EP0111754B1 - Atemschutzmaske mit Überdruck im Maskeninnenraum - Google Patents

Atemschutzmaske mit Überdruck im Maskeninnenraum Download PDF

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Publication number
EP0111754B1
EP0111754B1 EP83111402A EP83111402A EP0111754B1 EP 0111754 B1 EP0111754 B1 EP 0111754B1 EP 83111402 A EP83111402 A EP 83111402A EP 83111402 A EP83111402 A EP 83111402A EP 0111754 B1 EP0111754 B1 EP 0111754B1
Authority
EP
European Patent Office
Prior art keywords
blocking
mask
excess pressure
control membrane
lever
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
Application number
EP83111402A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0111754A1 (de
Inventor
Hans-Joachim Ing.Grad. Walther
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Draegerwerk AG and Co KGaA
Original Assignee
Draegerwerk AG and Co KGaA
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 Draegerwerk AG and Co KGaA filed Critical Draegerwerk AG and Co KGaA
Publication of EP0111754A1 publication Critical patent/EP0111754A1/de
Application granted granted Critical
Publication of EP0111754B1 publication Critical patent/EP0111754B1/de
Expired legal-status Critical Current

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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
    • A62B9/022—Breathing demand regulators
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S137/00—Fluid handling
    • Y10S137/908—Respirator control
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7781—With separate connected fluid reactor surface
    • Y10T137/7782—With manual or external control for line valve

