US3608574A - Diaphragm-valve especially for a respiratory-gas supply system - Google Patents

Diaphragm-valve especially for a respiratory-gas supply system Download PDF

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Publication number
US3608574A
US3608574A US782151A US3608574DA US3608574A US 3608574 A US3608574 A US 3608574A US 782151 A US782151 A US 782151A US 3608574D A US3608574D A US 3608574DA US 3608574 A US3608574 A US 3608574A
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United States
Prior art keywords
diaphragm
casing
valve
lip
flat portion
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
US782151A
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English (en)
Inventor
Raymond Beaussant
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.)
Safran Aerosystems SAS
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Intertechnique SA
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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
    • A62B9/027—Breathing demand regulators pilot operated, i.e. controlled by valve means sensitive to a reduced downstream pressure
    • 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
    • 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
    • F16K15/02—Check valves with guided rigid 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
    • F16K15/148—Check valves with flexible valve members the closure elements being fixed in their centre
    • 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
    • F16K15/148—Check valves with flexible valve members the closure elements being fixed in their centre
    • F16K15/1481—Check valves with flexible valve members the closure elements being fixed in their centre with biasing means in addition to material resiliency, e.g. spring
    • 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
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
    • F16K17/0413—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded in the form of closure plates
    • 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
    • Y10T137/7837—Direct response valves [i.e., check valve type]
    • Y10T137/7838—Plural
    • Y10T137/7841—One valve carries head and seat for second 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]
    • Y10T137/7879—Resilient material 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]
    • Y10T137/7879—Resilient material valve
    • Y10T137/7888—With valve member flexing about securement
    • Y10T137/789—Central mount
    • 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]
    • Y10T137/7904—Reciprocating valves
    • 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]
    • Y10T137/7904—Reciprocating valves
    • Y10T137/7905—Plural biasing means

