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WO2006036113A1 - Manometre pour equipements respiratoires, equipements respiratoires, et methode d'indication de pression pour equipements respiratoires - Google Patents

Manometre pour equipements respiratoires, equipements respiratoires, et methode d'indication de pression pour equipements respiratoires Download PDF

Info

Publication number
WO2006036113A1
WO2006036113A1 PCT/SE2005/001398 SE2005001398W WO2006036113A1 WO 2006036113 A1 WO2006036113 A1 WO 2006036113A1 SE 2005001398 W SE2005001398 W SE 2005001398W WO 2006036113 A1 WO2006036113 A1 WO 2006036113A1
Authority
WO
WIPO (PCT)
Prior art keywords
pressure
indicator
indicator unit
breathing
primary
Prior art date
Application number
PCT/SE2005/001398
Other languages
English (en)
Inventor
Pierre Bühlmann
Original Assignee
Interspiro Ab
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Interspiro Ab filed Critical Interspiro Ab
Publication of WO2006036113A1 publication Critical patent/WO2006036113A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63C—LAUNCHING, HAULING-OUT, OR DRY-DOCKING OF VESSELS; LIFE-SAVING IN WATER; EQUIPMENT FOR DWELLING OR WORKING UNDER WATER; MEANS FOR SALVAGING OR SEARCHING FOR UNDERWATER OBJECTS
    • B63C11/00—Equipment for dwelling or working underwater; Means for searching for underwater objects
    • B63C11/02—Divers' equipment
    • B63C11/18—Air supply
    • 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
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B18/00—Breathing masks or helmets, e.g. affording protection against chemical agents or for use at high altitudes or incorporating a pump or compressor for reducing the inhalation effort
    • A62B18/08—Component parts for gas-masks or gas-helmets, e.g. windows, straps, speech transmitters, signal-devices
    • A62B18/10—Valves
    • 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
    • A62B9/006—Indicators or warning devices, e.g. of low pressure, contamination
    • 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
    • A62B9/022—Breathing demand regulators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63C—LAUNCHING, HAULING-OUT, OR DRY-DOCKING OF VESSELS; LIFE-SAVING IN WATER; EQUIPMENT FOR DWELLING OR WORKING UNDER WATER; MEANS FOR SALVAGING OR SEARCHING FOR UNDERWATER OBJECTS
    • B63C11/00—Equipment for dwelling or working underwater; Means for searching for underwater objects
    • B63C11/02—Divers' equipment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63C—LAUNCHING, HAULING-OUT, OR DRY-DOCKING OF VESSELS; LIFE-SAVING IN WATER; EQUIPMENT FOR DWELLING OR WORKING UNDER WATER; MEANS FOR SALVAGING OR SEARCHING FOR UNDERWATER OBJECTS
    • B63C11/00—Equipment for dwelling or working underwater; Means for searching for underwater objects
    • B63C11/02—Divers' equipment
    • B63C11/12—Diving masks
    • B63C2011/121—Diving masks comprising integrated optical signalling means or displays for data or images
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63C—LAUNCHING, HAULING-OUT, OR DRY-DOCKING OF VESSELS; LIFE-SAVING IN WATER; EQUIPMENT FOR DWELLING OR WORKING UNDER WATER; MEANS FOR SALVAGING OR SEARCHING FOR UNDERWATER OBJECTS
    • B63C11/00—Equipment for dwelling or working underwater; Means for searching for underwater objects
    • B63C11/02—Divers' equipment
    • B63C11/18—Air supply
    • B63C2011/188—Air supply comprising warning means for breathing gas run-out