Definitions

  • the invention relates to a breathing mask with excess pressure in the interior of the mask, in accordance with the first part of patent claim 1.
  • a known respirator mask is equipped with a lung-controlled valve, with which excess pressure is generated and maintained in the interior of the mask.
  • the valve comprises, in a valve housing between a breathing chamber opening out in front of the user's respiratory organs and an outer chamber connected to the external atmosphere, a pressure chamber connected to both chambers via a valve.
  • a pressure chamber connected to both chambers via a valve.
  • a wall part of the pressure chamber is movably connected to the inner wall of the valve housing via a control membrane.
  • an inlet valve of the respiratory mask for respiratory gas is actuated via the respiratory pressure movement of the pressure chamber.
  • a switchable blocking device enables the breathing gas supply to be interrupted when the mask is removed.
  • the locking device consists of a shaft rotatably mounted in the breathing chamber. One end is guided in an airtight guide bushing through the wall of the breathing chamber to the outside and there is provided with a radial actuating lever. At this the shaft can be swiveled between two end positions. In one end position, the locked position, a resilient tongue of the actuating lever engages in a recess in the wall of the breathing chamber.
  • the shaft has a wire bracket inside. The wire bracket touches the lever arm of the inlet valve in the locked position and brings it into the closed position.
  • a leg spring pushes the wire bracket, which can be pivoted with the shaft, into the other end position, the release position, in which it rests against the inner wall of the breathing chamber and allows the lever arm to move freely.
  • the actuating lever to be actuated has been locked into the locked position, thereby interrupting the breathing gas supply.
  • the first breath is activated automatically.
  • a force must be generated by the suction of inhalation acting on the membrane on the lever arm, which is sufficient to force the locking device out of the locking position.
  • the leg spring then brings the locking device into the release position (DE-A-30 38 100).
  • a known lung-controlled compressed air breathing apparatus with overpressure in the respiratory mask contains in its lung-controlled valve a control membrane and a metering valve that can be opened from the pre-pressure.
  • the control membrane from which the ambient air acts, limits the inside of a control room that is under the internal pressure of the respirator.
  • the control membrane is connected to the metering valve via a rocker arm and closes it against the force of the incoming compressed air as soon as a certain overpressure is reached in the control chamber.
  • a spacer is movable longitudinally and tightly outwards from the control chamber through its wall opposite the control membrane. It ends in the control room in a stop plate which is loaded by a compression spring in the direction of the control membrane.
  • an eccentric switch lever is rotatably attached, which is supported against the wall of the control room.
  • the stop plate lies against the rocker arm.
  • the force of the compression spring then closes the metering valve even when the respirator mask is removed and there is no excess pressure in the control room.
  • the release position the stop plate is held at a distance from the rocker arm and the full movement of the control membrane is released.
  • the transition to the release position takes place automatically when the control membrane with the rocker arm moves the spacer bolt outwards against the spring force under the first breath.
  • the ent Loaded switch lever is oriented to gravity in such a way that it then tilts into the release position under the weight of its grip part. Switching to the locked position must be done manually (DE-A-26 20 170).
  • Another compressed gas breathing apparatus with an overpressure in the breathing mask is known, in which the breathing mask is connected via a lung-controlled valve via a line to the outlet of a pressure reducer and is supplied with breathing gas from there.
  • a control membrane is acted upon on its outer side by the ambient pressure and a spring.
  • the inner side is burdened by the pressure inside the mask.
  • One arm of a pivotally held rocker arm bears against this side, while the other arm is connected to the closing element of the valve, a closing piston.
  • the closing piston contains a transverse opening, with which it connects the respiratory gas line to the inside of the respirator mask or closes the line in the appropriate position.
  • This well-known compressed gas breathing apparatus with overpressure in the breathing mask is suitable for normal requirements. Too large suddenly required amounts of breathing gas and also dynamic loads due to e.g. B. Running and jumping cause the locking piston to jerky movements and thus to uncontrolled breathing gas conditions in the mask interior.
  • the object of the invention is to find a lung-controlled valve for respirators that are used together with compressed gas respirators and in which an excess pressure must be maintained, the spontaneously changing loads on the wearer, for. B. suddenly occurring heavy work, ensures the necessary higher breathing air requirement and with which the breathing gas is prevented when the respiratory gas supply container valve is not open, but the respirator can still be ventilated immediately after putting on the respiratory mask.
  • the lung-controlled valve has a valve housing 1 with a breathing gas connector 3 for the supply and an outlet connector 4 for the breathing mask and is closed with a cover 2.
  • the valve housing 1 is separated from the cover 2 by a control membrane 5, forming an outer chamber 24 above the cover 2 and a respiratory chamber 6 below, the pressure of which corresponds to the internal pressure of the respirator.
  • the breathing gas nozzle 3 is separated from the breathing chamber 6 by a lung-controlled inlet valve 7, 8 for the breathing gas, consisting of valve seat 7 and valve body 8.
  • the valve body 8 is biased in the closing direction by a closing spring 9 and is in contact with the control membrane 5 via an actuating device.
  • the control lever 11 is mounted in the valve housing 1 and bears against the control membrane 5 with its longer lever arm.
  • the control membrane 5 has a cup-shaped holding collar 12 on the outside.
  • the longer lever of a one-armed overpressure lever 13 bears here. This is mounted in the cover 2 and is biased against the control diaphragm 5 by a semi-circular spring 14 via its shorter lever.
  • the pressure lever 13 opposite the spring 14 is held in a bearing 15 in the cover 2.
  • the overpressure lever 13 has a locking cam 16.
  • the pushing end 23 of a longitudinally movable locking slide 17, which ends at the other end in a locking lug 18, is present in the cover 2.
  • the locking slide 17 can be moved via a handle 19 which is guided through a slot 20 to the outside.
  • An escapement spring 21 ensures speedy gear.
  • the cover 2 On both sides of the locking lug 18 of the locking slide 17, the cover 2 carries a system 22 outside the retaining collar 12.

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)
EP83111402A 1982-12-10 1983-11-15 Atemschutzmaske mit Überdruck im Maskeninnenraum Expired EP0111754B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3245717A DE3245717C1 (de) 1982-12-10 1982-12-10 Lungengesteuertes Ventil fuer den UEberdruckbetrieb im Maskeninnenraum
DE3245717 1982-12-10

Publications (2)

Publication Number Publication Date
EP0111754A1 EP0111754A1 (de) 1984-06-27
EP0111754B1 true EP0111754B1 (de) 1987-05-06

Family

ID=6180305

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83111402A Expired EP0111754B1 (de) 1982-12-10 1983-11-15 Atemschutzmaske mit Überdruck im Maskeninnenraum

Country Status (4)

