US3435822A - Breathing apparatus with fluid diode valve - Google Patents

Breathing apparatus with fluid diode valve Download PDF

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Publication number
US3435822A
US3435822A US3435822DA US3435822A US 3435822 A US3435822 A US 3435822A US 3435822D A US3435822D A US 3435822DA US 3435822 A US3435822 A US 3435822A
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United States
Prior art keywords
fluid
flow
pressure
mouthpiece
channel
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Expired - Lifetime
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English (en)
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Hermann Ziermann
Robert E Olson
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RTX Corp
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United Aircraft Corp
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Priority claimed from US467838A external-priority patent/US3379194A/en
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    • 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
    • A61M16/14—Preparation of respiratory gases or vapours by mixing different fluids, one of them being in a liquid phase
    • A61M16/16—Devices to humidify the respiration air
    • 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
    • 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
    • A61M16/08—Bellows; Connecting tubes ; Water traps; Patient circuits
    • A61M16/0816—Joints or connectors
    • A61M16/0841—Joints or connectors for sampling
    • A61M16/0858—Pressure sampling ports
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B7/00—Respiratory apparatus
    • 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
    • A61M16/0057—Pumps therefor
    • A61M16/0063—Compressors
    • 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
    • Y10S128/00—Surgery
    • Y10S128/10—Fluid amplifiers
    • 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
    • Y10T137/206—Flow affected by fluid contact, energy field or coanda effect [e.g., pure fluid device or system]
    • Y10T137/218—Means to regulate or vary operation of device
    • 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
    • Y10T137/206—Flow affected by fluid contact, energy field or coanda effect [e.g., pure fluid device or system]
    • Y10T137/2229—Device including passages having V over T configuration
    • Y10T137/2234—And feedback passage[s] or path[s]

