US3795257A - Demand valve assembly for use with breathing or resuscitation equipment - Google Patents

Demand valve assembly for use with breathing or resuscitation equipment Download PDF

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Publication number
US3795257A
US3795257A US00238502A US3795257DA US3795257A US 3795257 A US3795257 A US 3795257A US 00238502 A US00238502 A US 00238502A US 3795257D A US3795257D A US 3795257DA US 3795257 A US3795257 A US 3795257A
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United States
Prior art keywords
valve
button
housing
outlet
passage
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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
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US00238502A
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English (en)
Inventor
D Fabish
R Hamilton
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ZEE DEVELOPMENT CORP A CORP OF
Robertshaw Controls Co
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Robertshaw Controls Co
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Publication of US3795257A publication Critical patent/US3795257A/en
Assigned to LIFE SUPPORT PRODUCTS, INC., reassignment LIFE SUPPORT PRODUCTS, INC., ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: ROBERTSHAW CONTROLS COMPANY, 1701 BYRD AVE., RICHMOND, VA. A CORP. OF DEL.
Assigned to ZEE DEVELOPMENT CORP., A CORP. OF CA reassignment ZEE DEVELOPMENT CORP., A CORP. OF CA ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: LIFE SUPPORT PRODUCTS, INC., A CORP. OF CA
Anticipated expiration legal-status Critical
Assigned to BANKERS TRUST COMPANY reassignment BANKERS TRUST COMPANY SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ROBERTSHAW CONTROLS COMPANY A CORP. OF DELAWARE
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • 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
    • F16K15/1402—Check valves with flexible valve members having an integral flexible member cooperating with a plurality of seating surfaces
    • 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. ventilators; Tracheal tubes
    • A61M16/20—Valves specially adapted to medical respiratory devices
    • 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. ventilators; Tracheal tubes
    • A61M16/20—Valves specially adapted to medical respiratory devices
    • A61M16/201—Controlled valves
    • A61M16/202—Controlled valves electrically actuated
    • A61M16/203—Proportional
    • A61M16/204—Proportional used for inhalation control
    • 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. ventilators; Tracheal tubes
    • A61M16/20—Valves specially adapted to medical respiratory devices
    • A61M16/201—Controlled valves
    • A61M16/202—Controlled valves electrically actuated
    • A61M16/203—Proportional
    • A61M16/205—Proportional used for exhalation control
    • 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. ventilators; Tracheal tubes
    • A61M16/20—Valves specially adapted to medical respiratory devices
    • A61M16/201—Controlled valves
    • A61M16/206—Capsule valves, e.g. mushroom, membrane 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. ventilators; Tracheal tubes
    • A61M16/20—Valves specially adapted to medical respiratory devices
    • A61M16/201—Controlled valves
    • A61M16/207—Membrane valves with pneumatic amplification stage, i.e. having master and slave membranes
    • 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. ventilators; Tracheal tubes
    • A61M16/10—Preparation of respiratory gases or vapours
    • A61M16/105—Filters
    • A61M16/106—Filters in a path
    • A61M16/107—Filters in a path in the inspiratory path
    • 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
    • F16K2200/00—Details of valves
    • F16K2200/20—Common housing having a single inlet, a single outlet and multiple valve members
    • F16K2200/202—Common housing having a single inlet, a single outlet and multiple valve members one valve arranged inside of the valve member of a second valve, e.g. nested valve members
    • 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
    • Y10T137/2496—Self-proportioning or correlating systems
    • Y10T137/2544—Supply and exhaust type
    • 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
    • Y10T137/7758—Pilot or servo controlled
    • Y10T137/7762—Fluid pressure type
    • Y10T137/7764—Choked or throttled pressure type
    • Y10T137/7766—Choked passage through main valve head
    • 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
    • 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
    • Y10T137/7837—Direct response valves [i.e., check valve type]
    • Y10T137/7838—Plural
    • Y10T137/7841—One valve carries head and seat for second valve

Definitions

  • ABSTRACT 52 us. C1 137/491, 137/495, 137/102, A demand valve membly with breathing 137/512'2 resuscitation equipment is disclosed.
