3 or alternatively the canister itself may be replaced by a new one having fresh activated carbon granule and soda lime packs 4 and 5 respectively.
- the activated carbon is a poor conductor of heat a large amount of heat and moisture is stored therein thus resulting in inhaled temperature levels significantly lower than those referred to above, for example between 42° and 48°C at a relative humidity of 70% or less. Such levels of temperature and relative humidity are very much more acceptable to the user.
- the activated carbon may be in granular form but other forms such as extrudate are also suitable.
- the chemical heat exchanger can also be used in a closed circuit breathing apparatus of the unidirectional type as shown in Figure 2.
- This apparatus comprises a mouthpiece 1 coupled by breathing tubes 2 and 9 having non-return valves 22 and 21 to a canister 3 and a counterlung 7 respectivaly.
- the canister 3 has a soda lime pack 5 sandwiched between two activated carbon granule packs 4 and a tube 10 connecting the canister 3 to the counterlung 7 which has an oxygen inlet valve 11 therein.
- the breath exhaled through the mouthpiece 1 via the non-return valve 22 passes into the canister containing the activated carbon packs 4 and soda lime pack 5 into the tube 10 and thence to the counterlung 7 into which oxygen is admitted through the inlet valve 11, the mixture then passing through the breathing tube 9, non-return valve 21 and into the mouthpiece 1 on inhalation. Again heat and moisture are trapped in the activated carbon granule packs 4 to reduce the temperature and relative humidity of the inhaled air to acceptable levels.
- the apparatus of Figure 2 may also incorporate metal screens 6 between the soda lime pack 5 and the activated carbon granule packs 4 and also at the inlet and outlet of the canister 3.
Landscapes
- Health & Medical Sciences (AREA)
- Pulmonology (AREA)
- General Health & Medical Sciences (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Respiratory Apparatuses And Protective Means (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8428689 | 1984-11-13 | ||
GB848428689A GB8428689D0 (en) | 1984-11-13 | 1984-11-13 | Closed circuit breathing apparatus |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0182581A2 true EP0182581A2 (fr) | 1986-05-28 |
EP0182581A3 EP0182581A3 (fr) | 1989-02-22 |
Family
ID=10569689
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP85308211A Withdrawn EP0182581A3 (fr) | 1984-11-13 | 1985-11-12 | Appareil respiratoire en circuit fermé |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0182581A3 (fr) |
GB (1) | GB8428689D0 (fr) |
ZA (1) | ZA858507B (fr) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2213387A (en) * | 1987-12-08 | 1989-08-16 | Sabre Safety Ltd | Closed circuit breathing apparatus |
EP0372859A2 (fr) * | 1988-12-01 | 1990-06-13 | Avstar Aerospace Corporation | Système respiratoire |
WO1995031367A1 (fr) * | 1994-05-14 | 1995-11-23 | Prism Life Support Systems Limited | Appareil respiratoire |
EP0818217A1 (fr) * | 1996-07-11 | 1998-01-14 | Commeinhes Remco | Appareil respiratoire à fonctionnement en circuit fermé |
US5794616A (en) * | 1993-11-17 | 1998-08-18 | Cochran Consulting, Inc. | Use of multiple gas blends with a dive computer |
US5899204A (en) * | 1993-11-17 | 1999-05-04 | Cochran Consulting, Inc. | Dive computer with wrist activation |
US6003513A (en) * | 1996-01-12 | 1999-12-21 | Cochran Consulting | Rebreather having counterlung and a stepper-motor controlled variable flow rate valve |
GB2458854B (en) * | 2007-03-09 | 2012-01-04 | Strata Products Worldwide Llc | Apparatus, system and method for cleaning air |