Country Link
US (1) US4572176A (enrdf_load_stackoverflow)
EP (1) EP0111754B1 (enrdf_load_stackoverflow)
JP (1) JPS59115055A (enrdf_load_stackoverflow)
DE (1) DE3245717C1 (enrdf_load_stackoverflow)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3401383A1 (de) * 1984-01-17 1985-07-25 Drägerwerk AG, 2400 Lübeck Atemschutzmaske mit ueberdruck im maskeninnenraum
US4683881A (en) * 1985-10-30 1987-08-04 U.S.D. Corp. Breathing regulator mouthpiece
DE3539668A1 (de) * 1985-11-08 1987-05-21 Draegerwerk Ag Lungengesteuertes membranventil fuer atemschutzmasken
DE3840058A1 (de) * 1988-11-28 1990-05-31 Auergesellschaft Gmbh Lungengesteuertes ventil
FR2644750A1 (fr) * 1989-03-21 1990-09-28 Spirotech Ind Commerc Dispositif d'alimentation en gaz respiratoire pour plongeur
US5279081A (en) * 1990-02-16 1994-01-18 Space Biospheres Ventures Pressure balancing a closed ecological system
JPH06191481A (ja) * 1992-12-22 1994-07-12 Zexel Corp 半閉鎖式呼吸装置のマウスピース
GB9301959D0 (en) * 1993-02-01 1993-03-17 Sabre Safety Ltd A valve for use in breathing apparatus
GB2315116B (en) * 1993-09-22 1998-03-25 Racal Health & Safety Ltd Valves
GB9319580D0 (en) * 1993-09-22 1993-11-10 Racal Health & Safety Ltd Valves
US5551474A (en) * 1995-06-20 1996-09-03 Chuang; Rung-Chao Gas flow direct pressure regulator
GB9619459D0 (en) * 1996-09-18 1996-10-30 Jackson Peter J Breathing apparatus
FR2781381B1 (fr) * 1998-07-24 2000-09-29 Intertechnique Sa Regulateur a la demande pour systeme respiratoire
ITGE20010028A1 (it) * 2001-03-23 2002-09-23 Htm Sport Spa Erogatore per apparecchi respiratori subacquei.
DE102004052173B3 (de) * 2004-10-27 2006-01-12 Dräger Safety AG & Co. KGaA Atemschutzmaske für Normaldruck- und Überdruckbetrieb
GB0509369D0 (en) * 2005-05-07 2005-06-15 Foss Nicholas J A breathing apparatus demand valve
JP5528899B2 (ja) * 2010-04-28 2014-06-25 興研株式会社 供給弁
US9278235B1 (en) * 2012-03-12 2016-03-08 Lynn H. Phillips Adaptive demand oxygen delivery system
WO2017116999A1 (en) 2015-12-30 2017-07-06 Scott Technologies, Inc. Respirator mask with air-saver switch
EP4389233A1 (en) * 2022-12-22 2024-06-26 Dräger Safety AG & Co. KGaA Lung demand regulator

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2620170A1 (de) * 1976-05-07 1977-11-17 Draegerwerk Ag Lungengesteuertes pressluftatemgeraet mit ueberdruck in der atemschutzmaske

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US986344A (en) * 1910-07-14 1911-03-07 Reliance Engineering & Mfg Company Of Chicago Automatic gas-regulator.
US1824072A (en) * 1930-09-22 1931-09-22 Chipley D Bullard Automatic safety valve
US2406888A (en) * 1944-06-06 1946-09-03 Scott Aviation Corp Breathing apparatus
US3285261A (en) * 1962-12-21 1966-11-15 Robertshaw Controls Co Breathing demand regulator
US3180356A (en) * 1963-01-07 1965-04-27 American Radiator & Standard Combination pressure regulator and shut-off valve
AU535351B2 (en) * 1979-06-21 1984-03-15 Minnesota Mining And Manufacturing Company Controlled diaphragm valve
SE428760B (sv) * 1979-10-09 1983-07-25 Aga Ab Andningsmask

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2620170A1 (de) * 1976-05-07 1977-11-17 Draegerwerk Ag Lungengesteuertes pressluftatemgeraet mit ueberdruck in der atemschutzmaske

Also Published As

Publication number Publication date
US4572176A (en) 1986-02-25
JPH0150419B2 (enrdf_load_stackoverflow) 1989-10-30
EP0111754A1 (de) 1984-06-27
DE3245717C1 (de) 1984-06-07
JPS59115055A (ja) 1984-07-03

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