  • a positive pres- UNITED STATES PATENTS sure button assembly provides for accurate pressure settings with only slight button travel.
  • 3,285,261 11/1966 Chaney 137/491 X r 3,493,010 2/1970 Dreibelbisnn, 137/495 X 16 Claims, 7 Drawing Figures PAIENTED 51974 SHEET 1 [1F 3 DEMAND VALVE ASSEMBLY FOR USE WITH BREATHING OR RESUSCITATION EQUIPMENT BACKGROUND OF THE INVENTION blies may be found in US. Pat. No. 3,285,261 vto Chaney, owned by a common assignee, and US. Pat. No. 3,435,839 to Elder. An assembly combining the devices of the Chaney and Elder patients is also known.
  • the present demand valve assembly has, in a single housing, a first or main valve com-trolling flow of pressurized gas from a source to the assembly, a pilot valve controlling the opening and closing of the main valve and which is responsive to both mechanical actuation and to pressures developed in-theassembly, and an inhalation-exhalationvalve controlling the passageof thepressurized gas to a patient and the venting ofexhausted air to the ambient atmosphere.
  • FIG. 3 is a longitudinal sectional view of the demand valve assembly shown in the exhaust or exhale condition
  • the subject demand valve assembly comprises a housing 10 having a first cavity 12 formed in one end and a second opposing cavity 14 formed in the other end.
  • a first bore 16 and second larger bore 18 are formed in the housing and provide communication between the first and second cavtysl I I
  • the paddle assembly 20 incl'u'desa paddle member 22 one end of which is fixed to the housing by screw 24.
  • a second screw 26 adjustably positions theother end of the paddle member with respect to the surface 28 of the first cavity.
  • Pilot lever 30 is pivotably mountedon the free end of the paddle member 22 by pivot pin 32.
  • a spring 34 biases the pilot lever so that pad 36 normally closes the bore 38 of pilot valve 40 which is fixedly'mounted in the first communicating bore 16.
  • a sensing diaphragm 42 is positioned in the first cavity to define a sensing chamber and has a peripheral enlargement 44 engaging in an annular recess 46 in housinglt).
  • a metal plate 48 is attached to the diaphragm for improving the wear characteristics Where the diaphragm engages the pilot level member.
  • a button assembly '50 closes the first cavity.
  • the button assembly includes a button support ring 52, first button 54, second button 56, retaining ring 58, first coiled spring and second coiled spring-62, the buttons 54 and 56 being coaxially and slidably arranged to permit the button 56 to move within the button 54 to provide an override for the button assembly 50.
  • the re taining ring 58 includes annular flanges 64 and 66 and is snap fastened together with the first button 54.
  • first spring 60 is mounted in-compressionbetwe en buttons 54 and 56 andno rmally biases an annular shoulder of the second button 56 into engagement with flange 64 while the second spring 62 normally biases the first button 54 and retaining ring 58 to bring flange 66 into engagement with annular flange 68 on the button support ring- 52.
  • the button assembly 50 is mounted on the housing by the engagement of an annular flange 70 on the button support ring with a corresponding recess 72 in the housing.
  • An inlet bore 74 provided in the housing 10 and includes a main passage 76 and a-by-pass passage 78.
  • a main valve diaphragm 104 is positioned in the valve recess to define an operating chamber and has one side normally biased by the projection 92 into engagement with the truncated conical seat 80.
  • a retaining member 106 holds the diaphragm 104 in the recess 90.
  • a seal is provided between the housing 10 and the first annular groove 86 by rings 108 and 110.
  • An out let adapter 112 closes the second cavity 14 and is connected to a face mask (not shown).
  • the adapter includes an outlet passage 114, a valve seat 116, and at least one arcuate ambient or exhaust outlet 118.