Definitions

  • a diaphragm-valve especially for a respiratorygas supply system, comprising a flat diaphragm of revolution about an axis, a sealing lip adapted to cooperate with a seating and added to said diaphragm in the vicinity of its periphery, said lip having a substantially conical profile whose vertex is located on said axis on the gas inlet side of said diaphragm, and a bellows element which forms an extension of said flat diaphragm on the side remote from said lip, said bellows element being made integral at one end thereof with said diaphragm and secured in position at the other end thereof by means of an annular flange, said lip
  • This invention relates to a diaphragm-valve which is designed primarily for use in a system comprising a pressure and flow regulator for supplying a respiratory gas, although other applications may be contemplated.
  • a regulator of this type comprises essentially a main valve which separates the breathing mask from the gas inlet pipe and the open or closed position of which is controlled by the pressure within an intermediate chamber or so-called demand chamber. This pressure is controlled by a demand valve which is in turn actuated by a "demand" diaphragm.
  • the demand diaphragm is actuated by the depression produced as a-result of inhalation by the wearer of the breathing mask. It should be noted in addition that, under certain conditions of use, it is necessary to supply the respiratory gas at overpressure. In this case, the breathing mask must be associated with an apparatus for regulating this overpressure which is applied to one face of the demand diaphragm.
  • an expiratory valve whereby the exhaled gases are discharged from the mask to the ambient air, said expiratory valve being usually completely independent of that portion of the device which allows gas to enter the mask.
  • the overpressure must be applied to one face of the expiratory valve which is then referred to as a compensated respiratory valve.
  • the aim of the present invention is to provide a diaphragmvalve which is fabricated from an elastomer such as silicone rubber, for example, which makes it possible to combine into a single element both a compensation bellows within which the overpressure is applied and the expiratory valve of systems which are already known.
  • the diaphragm-valve which is formed of a flexible and deformable material essentially comprises a flat diaphragm of revolution about an axis, a sealing lip adapted to cooperate with a seating and added to said diaphragm in the vicinity of its periphery, said lip having a substantially conical profile whose vertex is located on said axis on the gas inlet side of said diaphragm, and a bellows element which forms an extension of said flat diaphragm of the side remote from said lip, said bellows element being made integral at one end thereof with said diaphragm and secured in position at the other end thereof by means of an annular flange, said lip having a diameter of contact with said seating which is substantially identical with the effective diameter of said bellows element.
  • FIG. I is a vertical sectional view depicting the diaphragmvalve of the present invention.
  • FIGS. 2-6 are views similar to FIG. I but depicting alternate embodiments of the diaphragm-valve of the present invention.
  • the diaphragm-valve I under consideration is essentially composed of a cup 2 which forms the diaphragm and terminates in an annular flange 3 for the purpose of clamping said diaphragm between a member 4 and a plate 5 which is inserted and locked in position with respect to said member by means of a retaining ring 6 which is screwed into this latter.
  • the cup 2 has a general shape of revolution about an axis (not shown) and comprises a flat bottom portion 7 to which is added a peripheral lip 8 having a profile which is substantially that of a cone, the vertex of which is located on the axis of revolution of the cup.
  • Said lip 8 constitutes the moving element of a valve whose seat is formed by the bevelled rim 9 of a flange 10 formed in a casing ill inside which the diaphragm-valve under consideration is placed.
  • the inspiratory duct 12 serves to connect the casing to a breathing mask (not shown in the drawings) and the expiratory duct H3 provides a vent to the surrounding atmosphere.
  • the casing 1111 is associated with a regulator unit for a respiratory-gas supply system.
  • the chamber 14 can be maintained at an overpressure which can be regulated with respect to a reference pressure, especially as a function of the ambient air pressure.
  • the overpressure which is thus maintained within said chamber 14 is such as to apply the lip 8 of the diaphragm-valve against its seating 9.
  • the assembly of the diaphragm-valve is identical with that which is contemplated in connection with FIG. 1.
  • the bottom portion 7 of the cup 2 is provided with an axial opening 16 in which is mounted a connector 17 and this latter is attached to the bore 15 which serves to produce the requisite operating overpressure within the chamber 114.
  • This mode of assembly has the advantage of affording protection for the pipe 15 by placing this latter inside the casing 11.
  • the connector 17 which comes into contact with the plate 5 provides the diaphragm-valve l with a fixed point about which the edges of the bottom portion 7 are capable of pivoting when the lip 8 lifts from its seating.
  • the diaphragm-valve l is associated with an auxiliary valve 18 which performs the function of inspiratory valve in order that the oxygen or oxygen-air mixture which must necessarily be supplied to the user may thereby be permitted to pass through the duct 12 to the breathing mask.
