US3724482A - Breathing valve - Google Patents

Breathing valve Download PDF

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Publication number
US3724482A
US3724482A US00121354A US3724482DA US3724482A US 3724482 A US3724482 A US 3724482A US 00121354 A US00121354 A US 00121354A US 3724482D A US3724482D A US 3724482DA US 3724482 A US3724482 A US 3724482A
Authority
US
United States
Prior art keywords
overpressure
inlet
valve
diaphragm
chamber
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 - Lifetime
Application number
US00121354A
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English (en)
Inventor
S Ekstrom
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.)
Interspiro AB
Original Assignee
AGA 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 AGA AB filed Critical AGA AB
Application granted granted Critical
Publication of US3724482A publication Critical patent/US3724482A/en
Assigned to INTERSPIRO AB A SWISS CORP reassignment INTERSPIRO AB A SWISS CORP ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: AGA AKTIEBOLAG
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B63C11/22—Air supply carried by diver
    • B63C11/2227—Second-stage regulators
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K15/00—Check valves
    • F16K15/14—Check valves with flexible valve members
    • F16K15/144—Check valves with flexible valve members the closure elements being fixed along all or a part of their periphery
    • 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

Definitions

  • ABSTRACT A breathing valve having a housing comprising an [21] A 121354 inlet chamber in communication with which is an inlet 7 opening controlled by an inlet valve, a passage to the [30] Foreign Application Priority Data breathing organs of the user and an exhalation valve.
  • a control diaphragm subject on one side to the pres- Mar. 5, 1970 Sweden ..2892/70 sure in the inlet chamber acts through an intermediate member to control the inlet valve.
  • an overpressure is not necessary and, in fact, is undesirable. If the same equipment is to be usable both for diving under water and for breathing in a noxious atmosphere, the overpressure should be removable.
  • a breathing valve suitable for breathing in an extremely noxious atmosphere is obtained by providing the valve with overpressure diaphragm which, together with a control diaphragm forms an overpressure chamber in the housing of the valve for achieving an overpressure in the inlet chamber leading to the breathing organs of the user during both the inhalation phase and the exhalation phase.
  • the regulated pressure in the overpressure chamber can be varied and even removed entirely by a simple manual adjustment. Consequently, the breathing valve is suitable for use in an environment of noxious gases or for diving under water.
  • an inlet chamber which communicates with an inlet opening and with the passage to the user is bordered at one portion by a control diaphragm, movement of which operates a lever to control aninlet valve.
  • the exhalation valve from the inlet chamber may be provided in the control diaphragm; and this has the advantage that it eliminates a hydrostatic pressure difference between the control diaphragm and the exhalation valve, as a result of which the operation of the breathing valve becomes independent of the position of the valve in the water and there is no risk of blowing out air from the valve or that breathing through the valve should become cumbersome.
  • an overpressure diaphragm opposes the control diaphragm forming therebetween an overpressure chamber, a build-up of pressure in which moves the control diaphragm to cause the inlet valve to open.
  • Springs act on the overpressure diaphragm urging it toward the control diaphragm, and hence toward the inlet valve open position. These springs act on their other end against a removable, adjustable lid. Consequently, the springs are easily removable for the purpose of removing the overpressure chamber, thereby adopting the breathing valve for use in diving under water.
  • the breathing valve comprises a housing 10 having an inlet chamber 11. In communication with this inlet chamber 11 is an inlet tube 12, the opening of which is controlled by an inletvalve 13. An opening 14 leads from this inlet chamber to the breathing organs of the user.
  • the inlet chamber is also bounded in part by a control diaphragm 15 in which are formed a plurality of openings 16. These openings 16 are covered by an exhalation valve 17 which is held firmly against the. diaphragm 15 to close theopening 16 except when it is resiliently biased away from the opening 16 during exhalation.
  • an overpressure diaphragm 20 including as a part thereof a central stud 21 which extends down to the exhalation valve 17 and holds the same against the control diaphragm 15.
  • An overpressure chamber is formed between the diaphragms 15 and 20.
  • the diaphragm 20 is held in place by the force of two springs 26 and 27.
  • Spring 26 acts at its lower end against the other circumference of the diaphragm 20 while the spring 27 acts against the central stud 21.
  • both springs abut a lid 23 having outlet openings 24 formed therein. This lid is vertically adjustable relative to the housing 10, for example by means of a threaded engagement 28 between the lid 23 and the housing 10.
  • a lever 30 pivotally connected at 31 and connected at its righthand end by means of connection 32 to the inlet valve 13. Downward movement at the left-hand end of the lever 30 opens the inlet valve 13. In the absence of such downward movement, the spring 33 normally holds the inlet valve closed.
  • an overpressure is produced in the inlet chamber 11 of the breathing valve when the lid 23 is adjusted vertically to a position in which the two springs 26 and 27, which function independently of each other, are compressed against the diaphragm 20.
  • the control spring 27 loads the lever 30 through the central stud 21 and the control diaphragm causing the inlet valve 13 to open so that a flow of gas is created into the inlet chamber. A portion of this inflowing gas flows through the exhalation valve 17 so that the pressure in the overpressure chamber 22 reaches the same value as the pressure in the inlet chamber 11.
  • the pressure increases until a balance is obtained between the outwardly directed forces on the overpressure diaphragm (equal to the pressure multiplied with the effective area of the diaphragm 20) and the force from the control spring 27 acting in the reverse direction.
  • the inlet valve 13 then closes when a balance has been achieved since the lever 30 in this position is not influenced by any downward force at its left end, and hence the spring 33 is free to close the valve.
  • the other spring 26 loads the outer circumference of the diaphragm 20 so that the overpressure caused by the control spring 27 does not cause any leakage.
  • the lid 23 is taken off and the two springs 26 and 27 and the overpressure diaphragm 20 are removed.
  • a suitable means would be provided to hold the exhalation valve 17 against the diaphragm 15 to cover the openings 16.
  • a breathing valve comprising: a housing having an inlet, an outlet and an opening adapted to be connected to lead to a user, an inlet chamber, an inlet valve controlling the flow of gasv from the inlet to the inlet chamber, the said inlet and the said opening both being in fluid connection with the inlet chamber, a control diaphragm, one side of which is subjected to gas pressure in the inlet chamber, a control means including a lever operatively connecting said control diaphragm and the inlet valve such that movement of the control diaphragm actuates the inlet valve, an overpressure diaphragm spaced from the control diaphragm and forming with it an overpressure chamber, a first outlet valve connecting the inlet chamber and the overpressure chamber and opening in a direction toward the overpressure chamber, means including a stud connected with the central part of the overpressure diaphragm and extending against the control diaphragm, a control spring acting on the overpressure diaphragm holding said stud against the control dia
  • the adjustable member comprises a lid having openings therein.
  • control diaphragm includes openings which are closed by the said first outlet valve.