  • Theoutlet adapter is attached to the housing by any suitable means, such as theill ustrated screw threads 120.
  • a second or inhalation-exhalation valve assembly 122 is positioned in the second cavity 14 between the main valve assembly and the outlet adapter and ineludes, see FIG. 5, 'a first seat member 124, a second seat member 126 and the grid or spider member 128.
  • the second seat member 126 and the grid'member 128 are composed of fairly rigid material while the first seat member 124 is made out of flexible elastomeric material.
  • the first seat member'l24 is an integral member which includes an annular skirt portion 130, an out-'- wardly extending radial flange 132, a radial web 134 extending inwardly until it forms a cylindrical portion 136 concentric with the skirt 1.30.
  • a bridge 138 is formed across the opening at one end of the cylindrical portion and has first and second flap valve portions 140 and 142 radially therefrom, and a centering projection 144 extends axially from the bridge.
  • the grid member 128 includes an annular ring portion 146 and intersecting radial grid arms 148. The ring portion 146 when assembled, engages in an annular recess 150 in the cylindrical portion 136 of first seat member 124.
  • the second seat member includes a depending skirt 152 and first and second radial :flanges 154 and 156, respectively.
  • the skirt 152 has an inner diameter which is almost the same as the outer diameterof the cylindrical portion 136.
  • the valve assembly is connected to a source of pressurized gas (not shown), which is preferably either oxygen or an air mixture by a fitting 158 having a bore 160 therein.
  • a filter 162 is mounted in the bore 74 of the valve housing.
  • a hose fitting (not shown) is connected to the fitting 158 to feed the pressurized fluid to the assembly. Additional filters (not shown) may be provided in either the hose or the hose fitting.
  • pressurized gas for example oxygen or an air mixture
  • a source not shown
  • a connecting hose and filters also not shown
  • the gas passes through bores 160 and 76, by-pass passage 78, first annular groove 86 and radial bore 94 to the operating chamber defined by valve recess 90.
  • first button 54 When operation of the valve assembly is desired, first button 54 is depressed against the bias of spring 62. Spring 60 will cause second button 56 to move with the first button until it contacts and depresses sensing diaphragm 42. The sensing diaphragm 42 will move into engagement with the pilot lever 30 and cause it to pivot about pin 32 until pad 36 clears the valve40.
  • the pilot 40 opens, pressurized gas will flow from the valve recess 90, through radial bore 94, outer groove 86, first bore 16, the sensing of chamber in first cavity 12, second bore 18, second cavity 14, flat valves and 142 to the outlet passage 114.
  • pilot valve 40 When this flow begins there will no longer be equal pressures acting on main valve diaphragm 104 and the main valve will open allowing direct passage of pressurized gas from inlet 74 through the open valve, second annular groove 88, arcuate slots 102, second cavity 14, flap valves 140 and 142 to outlet passage 114.
  • the ized gas flowing through pilot valve 40 will increase pressureon the sensing diaphragm 42 and tend to move it back against the force applied by second button 56.
  • the force of the gas pressure reaches a predetermined level, it will overcome the force exerted by spring 60 to drive the second button 56 backward despite continued pressure'on the first button 54.
  • This movement of the sensing diaphragm 42 out of contact with pilot lever 30 which will then pivot under the influence of spring 34 to close the pilot valve 40 and thus restore the equilibrium of the main valve.
  • the inhalation-exhalation valve will open by the central portion of thisvalve assembly moving away from seat 116 to provide passage for the ex hausted air to atmosphere through outlet ports 118.
  • the opening and closig movement of the inhalationexhalation valve assembly is enabled by the flexibilityof Y the web 134.
  • the main valve 82 will open only when there is a difference in thepressures applied to each side of the diaphragm 104, the valve being normally biased closed.