  • said auxiliary valve comprises a central stem 19 which is fitted within a bore 20 formed at the center of the bottom portion 7 of the cup 2. Said stem is joined to a disc 21 of elastomer material which forms the active portion of the valve 18 and is adapted to cooperate with a seating 22 consisting of an annular bead which is formed in relief on the underface of the bottom portion 7.
  • the operation of the diaphragm-valve 11 is similar to that which has been described in reference to FIGS. 1 and 2.
  • the reference numeral 23 designates a flexible hose which connects the casing ill to the respiratory gas supply.
  • valve B8 is of slightly different design
  • the lip 8 of valve is joined to a flat portion 24 which is parallel with the bottom portion 7 of the cup and which is in turn joined to this latter by means of a ring 25, the stem of the auxiliary valve 18 being mounted within the bore 26 of said ring.
  • a free space 27 Between the portion 24 of the lip 8 and the bottom portion 7, there is thus formed a free space 27, thereby permitting the cup 2 to undergo an accidental relative displacement along its axis without any influence on the position of the lip 8, which remains applied against its seating 9.
  • the bottom portion 7 of the diaphragm-valve is fitted with a pad 28 placed at the center of the diaphragm and overlapping on both faces of this latter, said pad being mounted in such a manner as to cooperate with the extremity 29 of a lever 30 which is pivoted to the casing 11 about a pin 31.
  • Said lever 30 is provided with a lateral toggle arm 32 fitted with a pin 33, said pin being slidably fitted in a fork 34 provided at the ex tremity of a second lever 35 which is in turn pivotally attached at 36.
  • the stem 38 of a valve 39 is pivoted to said second lever 35 about a pin 37.
  • valve 39 establishes a communication between the inspiratory duct 12 which links the casing 11 to the breathing mask and a duct 40 which can be the respiratory gas inlet duct.
  • the valve 39 which constitutes the main delivery valve of the apparatus is closed during the exhalation stage in which the lip 8 is lifted from its seating 9 in accordance with the process already described.
  • the diaphragm-valve 1 directly performs the function of demand valve by means of its pad 28.
  • the pad normally closes off the end of a duct 41 which is put into communication with a chamber 42 formed within the casing 11.
  • Said chamber 42 is delimited by a diaphragm 43 and is supplied with respiratory gas or with one of the constituents of the breathing mixture across a flow-limiting element 45 which is connected into the general supply pipe 46 of the device and via a duct 44.
  • said pipe 46 serves to supply oxygen which can be mixed in a suitable proportion with air, the air being admitted through a second pipe 47 which is independent of the first.
  • the diaphragm 43 is in contact with a seating 48 so as to close off a duct 49 through which the air-oxygen mixture derived from the pipes 46 and 47 and constituting the respiratory gas supply is delivered to the breathing mask.
  • the portion of the pad 28 which is remote from the chamber 14 can be subjected to the action of a positionally adjustable spring 50 which is applied against the corresponding face of the diaphragm-valve 1 under the action of a screw l1.
  • the chamber 14 can be connected by way of a pipe 52 to a regulating system (not shown in the drawings) whereby the overpressure within the chamber 14 can be regulated in accordance with a predetermined law.
  • the chamber 14 is maintained at a variable overpressure as previously stated.
  • the diaphragm-valve l performs the function of a compensated expiratory valve.
  • the pressure in the chamber 42 is such that the diaphragm 43 is applied against its seating 48.
  • the depression produced beneath the diaphragm-valve l which communicates with the mask via the inspiratory duct 12 causes the pad 28 to disengage from the end of the duct 41; the pressure within the chamber 42 thus drops rapidly, the diaphragm 43 lifts from its seating 48 and permits the respiratory gases to flow out through the duct 49.
  • the diaphragm-valve under consideration offers a large number of advantages which essentially arise from its simplicity of construction and from the fact that a shutoff valve and a diaphragm or compensation bellows can be manufactured as a single component.
  • a suitable choice of elastomer as constituent material of the diaphragm-valve it is also possible to obtain excellent leaktightness which is maintained in all possible orientations of the apparatus.
  • the influence of accelerations can be considered as practically zero.
  • a fluid flow control device comprising a hollow casing having an inlet and an outlet; a circular valve seat extending between said inlet and outlet; a membrane disposed in said casing and comprising a flat portion having one face exposed to said inlet. a bellows portion extending from the other face of the flat portion and fixed with respect to said casing, said bellows portion having an effective diameter substantially equal to the diameter of said valve seat, and a frustoconical lip portion extending from the rim of said flat portion for contacting said valve seat; and means to exert a predetermined pressure against said other face of said flat portion to urge the inner surface of said lip portion against said valve seat and prevent fluid flow through said casing, whereby a fluid in troduced into said casing through said inlet of a pressure greater than said predetermined pressure moves said lip portion away from said valve seat to permit fluid flow through said casing.