Definitions

  • a fluid diode in the inhalation channel of a pure fluid amplifier for a respirator decouples the channel from the inner action region in combination with a flow control valve in the same channel for permitting selection of flow without changing the switching pressure.
  • This invention relates to respirators of the types that can assist or control respiration utilizing pure fluid amplifiers.
  • the respirator is a device intended to assist a patient, generally, one afflicted by certain pulmonary diseases, in breathing.
  • this device may be employed as a respirator which provides an assist to the patient so that relatively little effort on the part of the patient is required to effectuate breathing, and in others it can be employed as a resuscitator to provide positive breathing.
  • respiratory devices While there are presently a number of respiratory devices available, these devices are characterized as being very costly and/or operate by a very high pressure which are occasioned by the fact that they require a number of moving parts such as valves operated by diaphragms and bellows.
  • the complexity of the respirator which obviously materially affects the cost thereof can be reduced by utilizing a pure fluid amplifier which switches without the use of any moving parts the fluid from a source of pressure to supply a certain predetermined volume of fluid during the inhalation cycle and then utilizing the pressure from the source to assist during the exhalation cycle.
  • the patients breathing etfort is significantly reduced and hence, requires substantially little elfort to provide the switching from the inhalation to the exhalation cycles.
  • this type of respirator it is pos sible to provide up to 90 liters per minute of air with as little as 2-4 p.s.i. at the power nozzle of the fluid amplifier.
  • a fluid amplifier is basically a device in which an input or power fluid flow is modulated between two or more output channels by the application of a control fluid stream generally disposed at right angles to the power fluid flow at the inter-action section of the fluid amplifier.
  • a control fluid stream generally disposed at right angles to the power fluid flow at the inter-action section of the fluid amplifier.
  • pure fluid amplifiers reference should be made to US. Patent No. 3,122,165 issued to B. M. Horton.
  • the respirator must, whether for home or clinical use, be able to supply variable volumes of air inasmuch as lung capacities of different patients vary.
  • the type of respirator constituting the present invention operates at a substantially low pressure in comparison to the prior art respirators.
  • the volume can be altered, one is by supplying more air to the input of the fluid amplifier by increasing the output of the compressor or source of pressurized air and second, to provide additional flow by controlling the output of the amplifier. In either situation care must be taken to assure that the pressure in the mouthpiece or that which enters into the lungs does not exceed an intolerable level which may result in injury to the patient.
  • Two flow controls may be provided such that one of the controls has a varying pressure and the other varies the flow without a pressure change.
  • the respirator must assure that the pressure in the mouthpiece or that which enters into the lungs does not suddenly increase or decrease but rather goes through a smooth transition change without imposing injury or uncomfort to the user. It has been found that this smooth transition can be accomplished by closely controlling the geometry of the inner action region and also by providing in the feedback loop of the fluid amplifier a positive pressure control and in another feedback loop a negative pressure control interconnecting an outlet passage communicating to ambient. These controls are manually adjusted to set an area in these feedback passages and serve to provide a smooth and gradual transition from inhalation to exhalation and vice versa.
  • a feedback loop is also provided in the exhalation passage and a manual control is inserted therein which serves to adjust the ratio of inhalation to exhalation cycles.
  • respirator As an assist type of respirator it is noted that the actual control of the inhalation and exhalation cycle is done by the patient by his own impetus in breathing. The respirator is set for a predetermined ratio of exhalation to inhalation. However, the impetus of the switching occurred by the breathing of the patient overrides this ratio but since the fluid amplifier is set for a natural or normal ratio, a little additional elfort is required by the patient to overcome this natural setting. However, once the breather becomes accustomed to the respirator with the set inhalation to exhalation ratio he will eventually come into rhythm with this setting.
  • a double feedback loop may be utilized to bias the control port with the flow in the inlet or outlet output channels for reducing the patients efiort necessary to eflectuate switching from the inhalation to exhalation cycles.
  • the respirator must also assure that during the inhalation cycle the flow can be regulated without a pressure change and the pressure can be regulated without a flo'w change, and also during the exhalation cycle excessive ambient air must not be induced in the inhalation passage.
  • the diode valve is judiciously inserted in the fluid amplifier and serves to decouple the output load (mouthpiece) and the inner action region of the amplifier during the inhalation cycle.
  • the flow control valve inserted in the fluid amplifier is utilized to adjust the flow to the patients lungs yet without changing the mouthpiece pressure at which the fluid amplifier switches from inhalation to exhalation.
  • a manual positive pressure control in the feedback loop can be utilized to adjust the switching pressure without affecting the flow.
  • a still further object of this invention is to provide means to decouple the load from the inner action region of the fluid amplifier.
  • a still further object of this invention is to utilize a fluid diode valve judiciously located in the fluid amplifier so as to assure that pressure switchover changes do not disturb the flow and that flow changes do not disturb pressure switchover level.
  • FIGURE 1 is a perspective view of the entire respirator as packaged as a portable unit.
  • FIGURE 2 is an exploded perspective view of the amplifier and its various controls.
  • FIGURE 3 is an elevated view of the diode valve.
  • FIGURE 4 is a sectional view taken along lines 44 of FIG. 3.
  • the respirator comprises basically a compressor generally illustrated by numeral 10, the fluid amplifier generally illustrated by numeral 12, mouthpiece 14 and a nebulizer 16 inserted between the mouthpiece and the amplifier 12.
  • Compressors that are currently available inherently produce a pressure pulsation in the discharge flow which may be eliminated by incorporating an accumulator which is illustrated by numeral 18.