  • a pressure differential can be created either by actuation of the button assembly 50 and v the resultant opening of the pilot valve 40, as previously described, or bythe patient beginning to breath normally. in the latter case, each time thepatient inhales the flap valves 140 and 142 and the main valve will be opened since the inlet pressure to the assembly will exceed the outlet pressure.
  • the flat valves need for a separate check valve anda diaphragm and provides this function with a simipified inhalationexhalation valve assembly.
  • a demand valve assembly adapted to control gas fiowfrom a source of pressurized gas to a person using said apparatus, said demand valve assembly comprising a substantially cylindrical housing having an inlet opening and an outlet opening; normally closed, differential pressure actuated main valve means in said housing adapted to control flow from said inlet opening to said outlet opening, said main valve means including a valve body fixedly mounted in said housing and having an outer annular groove, an inner concentric annular groove, at lease one concentric arcuate slot communicating with said inner annular groove, a central concentric valve recess, and a radial bore connecting said outer.
  • control means includes pilot valve means having an element movable from a closed pilot valve position to an opening pilot valve position, and i x means biasing said movable element to a normally closed position, v said pilot valve means operating in said open pilot valve position to relieve pressure in said operating chamber to open said main valve means.
  • a demand valve assembly according to claim 2 and further comprising means to actuate said movable element of said pilot valve means including button means for manually moving said element, and I sensing diaphragm means responsive to pressures devcloped in said demand v'alve assembly" for overriding said button means, said button means including first and second coaxial buttons, first spring means biasing said first and second buttons axially apart, and
  • said outlet valve means includes an outlet member attached to said housing and defining said outlet opening, said outlet member including a first passage adapted for communication with a person using said apparatus, a second passage venting to atmosphere and a valve seat formed between said passages, and an inhalation-exhalation valve assembly mounted in said housing and having a unitary elastomeric flexible member forming an annular diaphragm portion cooperating with said outlet member valve seat to control communication between said first and second passages and a flap valve portion permitting flow only out of said housing and through said first axial passage, a rigid spider membermounted on said flexible member to support said flap valve portion, and a rigid annular seat member mounted on said flexible member to provide positive engagement with said outlet member valve seat and to hold said spider member in position 5.
  • a demand valve assembly according to claim 4 wherein said flexible seatmember has an annular skirt, a radial web connected to said skirt forming said diaphragm portion, an annular opening in said web having a bridge extending across the diameter thereof, and a pair of flaps radially extending from said bridge forming said flap valve portion.
  • a demand valve assembly for controlling a flow of pressurized gas comprising a housing having inlet means and outlet means; an inhalation-exhalation valve assembly disposed at said outlet means responsive to inhalation by a user to permit flow out of said outlet means and responsive to exhalation by a user to'provide a passage to the atmosphere;
  • a demand valve assembly according'to claim 29 wherein said main valve means includes a valve body having an outer annular groove, an
  • pilot valve means includes a pilot valve element movable in response to movement of said sensing diaphragm means from said second position closing off said conduit meansto said first position, and I spring means biasing said pilot valve element towards said second position.
  • a demand valve assembly according to claim 6 wherein said inhalation-exhalation valve assembly includes an outlet member having a first axial passage and a second coaxial passage separated by a valve seat, and
  • a flexible member mountedin said housing and having an annularrdiaphragm portion cooperating with said outlet member valve seat to control communi cation between said first and second passages and a flat valve portion permitting flow only out of said housing and through said first axial passage.
  • buttons assembly includes a button coaxially mounted with said member, first spring means biasingsaid button and said member apart and second spring means biasing said member away from said sensing diaphragm means.
  • a demand valve assembly according to claim 10 wherein said button has an inwardly extending flange, said member has a shoulder slidable in said button limited by abutment of said shoulder with said inwardly extending flange, and said first spring means includes a coiled spring mounted in compression between said button and said member to bias said shoulder against said inwardly extending flange.