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  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Pulmonology (AREA)
  • General Health & Medical Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Mechanical Engineering (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)
US782151A 1967-12-19 1968-12-09 Diaphragm-valve especially for a respiratory-gas supply system Expired - Lifetime US3608574A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR132966 1967-12-19

Publications (1)

Publication Number Publication Date
US3608574A true US3608574A (en) 1971-09-28

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US782151A Expired - Lifetime US3608574A (en) 1967-12-19 1968-12-09 Diaphragm-valve especially for a respiratory-gas supply system

Country Status (4)

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US (1) US3608574A (de)
DE (1) DE1814300C3 (de)
FR (1) FR1557809A (de)
GB (1) GB1214907A (de)

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3724482A (en) * 1970-03-05 1973-04-03 Aga Ab Breathing valve
US3739801A (en) * 1971-12-06 1973-06-19 Rudolph H Low actuating pressure type valve structure
US3822819A (en) * 1972-07-10 1974-07-09 S Wilson Fastener driving tool with improved valve
US3968812A (en) * 1971-10-12 1976-07-13 Instrumentation Industries, Inc. Apparatus for removal of condensed moisture from respiratory tubes
US4190045A (en) * 1978-04-24 1980-02-26 Bourns Medical Systems, Inc. Noise reducing exhalation valve and diaphragm
US4209485A (en) * 1977-05-03 1980-06-24 Greenspan Donald J Method of making a valve apparatus
US4915106A (en) * 1988-02-26 1990-04-10 Puritan-Bennett Corporation Crew oxygen mask with pneumatic comfort adjustment
US5560354A (en) * 1993-06-18 1996-10-01 Rescare Limited Facial masks for assisted respiration or CPAP
US5725017A (en) * 1997-01-27 1998-03-10 Medtronic, Inc. In-line pressure check valve for drug-delivery systems
US5954052A (en) * 1997-05-21 1999-09-21 Nellcor Puritan-Bennett Safety stowage apparatus for crew oxygen masks
US6039045A (en) * 1987-04-22 2000-03-21 Intertechnique Head harness for respiratory mask
US6401716B1 (en) 1995-08-01 2002-06-11 Scott Technologies, Inc. Quick donning goggles for use with breathing mask
US6550493B2 (en) 2001-06-13 2003-04-22 Baxter International Inc. Vacuum demand valve
US6554023B2 (en) 2001-06-13 2003-04-29 Baxter International Inc. Vacuum demand flow valve
US20040011405A1 (en) * 2002-03-12 2004-01-22 Danby Hal C. Vacuum demand flow valve
US20040060598A1 (en) * 2001-06-13 2004-04-01 Hal Danby Vacuum demand flow valve
USD493866S1 (en) 2001-06-13 2004-08-03 Baxter Intl. Inc Valve
USD499793S1 (en) 2003-03-17 2004-12-14 Baxter International Inc. Valve
US20050017213A1 (en) * 2002-03-12 2005-01-27 Swan Julian F.R. Valve stop
US20060103686A1 (en) * 2004-11-13 2006-05-18 Sikora Robert M Reflective fluidics matrix display particularly suited for large format applications
US20090101149A1 (en) * 2006-04-20 2009-04-23 Leopoldine Bachelard Breathing apparatus for an aircrew member
US20090162707A1 (en) * 2006-08-29 2009-06-25 Canon Kabushiki Kaisha Pressure control valve, method of producing pressure control valve, fuel cell system with pressure control valve, and method of controlling pressure
US20100043887A1 (en) * 2007-03-24 2010-02-25 Schlumberger Technology Corporation Backflow and flow rate control valve
CN107693979A (zh) * 2017-11-19 2018-02-16 陈爱军 一种四边形方管阀
WO2018077618A1 (de) * 2016-10-24 2018-05-03 Hamilton Medical Ag Exspirationsventil für eine beatmungsvorrichtung mit geräuschemissionsreduzierter ventilgestaltung
US10137318B2 (en) 2011-02-21 2018-11-27 Zodiac Aerotechnics Aircraft demand regulator and dilution regulation method

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE31785E (en) * 1978-08-07 1985-01-01 Figgie International, Inc. Breathing valve assembly with diaphragm control of the exhaust ports
US4253455A (en) * 1978-08-07 1981-03-03 A-T-O Inc. Breathing valve assembly with diaphragm control of the exhaust ports
IL67635A (en) * 1983-01-07 1988-03-31 Rosenberg Peretz Fluid flow control device particularly useful as a drip irrigation emitter
FR2563739B1 (fr) * 1984-03-14 1988-11-04 Intertechnique Sa Soupape compensee pour dispositif d'alimentation en gaz respiratoire
FR2695976B1 (fr) * 1992-09-24 1994-12-02 Intertechnique Sa Soupape de régulation compensée.
FR2827179B1 (fr) 2001-07-10 2004-02-20 Intertechnique Sa Appareil respiratoire a limiteur de debit