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)
  • Respiratory Apparatuses And Protective Means (AREA)
US00121354A 1970-03-05 1971-03-05 Breathing valve Expired - Lifetime US3724482A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE02892/70A SE335826B (sv) 1970-03-05 1970-03-05

Publications (1)

Publication Number Publication Date
US3724482A true US3724482A (en) 1973-04-03

Family

ID=20260941

Family Applications (1)

Application Number Title Priority Date Filing Date
US00121354A Expired - Lifetime US3724482A (en) 1970-03-05 1971-03-05 Breathing valve

Country Status (6)

Country Link
US (1) US3724482A (sv)
JP (1) JPS5528702B1 (sv)
DE (1) DE2110206C3 (sv)
FR (1) FR2084270A5 (sv)
GB (1) GB1344101A (sv)
SE (1) SE335826B (sv)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4172467A (en) * 1976-10-09 1979-10-30 Dragerwerk Aktiengesellschaft Respirator valve for respirators
US4269216A (en) * 1978-07-19 1981-05-26 A-T-O Inc. Pressure demand valve system
US4345592A (en) * 1980-09-10 1982-08-24 A-T-O Inc. Pressure demand regulator with automatic shut-off
US4345593A (en) * 1978-07-19 1982-08-24 A-T-O Inc. Pressure-demand breathing apparatus with automatic air shut-off
US4378011A (en) * 1980-04-24 1983-03-29 Dragerwerk Aktiengesellschaft Lung controlled pressure gas respirator for use with an oxygen mask and valving mechanism therefor
US4608976A (en) * 1982-02-16 1986-09-02 Canocean Resources, Ltd. Breathing protective apparatus with inhalation and exhalation regulator
GB2192794A (en) * 1986-07-23 1988-01-27 Helmets Ltd Improvements in gaseous fluid flow valves
US20060124130A1 (en) * 2003-12-26 2006-06-15 Jorge Bonassa Ventilation system for respiratory devices
CN107096142A (zh) * 2017-06-22 2017-08-29 东台市江海救生消防设备有限公司 正压式空气呼吸器