  • a demand valve assembly according to claim 11 wherein said button assembly includes support means for mounting said buttonassembly on said housing including an inwardly extending flange, said button has an outwardly extending flange, and said second spring means includes a coiled spring mounted in compression between said support means and said button to bias said button assembly to an inoperative position with said outwardly extending flange of said button assembly abutting said inwardly extending flange of said support means and said member spaced from said sensing diaghragm means.
  • a breathing demand valve assembly for controlling the flow of gas from a source of pressurized gas to a user comprising a housing having an inlet passage and an outlet passage, a differential pressure actuated main valve for con trolling gas flow through said inlet passage, pilot valve means adapted to control operation of said main valve including a pilot valve element movable one position to another control pressure at said main valve and means to actuate said pilot valve element, and a second valve means adapted to control flow of the gas through said outlet passage and to vent to atmosphere exhaust gas from a user, said second valve means including an outlet member attached to said housing and having a first axial passage adapted forcommunication with a user, a second coxi'alpassage venting to atmosphere and an annular valve seat formed between said passage, and an inhalation-exhalation valve assembly mounted in said housing and having a unitary elastomeric flexible member forming an annular diaphragm portion cooperating with said outlet member valve seat to control communication between said first and second passages and a flat valve portion permitting flow only out of
  • a demand valve assembly according to claim 13 wherein said unitary flexible member has an annular skirt, l a radial web connected to said skirt forming said diaphragm portion, I an annular opening in said web having a bridge extending across the diameter thereof, and a pair of flaps radially extending from said bridge forming said flap valve portion.
  • said means to actuate said pilot valve element includes manully actuable button means adapted to move said element to the open position
  • first and second concentric, oppositely acting buttons biasing saidfirst and second buttons axially apart
  • second spring means biasing said first and second buttons to a position with said second button out of contact with said sensing diaphragm.

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  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
  • Emergency Medicine (AREA)
  • Pulmonology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)
US00238502A 1972-03-27 1972-03-27 Demand valve assembly for use with breathing or resuscitation equipment Expired - Lifetime US3795257A (en)

Applications Claiming Priority (1)

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US23850272A 1972-03-27 1972-03-27

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JP (1) JPS498093A (enrdf_load_html_response)
CA (1) CA976055A (enrdf_load_html_response)
FR (1) FR2177977B1 (enrdf_load_html_response)
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Cited By (28)

* Cited by examiner, † Cited by third party
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DE3135276A1 (de) * 1980-09-12 1982-06-09 Puritan-Bennett Corp., Kansas City, Mo. Wiederbelebungsgeraet
US4501271A (en) * 1981-10-13 1985-02-26 John William Spear Resuscitator
US4572175A (en) * 1983-07-20 1986-02-25 Flynn Stephen D Multi-mode demand valve
US4774941A (en) * 1983-05-04 1988-10-04 Intertech Resources Inc. Resuscitator bag
US4832016A (en) * 1988-03-10 1989-05-23 Kent Berg Remotely controlled actuator for a resuscitator