Citations (10)

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Publication number Priority date Publication date Assignee Title
DE48105C (de) * A. KAISER in Berlin W., Königgrätzerstrafse 10 Rückschlagventil mit biegsamer Platte und Schutzrohr
US1294003A (en) * 1918-04-04 1919-02-11 Fred T Weaver Cut-off.
US1939911A (en) * 1932-07-06 1933-12-19 Westinghouse Air Brake Co Angle cock device
US2181900A (en) * 1936-10-06 1939-12-05 Jesse D Langdon Piston and flush valve
US2270838A (en) * 1940-03-26 1942-01-20 Eureka Vacuum Breaker Corp Siphon breaker and valve
US2478496A (en) * 1949-08-09 Thermostatic safety burner control
US2641273A (en) * 1947-10-18 1953-06-09 C O Two Fire Equipment Co Changeover valve
US3307633A (en) * 1963-11-25 1967-03-07 Grinnell Corp Resilient, one-piece sealing member for accommodating unequal fluid pressures on opposing surfaces
US3435839A (en) * 1965-05-21 1969-04-01 Elder Oxygen Co Inc Backflow bypassing valve for breathing apparatus
US3468511A (en) * 1966-12-19 1969-09-23 Robertshaw Controls Co Anti-hunting diaphragm valves

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1076498B (de) * 1957-12-11 1960-02-25 Draegerwerk Ag Lungengesteuertes Membranventil fuer die Atemgaszufuehrung bei Atemgeraeten

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE48105C (de) * A. KAISER in Berlin W., Königgrätzerstrafse 10 Rückschlagventil mit biegsamer Platte und Schutzrohr
US2478496A (en) * 1949-08-09 Thermostatic safety burner control
US1294003A (en) * 1918-04-04 1919-02-11 Fred T Weaver Cut-off.
US1939911A (en) * 1932-07-06 1933-12-19 Westinghouse Air Brake Co Angle cock device
US2181900A (en) * 1936-10-06 1939-12-05 Jesse D Langdon Piston and flush valve
US2270838A (en) * 1940-03-26 1942-01-20 Eureka Vacuum Breaker Corp Siphon breaker and valve
US2641273A (en) * 1947-10-18 1953-06-09 C O Two Fire Equipment Co Changeover valve
US3307633A (en) * 1963-11-25 1967-03-07 Grinnell Corp Resilient, one-piece sealing member for accommodating unequal fluid pressures on opposing surfaces
US3435839A (en) * 1965-05-21 1969-04-01 Elder Oxygen Co Inc Backflow bypassing valve for breathing apparatus
US3468511A (en) * 1966-12-19 1969-09-23 Robertshaw Controls Co Anti-hunting diaphragm valves

Cited By (44)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3724482A (en) * 1970-03-05 1973-04-03 Aga Ab Breathing valve
US3968812A (en) * 1971-10-12 1976-07-13 Instrumentation Industries, Inc. Apparatus for removal of condensed moisture from respiratory tubes
US3739801A (en) * 1971-12-06 1973-06-19 Rudolph H Low actuating pressure type valve structure
US3822819A (en) * 1972-07-10 1974-07-09 S Wilson Fastener driving tool with improved valve
US4209485A (en) * 1977-05-03 1980-06-24 Greenspan Donald J Method of making a valve apparatus
US4190045A (en) * 1978-04-24 1980-02-26 Bourns Medical Systems, Inc. Noise reducing exhalation valve and diaphragm
US6039045A (en) * 1987-04-22 2000-03-21 Intertechnique Head harness for respiratory mask
US4915106A (en) * 1988-02-26 1990-04-10 Puritan-Bennett Corporation Crew oxygen mask with pneumatic comfort adjustment
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Also Published As

Publication number Publication date
FR1557809A (de) 1969-02-21
GB1214907A (en) 1970-12-09
DE1814300C3 (de) 1971-02-20
DE1814300A1 (de) 1969-09-25
DE1814300B2 (de) 1970-07-09

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