  • the accumulator is merely a plenum chamber that is inserted between the fluid amplifier and the discharge end of the compressor. Suitable valving may be utilized to control the flow from the accumulator to the fluid amplifier.
  • Fluid from the compressor is fed to the accumulator through line 20 and is directed to the fluid amplifier through piping 22 which is helically wound so as to reject the heat picked up as a result of compression.
  • a flexible cable 24 may be utilized to interconnect line 20 to the fluid amplifier affording freedom of movement of the mouthpiece.
  • a bleed line 26 is tapped into line 20 at the discharge end of the compressor for supplying a pressurized fluid to nebulizer 16.
  • the unit may also contain a visual pressure gauge of any suitable type generally indicated by numeral 28 which is connected to fluid amplifier 12 in such a way as to allow the patient to visually inspect the pressure of the fluid entering into the mouthpiece '14.
  • a visual pressure gauge of any suitable type generally indicated by numeral 28 which is connected to fluid amplifier 12 in such a way as to allow the patient to visually inspect the pressure of the fluid entering into the mouthpiece '14.
  • mouthpiece 14 is detachable from the unit so that a suitable face mask may be utilized in its place.
  • the compressor and accumulator and cooling coils are encapsulated in a suitable housing 30 which, in turn, is mounted in a portable suitcase generally indicated by numeral 32. This, of course, illustrates the simplicity of the unit while also pointing out that such a unit is portable.
  • the fluid amplifier may be formed into two plates which may be made from suitable plastic material.
  • the cover plate 36 may be secured by any suitable well-known means to overlie the top surface of plate 38.
  • Fluid from the compressor 10 is admitted to the power nozzle 40 through line 24. From there the flow enters the inner chamber 42 of fluid amplifier 12 where it can be directed to either the channel 44 formed on the left of splitter 46 or channel 48 formed on the right side of splitter 46.
  • the flow passing through channel 48 is eventually directed to the mouthpiece and for the purposes of this description will be hereinafter referred to as the inhalation channel.
  • Channel 50 communicating at the upper end of channel 48 senses the pressure therein which is obviously at the same value as the pressure in the mouthpiece, where it is directed to discharge in the main stream of the inner chamber adjacent the power jet and serves to create a pressure differential thereacross.
  • This is known in the art as the control channel and it may be located so that the flow from the control channel will be 90 relative to the flow in the inner chamber.
  • An enlarged chamber 44 is formed in the upper portion thereof and is adapted to communicate with bleed valve 52 secured in position in a recess 54 formed in the top plate.
  • a plurality of holes 56 formed in the top cover of bleed valve 52 bleed air to ambient at a given back pressure level.
  • diode valve 58 judiciously located adjacent the inhalation channel is mounted in the top plate and contains an opening located at the bottom end thereof which is in communication with the opening 60 adjacent the inhalation channel. A portion of the flow in the inhalation channel, therefore, will pass through opening 60 into chamber 62 into the inner cylindrical opening in fluid diode 58, pass through the leg portion 64 of diode 58 and then out to ambient through the opening formed on the top of leg portion 64.
  • the fluid diode is substantially an enclosed cylinder having a leg depending tangential to the outer Wall.
  • the diode is enclosed by a suitable wall 66 defining a cylindrical cavity 68 and a rectangular cavity 70.
  • Opening 72 formed on the bottom wall communicates with the inner cylindrical cavity 68 which cavity in turn communicates with cavity 70 from where flow is directed to ambient through opening 74.
  • fluid in the fluid diode valve flows in both directions, namely, into opening 74 through cavities 70 and 68 and then out through opening 72 and vice versa.
  • flow valve 76 inserted through opening 78 formed on the top plate contains a portion 80 partially circular in cross section which projects into recess 82 formed adjacent the inhalation channel 48.
  • R0- tation of 76 serves to vary the area of the inhalation channel just upstream of the mouthpiece.
  • Flow valve 76 working in conjunction with fluid diode 64 allows the patient to adjust the flow from say 50 liters per minute (l./m.)
  • the flow adjacent the edge of the splitter 46 entering channel 42 effectively induces fluid out of channel 48 and the flow in channel 83 likewise induces fluid out of channel 48 through channel 84, having the overall effect of inducing the flow at a quick and fast rate out of the lungs While the patient is exhaling without the necessity of providing a movable type of exhalation valve.
  • pressure in chamber 44 is fed to control port 87 via feedback channel 86 and when it reaches a predetermined value, an unbalance of force across the main stream is created causing the stream to switch back to the inhalation channel.
  • control feedback channels 50 and 86 effectively change the pressure differential across the main stream causing the stream to .switch from the inhalation to the exhalation cycle and vice versa.
  • the rate of change of the inhalation to exhalation ratio (HE) is controlled by the proper sizing of openings 56 and the setting of the manual adjustable valve 88 which is rotatably supported in opening 90 formed in the cover plate 36 and the registering recess 92 formed in the bottom plate 38.
  • the slot 94 of valve stem 88 cooperates with feedback channel 86 to meter the flow to control port 87 and the rate of flow therethrough adjusts the l/E ratio. Adjustment of valve 88 also controls the sensitivity from a positive pressure level to a negative pressure level.
  • the unit can be utilized as an assist or control type of respirator and including the intermittent positive pressure breathing apparatus. That is to say, by changing the setting of valve 88, the pressure in the mouthpiece can be adjusted to a peak pressure and any intermediate pressure for a given I/E cycle.
  • the pressure in the mouthpiece will range between and 30 centimeters of water.
  • the pressure in the mouthpiece will normally range between 0 and 30 centimeters of water.
  • feedback Channel 86 is provided and connected to ambient for the purpose of controlling the sensitivity of the fluid amplifier.
  • a manually adjustable valve 96 similar to valve 88, is inserted into recess 98 adjacent the line 100 for controlling the sensitivity of the fluid amplifier. Valve 96 can be adjusted to create a negative pressure in the face mask if so desired.
  • Valve 102 similar to valve 88, fits into recess 104 adjacent feedback line 50 for adjusting the flow to control port 51. Proper balancing of the settings of valves 96 and 102 will assure a smooth and gradual transition in the switching from the inhalation to exhalation and exhalation back to inhalation cycles.