US4898174A (en) * 1988-05-03 1990-02-06 Life Support Products, Inc. Automatic ventilator
US4971108A (en) * 1986-09-19 1990-11-20 Mark Gottlieb Inhalation responsive gas pressure regulator
US5002050A (en) * 1986-09-17 1991-03-26 Mcginnis Gerald E Medical gas flow control valve, system and method
DE4106071A1 (de) * 1991-02-27 1992-09-03 Morlock Gmbh Membranbaueinheit
DE4120609C1 (en) * 1991-06-20 1993-02-11 Wiest, Peter P., Dipl.-Ing., 1000 Berlin, De Gas connector for insufflation appts. - has pressure reducer, safety valve, pressure indicator and gas outlet union with magnetic valve
US5429124A (en) * 1992-12-22 1995-07-04 Zexel Corporation Mouthpiece for semi-closed type of breathing apparatus
WO1995019814A1 (en) * 1994-01-21 1995-07-27 Pim De Bruijn Respiration air supply system
US5630411A (en) * 1993-01-12 1997-05-20 Nellcor Puritan Bennett Incorporated Valve for use with inhalation/exhalation respiratory phase detection circuit
US5749358A (en) * 1996-10-10 1998-05-12 Nellcor Puritan Bennett Incorporated Resuscitator bag exhaust port with CO2 indicator
US5787882A (en) * 1996-06-21 1998-08-04 Computer Assisted Engineering Demand valve resuscitator
US5839436A (en) * 1992-09-11 1998-11-24 Life Support Products, Inc. Demand valve with a reduced manual flow control
USD424193S (en) * 1998-10-15 2000-05-02 Ntc Technology, Inc. Airway valve
US6098622A (en) * 1998-10-15 2000-08-08 Ntc Technology Inc. Airway valve to facilitate re-breathing, method of operation, and ventilator circuit so equipped
US6123674A (en) * 1998-10-15 2000-09-26 Ntc Technology Inc. Airway valve to facilitate re-breathing, method of operation, and ventilator circuit so equipped
US6364161B1 (en) * 2000-09-27 2002-04-02 Victor Equipment Company Oxygen conserver
US20020162553A1 (en) * 2001-05-07 2002-11-07 Hamilton Robert M. Portable gas powered positive pressure breathing apparatus and method
US6634357B1 (en) 2000-02-22 2003-10-21 Life Support Technology, Inc. Resuscitation valve assembly
US20040089294A1 (en) * 2002-11-12 2004-05-13 Hsing-Chi Hsieh Diaphragm holder for pressure regulator of air tank used in diving
US20040244797A1 (en) * 2003-06-06 2004-12-09 Jackson Peter J. Demand valves for breathing apparatus
US20080223368A1 (en) * 2007-03-16 2008-09-18 Drager Medical Ag & Co. Kg Dispensing valve for breathing gas
US20120260919A1 (en) * 2011-04-18 2012-10-18 Draeger Safety Uk Limited Diaphragm
CN103182129A (zh) * 2011-12-30 2013-07-03 北京谊安医疗系统股份有限公司 旁通阀
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US4774941A (en) * 1983-05-04 1988-10-04 Intertech Resources Inc. Resuscitator bag
US4572175A (en) * 1983-07-20 1986-02-25 Flynn Stephen D Multi-mode demand valve
US5002050A (en) * 1986-09-17 1991-03-26 Mcginnis Gerald E Medical gas flow control valve, system and method
US4971108A (en) * 1986-09-19 1990-11-20 Mark Gottlieb Inhalation responsive gas pressure regulator
US4832016A (en) * 1988-03-10 1989-05-23 Kent Berg Remotely controlled actuator for a resuscitator
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DE4106071A1 (de) * 1991-02-27 1992-09-03 Morlock Gmbh Membranbaueinheit
DE4120609C1 (en) * 1991-06-20 1993-02-11 Wiest, Peter P., Dipl.-Ing., 1000 Berlin, De Gas connector for insufflation appts. - has pressure reducer, safety valve, pressure indicator and gas outlet union with magnetic valve
US5839436A (en) * 1992-09-11 1998-11-24 Life Support Products, Inc. Demand valve with a reduced manual flow control
US5429124A (en) * 1992-12-22 1995-07-04 Zexel Corporation Mouthpiece for semi-closed type of breathing apparatus
US5630411A (en) * 1993-01-12 1997-05-20 Nellcor Puritan Bennett Incorporated Valve for use with inhalation/exhalation respiratory phase detection circuit
WO1995019814A1 (en) * 1994-01-21 1995-07-27 Pim De Bruijn Respiration air supply system
NL9400102A (nl) * 1994-01-21 1995-09-01 Pim De Bruijn Ademluchttoevoerstelsel.
