US3366133A - Arrangement in breathing apparatus - Google Patents

Arrangement in breathing apparatus Download PDF

Info

Publication number
US3366133A
US3366133A US414616A US41461664A US3366133A US 3366133 A US3366133 A US 3366133A US 414616 A US414616 A US 414616A US 41461664 A US41461664 A US 41461664A US 3366133 A US3366133 A US 3366133A
Authority
US
United States
Prior art keywords
tube
reservoir
medium
valve
supply
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
US414616A
Inventor
Johannisson Dag Olof Alfred
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.)
Siemens AG
Original Assignee
AGA AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by AGA AB filed Critical AGA AB
Application granted granted Critical
Publication of US3366133A publication Critical patent/US3366133A/en
Assigned to SIEMENS A.G., VBA PA PB, POSTFACH 22 0261, D-8000 MUNICH 22, reassignment SIEMENS A.G., VBA PA PB, POSTFACH 22 0261, D-8000 MUNICH 22, ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: AGA AKTIEBOLAG,
Assigned to SIEMENS A.G. reassignment SIEMENS A.G. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: AGA AKTIEBOLAG
Assigned to AGA AKTIEBOLAG reassignment AGA AKTIEBOLAG RERECORD OF INSTRUMENT RECORDED APRIL 19 83 REEL 417 REAMES 218 TO CORRECT ADDRESS OF ASSIGNEE IN A PREVIOUSLY RECORDED ASSIGMENT Assignors: AGA AKTIEBOLAG
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/10—Preparation of respiratory gases or vapours
    • A61M16/104—Preparation of respiratory gases or vapours specially adapted for anaesthetics
    • 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. mouth-to-mouth respiration; Tracheal tubes
    • 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
    • Y10T137/8593—Systems
    • Y10T137/86381—Head-establishing standpipe or expansion chamber [e.g., surge tanks]

Definitions

  • a supply tube is connected at one end to a valve for controlling the flow of gas to and from a point of use and at its other end to a self-expanding bag. Intermediate its ends the supply tube is connected to a branch tube for introduction of a supply medium at the end thereof remote from the supply tube.
  • An elongated path reservoir is in communication at one of its ends to the branch tube in the vicinity of the connection of the latter with the supply medium, and the reservoir is in communication at its other end with atmosphere.
  • This invention relates to breathing apparatus of the type which may be used for narcosis, artificial respiration, etc.; and more particularly it relates to such an apparatus with a reservoir for temporarily storing surplus supplementary medium.
  • a supplementary medium which may be oxygen, or, in narcosis apparatus, a narcotic medium.
  • a supplementary medium which may be oxygen, or, in narcosis apparatus, a narcotic medium.
  • the medium is delivered to the apparatus only during the inhalation phase; during the exhalation phase, the medium flows out into the surrounding air and is lost. This leads to an uncertainty with regard to the amount of supplementary medium supplied to the breathing organs of the patient.
  • U.S. Patent 3,200,8178 for supplying a supplementary medium is provided with a closed reservoir connected to it, such as a rubber bag.
  • a closed reservoir connected to it, such as a rubber bag.
  • a safety valve which opens and lets out the excess supplementary medium. If artificial respiration is performed by compressed of the rubber bag, the safety valve must first be closed. If the amount of gas supplied according to the dosage is insufficient, an inhalation valve must also be provided, so that the patient is not deprived of breathing gas.
  • a purpose of the present invention is to provide a breathing apparatus which overcomes the disadvantages of previous breathing apparatus known heretofore and 3,3h6,l33 Patented Jan. 30, 1968 which prevents loss and assures uniform flow of the supplementary medium.
  • a breathing apparatus having a supply tube connected at one end to a valve for controlling flow of fluid to and from the point of use and having a self-expanding bag at its other end. Intermediate its ends the supply tube is connected to a branch tube for introducing the supplementary medium.
  • the branch tube has at one end a means for introducing the supplementary medium, and the device further includes an elongated-type reservoir having openings at both ends, one of the openings being connected to the branch tube in the vicinity of the latter adjacent to the means for introducing the supplementary medium, and the other opening of the reservoir being connected to atmosphere.
  • FIGURE 1 illustrates a first embodiment of the present invention.
  • FIGURE 2' illustrates a modification of the apparatus shown in FIGURE 1.
  • FIG. 1 shows a breathing apparatus during the inhalation phase.
  • a valve chamber 19 is provided with a connecting tube 11 adapted for connection to the breathing organs of the patient and with an exhalation tube 12 as well as a supply tube 13.
  • a valve disc 14 which, in the inhalation position shown, rests on a seat formed by the portion of the exhalation tube 12 extending into the chamber.
  • the tube 13 is continued by a flexible tube 15 leading to a bag 16.
  • the latter may be of the self-expanding type and may be used for artificial respiration if the patient does not breathe spontaneously.
  • a flexible tube 20 leads from the branch tube 17 through a vaporizer 21 for ether or some other narcotic to an angular tube 22, which has, in the portion thereof proximate to branch 17, a connecting means for connecting a source of supplementary medium (such as oxygen or the like) to the branch tube in the form of a supply aperture 23.
  • the tube 22 leads to a reservoir 24, of which the tube 22 forms part.
  • the reservoir 24 is subdivided by the partition 25 so as to make it have a channel-like or elongated form, which is more marked the smaller is the extension of the reservoir in the direction normal to the plane of the figure.
  • FIG. 1 shows the inhalation position, in which the paths of flow have been indicated by arrows.
  • the valve disc 14 admits gas from the tube 13 and the non-return valve 18 is open. Gas is sucked in through the movement of the inhalation from the reservoir 24 through the vaporizer 21 and the tube 20 to the breathing organs and addition of the supplementary medium takes place through the aperture 23 as well as in the vaporizer 21 when the gas flows through it.
  • valve disc 14 moves to the right and blocks the supply tube 13 and exhalation takes place through the tube 12 and the non-return valve 19, which is now open.
  • the non-return valve 18 is closed, unless the bag 16 is partially emptied, in which case a filling up of the self-expanding bag 16 takes place. If the bag is full,
  • valve disc 14 serves as a non-return valve for the tube 13 when gas is sucked in t the bag 16. It also serves as a lock for the valve 19 when an overpressure is created in the bag 16 upon compress1on.
  • FIG. 2 shows a modified embodiment, in which the parts shown in FIG. 1 above the branch tube 17 are of the same construction and have been partly left out. The elements shown have the same reference numbers but are now shown in the exhalation position.
  • the branch tube 17 connects with a flexible tube 26 serving as a reservoir and having the same function as the reservoir 24 of FIG. 1. To this end, the tube 26 is made of sufficient length to contain a volume corresponding to an inhalation or more.
  • a supply tube 27 for a supplementary medium extends into the tube 26 and has a connecting means, for connecting a source of supplementary medium to the branch tube, in the form of a free orifice at its end closest to valve 18. The supply tube 27 extends into the proximal portion of the reservoir thus formed. The function of this arrangement corresponds with what was explained in connection with FIG. 1.
  • a breathing apparatus comprising: a connecting tube for conducting gas to and from a point of use, an exhalation tube and a supply tube, an inhalation/exhalation control valve means for controlling the flow of gas between the connecting tube and the other two said tubes, a self-expanding bag connected to said supply tube, a branch tube connected to said supply tube, a connecting means in said branch tube for connecting a source of supplementary medium to the branch tube and a reservoir formed as an elongated path provided with two end openings, one of which is connected to said branch tube at the portion of the latter nearest the said connecting means and the other one of which openings is connected with the surrounding air.
  • Apparatus as set forth in claim 6 further comprising a vaporizer for supplying some narcotic to the gas to be inhaled and said vaporizer being connected with the branch tube between the connection of the reservoir and the branch tube and the connection point of the supply tube and the branch tube.
  • Apparatus as set forth in claim 1 further comprising a vaporizer for supplying some narcotic to the gas to be inhaled and said vaporizer being connected with the branch tube between the connection of the reservoir and the branch tube and the connection point of the supply tube and the branch tube.