  • Both feedback channels 105 and 106 communicate with the main flow in the inner chamber at a point approximately in line with the edge of splitter 46 so as to bias the control ports 87 and 51.
  • Channel 108 communicates with the pressure in the inhalation channel and connects with gauge 28 via conduit 106.
  • the flow control valve 76 when ,the flow control valve 76 is set for minimum flow, it is possible that the switching will occur prematurely. This premature switching may be prevented by incorporating a fluid diode 58 similar to, but having lower flow characteristics than, fluid diode 58. This fluid diode will serve to decouple the main stream just downstream of valve 76 from the stream upstream of valve 76 during the exhalation cycle.
  • channels 48 and 83 are wider at the point just downstream of the passage 84.
  • Walls 48' and 83 are stepped inwardly relative to the channels so that when the main stream is flowing through the respective channels 48 and 83 a negative pressure region will be created adjacent the recessed walls. This effectively induces flow from one channel to the other to increase the volume of flow to the lungs in the inhalation cycle and increase the volume of flow discharging out of the lungs in the exhalation cycle.
  • flow passing through channel 48 adjacent wall 48 creates a low pressure region which creates a pressure drop across the ends of channel 84.
  • flow will be induced from ambient via bleed valve 52 and channel 83.
  • a respiratory unit as the one described above has proven to be eflicacious with the following dimensions of the fluid amplifier. It is to be understood, however, that the example below is included herein for illustration purposes and is not to be construed as limiting the scope of the invention.
  • the unit described above has not only been successfully employed to sustain respiration in open-chest surgery of dogs, it has also been successfully used by human patients afflicted with emphysema.
  • Breathing apparatus of the type that controls or assists in the respiratory cycle comprising a source of fluid under pressure, a mounthpiece, a pure fluid amplifier, conduit means interconnecting said mouthpiece, pure fluid amplifier and said source of fluid, said fluid amplifier including a body member having a power nozzle and inner action region adapted to inject fluid into one or the other legs of V-shaped passages formed in said body, one of the legs of the V-shaped passages communicating with said mouthpiece, the improvement comprising: fluid decoupling means including a fluid diode disposed in said one leg at a point intermediate the inner action region and mouthpiece for decoupling the load at the mouthpiece and the inner action region.
  • Breathing apparatus of the type that controls or assists in the respiratory cycle comprising a source of fluid under pressure, a mouthpiece, a pure fluid amplifier, conduit means interconnecting said mouthpiece, pure fluid amplifier and said source of fluid, said fluid amplifier including a body member having a power nozzle adapted to inject fluid into one or the other legs of V-shaped passages formed in said 'body, one of the legs of the V-shaped passages communicating with said mouthpiece, the improvement comprising: means associated with said one leg for controlling the flow in said one leg independently of the pressure in said mouthpiece.
  • Breathing apparatus of the .type that controls or assists in the respiratory cycle comprising a source of fluid under pressure, a mouthpiece, a pure fluid amplifier, conduit means interconnecting said mouthpiece, pure fluid amplifier and said source of fluid, said fluid amplifier including a body member having a power nozzle and inner action region adapted to inject fluid into one or the other legs of V-shaped passages formed in said body, one of the legs of the V-shaped passages communicating with said mouthpiece the improvement comprising: a pair of fluid diode valves serially disposed in said one leg between the inner action region and the mouthpiece for decoupling the load at the mouthpiece and the inner action region.
  • Breathing apparatus of the type that controls or assists in the respiratory cycle comprising a source of fluid under pressure, a mouthpiece, a pure fluid amplifier, conduit means interconnecting said mouthpiece, pure fluid amplifier and said source of fluid, said fluid amplifier including a body member having a power nozzle, an inner action region and a pair of V-shaped pasages extending from said inner action region, one of the legs of the V-shaped passages communicating with said mouthpiece, a control port disposed angularly relative to said power nozzle interconnecting said mouthpiece and said inner action region for switching the fluid egressing from the power nozzle to one or the other legs of said V-shaped passages, the improvement comprising: means associated with one of said legs for controlling the flow in said one leg independently of the pressure in said mouthpiece, said means including a valve in said one leg adapted to regulate the flow therethrough and a fluid diode valve communicating with ambient adapted to bleed fluid out of said one leg at a faster rate than leaking air into said one leg.
  • Breathing apparatus of the type that controls or assists in the respiratory cycle comprising a source of fluid under pressure, a mouthpiece, a pure fluid amplifier, conduit means interconnecting said mouthpiece, pure fluid amplifier and said source of fluid, said fluid amplifierv including a body member having a power nozzle, an inner action region and a pair of V-shaped passages extending from said inner action region, one of the legs of the V-shaped passages communicating with said mouthpiece, a control port disposed angularly relative to said power nozzle interconnecting said mouthpiece and said inneraction region for switching the fluid egressing from the power nozzle to one or the other legs of said V-shaped passages, the improvement comprising: means associated with one of said legs for controlling the switching pressure level in the mouthpiece without changing the flow in said leg for a given pressure level in the mouthpiece, said means including adjustable mean adapted to regulate the flow through said control port and a fluid diode valve communicating with ambient adapted to bleed fluid out of said one leg at a faster rate than leaking air into said one leg.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Pulmonology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Emergency Medicine (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
  • Engineering & Computer Science (AREA)
  • Animal Behavior & Ethology (AREA)
  • Anesthesiology (AREA)
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  • Veterinary Medicine (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)
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US3435822D 1965-06-29 1965-06-29 Breathing apparatus with fluid diode valve Expired - Lifetime US3435822A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US46784265A 1965-06-29 1965-06-29
US467838A US3379194A (en) 1965-06-29 1965-06-29 Fluid amplifier controlled respirator