US5787882A (en) * 1996-06-21 1998-08-04 Computer Assisted Engineering Demand valve resuscitator
US5749358A (en) * 1996-10-10 1998-05-12 Nellcor Puritan Bennett Incorporated Resuscitator bag exhaust port with CO2 indicator
USD424193S (en) * 1998-10-15 2000-05-02 Ntc Technology, Inc. Airway valve
US6098622A (en) * 1998-10-15 2000-08-08 Ntc Technology Inc. Airway valve to facilitate re-breathing, method of operation, and ventilator circuit so equipped
US6123674A (en) * 1998-10-15 2000-09-26 Ntc Technology Inc. Airway valve to facilitate re-breathing, method of operation, and ventilator circuit so equipped
US6634357B1 (en) 2000-02-22 2003-10-21 Life Support Technology, Inc. Resuscitation valve assembly
US6364161B1 (en) * 2000-09-27 2002-04-02 Victor Equipment Company Oxygen conserver
US20020162553A1 (en) * 2001-05-07 2002-11-07 Hamilton Robert M. Portable gas powered positive pressure breathing apparatus and method
US8365728B2 (en) 2001-05-07 2013-02-05 Emergent Respiratory Llc Portable gas powered positive pressure breathing apparatus and method
US7066175B2 (en) 2001-05-07 2006-06-27 Emergent Respiratory Products, Inc. Portable gas powered positive pressure breathing apparatus and method
US20060243278A1 (en) * 2001-05-07 2006-11-02 Hamilton Robert M Portable gas powered positive pressure breathing apparatus and method
US7721735B2 (en) 2001-05-07 2010-05-25 Emergent Respiratory Products, Inc. Portable gas powered positive pressure breathing apparatus and method
US20100199985A1 (en) * 2001-05-07 2010-08-12 Hamilton Robert M Portable gas powered positive pressure breathing apparatus and method
WO2002089873A3 (en) * 2001-05-07 2003-12-04 Life Support Technology Inc Pressure regulating valve and positive pressure ventilation system
US20040089294A1 (en) * 2002-11-12 2004-05-13 Hsing-Chi Hsieh Diaphragm holder for pressure regulator of air tank used in diving
US20040244797A1 (en) * 2003-06-06 2004-12-09 Jackson Peter J. Demand valves for breathing apparatus
US7111625B2 (en) * 2003-06-06 2006-09-26 International Safety Instruments, Inc. Demand valves for breathing apparatus
US20080223368A1 (en) * 2007-03-16 2008-09-18 Drager Medical Ag & Co. Kg Dispensing valve for breathing gas
US8109270B2 (en) * 2007-03-16 2012-02-07 Dräger Medical GmbH Dispensing valve for breathing gas
US20120260919A1 (en) * 2011-04-18 2012-10-18 Draeger Safety Uk Limited Diaphragm
US8985110B2 (en) * 2011-04-18 2015-03-24 Draeger Safety Uk Limited Diaphragm
US9498657B2 (en) 2011-04-18 2016-11-22 Draeger Safety Uk Limited Diaphragm
CN103182129A (zh) * 2011-12-30 2013-07-03 北京谊安医疗系统股份有限公司 旁通阀
WO2013097688A1 (zh) * 2011-12-30 2013-07-04 北京谊安医疗系统股份有限公司 旁通阀
US8967194B2 (en) 2011-12-30 2015-03-03 Beijing Aeonmed Co., Ltd. Bypass valve
CN103182129B (zh) * 2011-12-30 2015-12-09 北京谊安医疗系统股份有限公司 旁通阀
EA025719B1 (ru) * 2011-12-30 2017-01-30 Бейджин Аеонмед Ко., Лтд. Перепускной клапан
EP3406290A1 (en) * 2017-05-25 2018-11-28 MGC Diagnostics Corporation Solenoid controlled respiratory gas demand valve

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FR2177977B1 (enrdf_load_html_response) 1977-02-11
GB1382404A (en) 1975-01-29
FR2177977A1 (enrdf_load_html_response) 1973-11-09
JPS498093A (enrdf_load_html_response) 1974-01-24
CA976055A (en) 1975-10-14

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