CN111420313A (zh) * | 2020-05-15 | 2020-07-17 | 上海孚邦实业有限公司 | 一种闭路式呼吸器 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1695812U (de) * | 1952-07-23 | 1955-03-31 | Draegerwerk Ag | Sauerstoffatemschutzgeraet. |
FR1378659A (fr) * | 1963-12-31 | 1964-11-13 | Appareil respiratoire avec écoulement de l'air en circuit fermé | |
GB1057155A (en) * | 1964-06-27 | 1967-02-01 | Siebe Gorman & Co Ltd | Improvements in closed circuit breathing apparatus |
DE1957176U (de) * | 1965-07-14 | 1967-03-16 | Draegerwerk Ag | Atemschutzgeraet. |
DE1683508A1 (de) * | 1967-03-14 | 1971-02-11 | Sodialox Sa | Rahmen fuer Fenster,Tueren od. dgl. |
-
1984
- 1984-11-13 GB GB848428689A patent/GB8428689D0/en active Pending
-
1985
- 1985-11-05 ZA ZA858507A patent/ZA858507B/xx unknown
- 1985-11-12 EP EP85308211A patent/EP0182581A3/fr not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1695812U (de) * | 1952-07-23 | 1955-03-31 | Draegerwerk Ag | Sauerstoffatemschutzgeraet. |
FR1378659A (fr) * | 1963-12-31 | 1964-11-13 | Appareil respiratoire avec écoulement de l'air en circuit fermé | |
GB1057155A (en) * | 1964-06-27 | 1967-02-01 | Siebe Gorman & Co Ltd | Improvements in closed circuit breathing apparatus |
DE1957176U (de) * | 1965-07-14 | 1967-03-16 | Draegerwerk Ag | Atemschutzgeraet. |
DE1683508A1 (de) * | 1967-03-14 | 1971-02-11 | Sodialox Sa | Rahmen fuer Fenster,Tueren od. dgl. |
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2213387A (en) * | 1987-12-08 | 1989-08-16 | Sabre Safety Ltd | Closed circuit breathing apparatus |
EP0372859A2 (fr) * | 1988-12-01 | 1990-06-13 | Avstar Aerospace Corporation | Système respiratoire |
EP0372859A3 (fr) * | 1988-12-01 | 1992-03-11 | Avstar Aerospace Corporation | Système respiratoire |
US5794616A (en) * | 1993-11-17 | 1998-08-18 | Cochran Consulting, Inc. | Use of multiple gas blends with a dive computer |
US5899204A (en) * | 1993-11-17 | 1999-05-04 | Cochran Consulting, Inc. | Dive computer with wrist activation |
WO1995031367A1 (fr) * | 1994-05-14 | 1995-11-23 | Prism Life Support Systems Limited | Appareil respiratoire |
US6003513A (en) * | 1996-01-12 | 1999-12-21 | Cochran Consulting | Rebreather having counterlung and a stepper-motor controlled variable flow rate valve |
FR2750869A1 (fr) * | 1996-07-11 | 1998-01-16 | Commeinhes Remco | Appareil respiratoire a fonctionnement en circuit ferme |
EP0818217A1 (fr) * | 1996-07-11 | 1998-01-14 | Commeinhes Remco | Appareil respiratoire à fonctionnement en circuit fermé |
GB2458854B (en) * | 2007-03-09 | 2012-01-04 | Strata Products Worldwide Llc | Apparatus, system and method for cleaning air |
GB2482454A (en) * | 2007-03-09 | 2012-02-01 | Strata Products Worldwide Llc | Soda lime cartridge for a carbon dioxide scrubber |
GB2482454B (en) * | 2007-03-09 | 2012-05-16 | Strata Products Worldwide Llc | Apparatus, system and method for cleaning air |
US8506681B2 (en) | 2007-03-09 | 2013-08-13 | Strata Products Worldwide, Llc | Apparatus, system and method for cleaning air |
US9162176B2 (en) | 2007-03-09 | 2015-10-20 | Strata Products Worldwide, Llc | Apparatus and method for affecting air |
CN111420313A (zh) * | 2020-05-15 | 2020-07-17 | 上海孚邦实业有限公司 | 一种闭路式呼吸器 |
Also Published As
Publication number | Publication date |
---|---|
ZA858507B (en) | 1986-06-25 |
EP0182581A3 (fr) | 1989-02-22 |
GB8428689D0 (en) | 1984-12-19 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): DE FR GB SE |
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PUAL | Search report despatched |
Free format text: ORIGINAL CODE: 0009013 |
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AK | Designated contracting states |
Kind code of ref document: A3 Designated state(s): DE FR GB SE |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 19890823 |
|
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: RICHARDS, BRIAN JOHN |