Publications (1)

Publication Number Publication Date
US3435822A true US3435822A (en) 1969-04-01

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US3435822D Expired - Lifetime US3435822A (en) 1965-06-29 1965-06-29 Breathing apparatus with fluid diode valve

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US (1) US3435822A (cs)
DE (1) DE1491849B1 (cs)
GB (1) GB1095299A (cs)
SE (1) SE321767B (cs)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3494357A (en) * 1968-02-05 1970-02-10 Sperry Rand Corp Fluidic respirator
US3515135A (en) * 1968-05-22 1970-06-02 Henry C Flower Portable resuscitator unit
US3586021A (en) * 1968-11-26 1971-06-22 Bowles Fluidics Corp Fluidic breathing assistor
US3976065A (en) * 1975-03-10 1976-08-24 Gerald Durkan Digital fluidic ventilator
US4080103A (en) * 1977-01-12 1978-03-21 Bird F M Portable air compressor system for respirator
US4817863A (en) * 1987-09-10 1989-04-04 Honeywell Limited-Honeywell Limitee Vortex valve flow controller in VAV systems
US5823186A (en) * 1996-06-20 1998-10-20 Dragerwerk Ag Respirator
RU2765776C1 (ru) * 2021-02-17 2022-02-02 Федеральное государственное бюджетное учреждение науки Институт проблем управления им. В.А. Трапезникова Российской академии наук Струйный аппарат искусственной вентиляции легких