Definitions

  • the present invention relates in general terms to breathing apparatuses.
  • the present invention especially relates to pressure indication in such breathing apparatuses .
  • a breathing apparatus which is used by a diver or a fireman, for example, is fully functional and free from faults before a non-breathable atmosphere is entered.
  • Examples of such an atmosphere are water, a smoke-filled environment, and a toxic environment.
  • a normal respiratory gas supply has the form of a gas cylinder which contains respiratory gas, for example at a pressure of 200 or 300 bar when the cylinder is full.
  • the respiratory gas is normally air, even though, under special circumstances, it may be other gas mixtures. Since the gas supply is relatively small, it is important that the supply pressure is sufficiently high to provide the user with an anticipated necessary gas volume.
  • EP 0 956 065 Bl describes a pressure indicator for a breathing apparatus which provides the facility to monitor the pressure in a gas cylinder.
  • This pressure indicator is relatively advanced with a number of functions, which means that a number of fault modes exist and that there is an increased risk of misuse.
  • One object of the present invention is to provide a pressure indicator which minimizes the risk of misuse. Another object of the present invention is to provide a breathing apparatus which minimizes the risk of misuse. A further object of the present invention is to provide a way of minimizing the risk of misuse.
  • One advantage of a pressure indicator and a breathing apparatus and a method according to the present invention is that a fully automatic pressure indication is obtainable with a very user-friendly indicator which minimizes misuse of the pressure indicator.
  • a further advantage of a pressure indicator and a breathing apparatus and a method according to the present invention is that, automatically, no current is consumed in the passive state, which helps to minimize misuse and offers the potential for much improved user- friendliness.
  • fig. 1 shows in diagrammatic representation a breathing apparatus according to the present invention.
  • fig. 2 illustrates parts of a pressure cylinder according to a preferred embodiment of the present invention.
  • fig. 3-7 illustrate how the pressure indicator illustrated in fig. 2 functions with varying pressure.
  • a normal breathing apparatus comprises a gas cylinder 1, having a valve 2, which is connected by a hose to a breathing mask 3.
  • the pressure in the gas cylinder 1, the so-called primary pressure is about 300 bar, for example, when the gas cylinder is full. This pressure falls as the gas is consumed.
  • the so-called respiratory pressure there is a regulator 4 installed between the valve 2 and the breathing mask 3.
  • a desired pressure in the breathing mask is substantially the same as the ambient pressure. Since it may be difficult to design a regulator which works well with such a pressure maintenance, a further regulator 5 is normally employed between the regulator 4 and the breathing mask 3.
  • a pressure indicator 6 is designed to detect and indicate the primary pressure in the breathing apparatus.
  • the pressure indicator can either be connected up to the primary pressure close to the valve 2 or, preferably, close to the regulator 4, upstream of the regulator 4.
  • the pressure indicator comprises an indicator unit, preferably a visual indicator such as a light emitting diode (LED) , which can be fitted onto the breathing mask within the field of vision of the user. In this way, the user can easily perceive when the indicator unit gives warning of too low a pressure.
  • a visual indicator is that if it is placed next to/on the mask glass of the breathing mask, it can also be read by another person close to the user, so called “buddy reading".
  • the indicator unit is constituted by a LED, it is preferably powered by a battery.
  • the pressure indicator ⁇ further comprises a pressure sensor, which is designed to detect pressure in a range above a predetermined base level. If the regulator 4 is designed to maintain a predetermined pressure, for example about 7 bar above the ambient pressure, then the regulator 4 will only function satisfactorily as long as the primary pressure is higher than the predetermined pressure, in this case about 7 bar.
  • an extra warning is therefore given from the indicator unit whenever the primary pressure is dangerously close to, in this case, about 7 bar. With a small safety margin to this, the extra warning can be given at a primary pressure of about 10 bar. In normal use, a warning at a primary pressure of about 55 bar is preferred.
  • a suitable pressure range for the pressure sensor is preferably, therefore, about 10-55 bar.
  • the pressure sensor comprises a body 7, a pin 8 and a spring 9.
  • the body 7 comprises a rotationally symmetric part 10 of generally T-shaped axial section.
  • the part 10 is disposed in a part 11, fitting tight around the part 10, of a coupling unit to the primary pressure.
  • a seal 15 is fitted.
  • the part 10 is exposed to the primary pressure, which forces the body 7 to the right in fig. 2, and which primary pressure is countered by the spring 9. This causes the body 7 to move left-right in fig. 2 with changing primary pressure. Without any primary pressure, the body 7 will be positioned as shown in fig. 3, and at full primary pressure, for example 300 bar, the body will be positioned as shown in fig. 5.
  • the pin 8 is preferably also spring-loaded, so that it can cooperate with the body 7 and be moved up-down in fig. 2.
  • the body 7 has a r ⁇ tationally symmetric part having a waist portion.
  • the waist portion represents an activation zone 12 between a first deactivation zone 13 and a second deactivation zone 14.
  • the pin 8 At pressure below about 10 bar, such as when the pressure indicator 6 is not connected to the primary pressure, the pin 8 is positioned at the first deactivation zone 13, as illustrated in fig. 3. In this position, the LED does not receive any current.
  • the pressure indicator 6 is connected to a primary pressure, preferably by opening of the valve 2 after the coupling unit to the primary pressure has been fixed to the regulator 4, the body 7 will move rapidly to the right, see fig. 3-5.
  • the pin 8 will be in the activation zone 12, see fig. 4, and the LED will then be briefly lit. After this, the pin 8 will be in the second deactivation zone 14, as illustrated in fig. 5. The LED is once again devoid of current and will therefore go out. The moment in which the pin 8 is in the activation zone 12 is so short that the LED only appears to have blinked once. This can be used to check that the pressure indicator is functioning when primary pressure is connected to the breathing mask prior to the apparatus being used.
  • the LED is relit.
  • the LED is advantageously designed to blink instead of being constantly lit. Moreover, it is easier to detect a blinking lamp than a constantly lit lamp.
  • the LED continues to blink until the primary pressure goes below, in this example, about 10 bar, when the pin returns to the first deactivation zone 13, which is illustrated in fig. 7.
  • the LED now goes out, it is an extra warning which clearly denotes to the user that the respiratory gas is about to run out.
  • a major handling advantage of a pressure indicator according to the present invention is that, since current is only consumed, in the above example, within the range 10-55 bar, no external circuit breakers are required for the system. With a long-life battery and normal use, very long service intervals will able to be obtained. This means, moreover, that the pressure indicator can be more easily encapsulated, since no external circuit breaker is required and since the battery can be molded into the pressure indicator as the battery does not need to be able to be replaced for a very long time.
  • the pressure indicator is connected to the primary pressure, in this example about 300 bar.
  • the valve on the gas cylinder is shut when the manometer shows about 300 bar.
  • a bypass valve is used to release the gas mixture, so that the pressure falls in the gas line.
  • the indicator unit should start to blink.
  • the manometer shows about 10 bar, the indicator unit should stop blinking. In this way, a complete check of the pressure indicator has been able to be conducted.