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE428760B (sv) * 1979-10-09 1983-07-25 Aga Ab Andningsmask
SE428759B (sv) * 1979-10-09 1983-07-25 Aga Ab Andningsmask
NL9400102A (nl) * 1994-01-21 1995-09-01 Pim De Bruijn Ademluchttoevoerstelsel.
DE19731068A1 (de) * 1997-07-19 1999-01-21 Joerg Rittmeister Verbessertes Ausatemventil für Lungenautomaten und Schnorchel

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3138154A (en) * 1960-05-13 1964-06-23 Gasaccumulator Svenska Ab Breathing device
US3149631A (en) * 1960-02-18 1964-09-22 Gasaccumulator Svenska Ab Arrangement in breathing apparatus
US3460559A (en) * 1968-08-26 1969-08-12 Bendix Corp Combined pressure regulator and relief valve
US3608574A (en) * 1967-12-19 1971-09-28 Intertechnique Sa Diaphragm-valve especially for a respiratory-gas supply system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3149631A (en) * 1960-02-18 1964-09-22 Gasaccumulator Svenska Ab Arrangement in breathing apparatus
US3138154A (en) * 1960-05-13 1964-06-23 Gasaccumulator Svenska Ab Breathing device
US3608574A (en) * 1967-12-19 1971-09-28 Intertechnique Sa Diaphragm-valve especially for a respiratory-gas supply system
US3460559A (en) * 1968-08-26 1969-08-12 Bendix Corp Combined pressure regulator and relief valve

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4172467A (en) * 1976-10-09 1979-10-30 Dragerwerk Aktiengesellschaft Respirator valve for respirators
US4269216A (en) * 1978-07-19 1981-05-26 A-T-O Inc. Pressure demand valve system
US4345593A (en) * 1978-07-19 1982-08-24 A-T-O Inc. Pressure-demand breathing apparatus with automatic air shut-off
US4378011A (en) * 1980-04-24 1983-03-29 Dragerwerk Aktiengesellschaft Lung controlled pressure gas respirator for use with an oxygen mask and valving mechanism therefor
US4345592A (en) * 1980-09-10 1982-08-24 A-T-O Inc. Pressure demand regulator with automatic shut-off
US4608976A (en) * 1982-02-16 1986-09-02 Canocean Resources, Ltd. Breathing protective apparatus with inhalation and exhalation regulator
GB2192794A (en) * 1986-07-23 1988-01-27 Helmets Ltd Improvements in gaseous fluid flow valves
GB2192794B (en) * 1986-07-23 1990-05-16 Helmets Ltd Improvements in gaseous fluid flow valves
US20060124130A1 (en) * 2003-12-26 2006-06-15 Jorge Bonassa Ventilation system for respiratory devices
CN107096142A (zh) * 2017-06-22 2017-08-29 东台市江海救生消防设备有限公司 正压式空气呼吸器

Also Published As

Publication number Publication date
FR2084270A5 (sv) 1971-12-17
GB1344101A (en) 1974-01-16
DE2110206C3 (de) 1974-06-20
JPS5528702B1 (sv) 1980-07-30
DE2110206A1 (de) 1971-09-16
SE335826B (sv) 1971-06-07
DE2110206B2 (de) 1973-11-08

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Legal Events

Date Code Title Description
AS Assignment

Owner name: INTERSPIRO AB S-181 81 LIDINGO SWEDEN A SWISS CORP

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:AGA AKTIEBOLAG;REEL/FRAME:004167/0673

Effective date: 19830809