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4186737A (en) * 1977-11-10 1980-02-05 Airco, Inc. Drug nebulizing system for medical ventilators of the volume-limited type

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Publication number Priority date Publication date Assignee Title
US3030979A (en) * 1960-11-16 1962-04-24 Honeywell Regulator Co Induction fluid amplifier
US3068856A (en) * 1958-02-14 1962-12-18 Forrest M Bird Fluid control device
US3198214A (en) * 1962-10-30 1965-08-03 R I V Anstalt Zur Verwaltung V Fluid regulator
US3244189A (en) * 1963-10-04 1966-04-05 Feedback Systems Inc Fluid valve device
US3280832A (en) * 1963-11-18 1966-10-25 Retec Inc Cycling valve
US3292623A (en) * 1964-02-24 1966-12-20 Raymond W Warren Respirator
US3368555A (en) * 1965-12-02 1968-02-13 Puritan Compressed Gas Corp Respiration apparatus with fluid amplifier
US3379194A (en) * 1965-06-29 1968-04-23 United Aircraft Corp Fluid amplifier controlled respirator
US3389698A (en) * 1964-08-05 1968-06-25 Bertin & Cie Fluidic device for alternately filling and emptying an enclosure

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB709848A (en) * 1952-02-14 1954-06-02 Bain Laughlin Mckinnon Nebulizer for administering medicaments
US3122165A (en) * 1960-09-19 1964-02-25 Billy M Horton Fluid-operated system

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3068856A (en) * 1958-02-14 1962-12-18 Forrest M Bird Fluid control device
US3030979A (en) * 1960-11-16 1962-04-24 Honeywell Regulator Co Induction fluid amplifier
US3198214A (en) * 1962-10-30 1965-08-03 R I V Anstalt Zur Verwaltung V Fluid regulator
US3244189A (en) * 1963-10-04 1966-04-05 Feedback Systems Inc Fluid valve device
US3280832A (en) * 1963-11-18 1966-10-25 Retec Inc Cycling valve
US3292623A (en) * 1964-02-24 1966-12-20 Raymond W Warren Respirator
US3389698A (en) * 1964-08-05 1968-06-25 Bertin & Cie Fluidic device for alternately filling and emptying an enclosure
US3379194A (en) * 1965-06-29 1968-04-23 United Aircraft Corp Fluid amplifier controlled respirator
US3368555A (en) * 1965-12-02 1968-02-13 Puritan Compressed Gas Corp Respiration apparatus with fluid amplifier

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3494357A (en) * 1968-02-05 1970-02-10 Sperry Rand Corp Fluidic respirator
US3515135A (en) * 1968-05-22 1970-06-02 Henry C Flower Portable resuscitator unit
US3586021A (en) * 1968-11-26 1971-06-22 Bowles Fluidics Corp Fluidic breathing assistor
US3976065A (en) * 1975-03-10 1976-08-24 Gerald Durkan Digital fluidic ventilator
US4080103A (en) * 1977-01-12 1978-03-21 Bird F M Portable air compressor system for respirator
US4817863A (en) * 1987-09-10 1989-04-04 Honeywell Limited-Honeywell Limitee Vortex valve flow controller in VAV systems
US5823186A (en) * 1996-06-20 1998-10-20 Dragerwerk Ag Respirator
RU2765776C1 (ru) * 2021-02-17 2022-02-02 Федеральное государственное бюджетное учреждение науки Институт проблем управления им. В.А. Трапезникова Российской академии наук Струйный аппарат искусственной вентиляции легких

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GB1095299A (en) 1967-12-13
SE321767B (cs) 1970-03-16
DE1491849B1 (de) 1970-09-03

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