Landscapes

  • Health & Medical Sciences (AREA)
  • Pulmonology (AREA)
  • General Health & Medical Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Emergency Medicine (AREA)
  • Measuring Fluid Pressure (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)

Abstract

L'invention porte également sur un manomètre et sur une méthode d'indication de pression selon laquelle un capteur de pression de l'invention actionne un indicateur de pression uniquement à intervalles de pression donnés par rapport à une pression de base prédéterminée. On obtient ainsi facilement une indication de pression en trois parties, et, automatiquement, une consommation nulle de courant à l'état passif.
PCT/SE2005/001398 2004-09-28 2005-09-22 Manometre pour equipements respiratoires, equipements respiratoires, et methode d'indication de pression pour equipements respiratoires WO2006036113A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0402339A SE528461C2 (sv) 2004-09-28 2004-09-28 Tryckindikator för andningsutrustning, andningsutrustning och metod för tryckindikering vid andningsutrustning
SE0402339-6 2004-09-28

Publications (1)

Publication Number Publication Date
WO2006036113A1 true WO2006036113A1 (fr) 2006-04-06

Family

ID=33414840

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE2005/001398 WO2006036113A1 (fr) 2004-09-28 2005-09-22 Manometre pour equipements respiratoires, equipements respiratoires, et methode d'indication de pression pour equipements respiratoires

Country Status (2)

Country Link
SE (1) SE528461C2 (fr)
WO (1) WO2006036113A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996003174A1 (fr) * 1994-07-28 1996-02-08 Comasec International S.A. Verification du fonctionnement d'un appareil d'assistance respiratoire
WO1997030756A1 (fr) * 1996-02-20 1997-08-28 Interspiro Ab Procede et systeme de controle de l'aptitude au fonctionnement d'un equipement respiratoire
FR2804208A1 (fr) * 2000-01-25 2001-07-27 Tfe Tech Et Fabrications Elect Transmetteur vocal de pression de gaz respiratoire et de profondeur d'immersion

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996003174A1 (fr) * 1994-07-28 1996-02-08 Comasec International S.A. Verification du fonctionnement d'un appareil d'assistance respiratoire
WO1997030756A1 (fr) * 1996-02-20 1997-08-28 Interspiro Ab Procede et systeme de controle de l'aptitude au fonctionnement d'un equipement respiratoire
FR2804208A1 (fr) * 2000-01-25 2001-07-27 Tfe Tech Et Fabrications Elect Transmetteur vocal de pression de gaz respiratoire et de profondeur d'immersion

Also Published As

Publication number Publication date
SE0402339L (sv) 2006-03-29
SE528461C2 (sv) 2006-11-14
SE0402339D0 (sv) 2004-09-28

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