Landscapes

  • Health & Medical Sciences (AREA)
  • Emergency Medicine (AREA)
  • Pulmonology (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)

Description

' 1968 o. o. A. JOHANNISSON 3,
ARRANGEMENT IN BREATHING APPARATUS Filed Nov. 30, 1964 INVENTOR o2 DAG OLOF ALFRED JOHANNISSON ATTORNEY 5 United States Patent 3,366,133 ARRANGEMENT IN BREATHING APPARATUS Dag Olof Alfred Johannisson, Lidingo, Sweden, assignor to Aga Aktiebolag, Lidingo, Sweden, a corporation of Sweden Filed Nov. 30, 1964, Ser. No. 414,616 Claims priority, application Sweden, Dec. 12, 1963, 13,804/ 63 8 Claims. (Cl. 137-102) ABSTRACT OF THE DISCLOSURE Breathing device for preventing loss and providing uniform flow of a supplementary medium. A supply tube is connected at one end to a valve for controlling the flow of gas to and from a point of use and at its other end to a self-expanding bag. Intermediate its ends the supply tube is connected to a branch tube for introduction of a supply medium at the end thereof remote from the supply tube. An elongated path reservoir is in communication at one of its ends to the branch tube in the vicinity of the connection of the latter with the supply medium, and the reservoir is in communication at its other end with atmosphere.
BackgroundField of the invention This invention relates to breathing apparatus of the type which may be used for narcosis, artificial respiration, etc.; and more particularly it relates to such an apparatus with a reservoir for temporarily storing surplus supplementary medium.
Backgr0und-Descripti0n 0f the prior art In breathing apparatus of this type it may be necessary to supply a supplementary medium, which may be oxygen, or, in narcosis apparatus, a narcotic medium. In many cases, it is desirable to know with good accuracy the quantity of supplementary medium supplied to the patient. In a known device for supplying a supplementary medium, described in US. Patent No. 3,256,876, the medium is delivered to the apparatus only during the inhalation phase; during the exhalation phase, the medium flows out into the surrounding air and is lost. This leads to an uncertainty with regard to the amount of supplementary medium supplied to the breathing organs of the patient. It is also known to supply the supplementary medium to a reservoir connected to the breathing apparatus and having a volume of the same order as one inhalation. In this arrangement, however, the supplementary medium mixes comparatively rapidly with the entire quantity of air stored in the reservoir, which leads to difiiculties if it is desired to increase or decrease the dosage of the supplementary medium relatively quickly.
Another known device (U.S. Patent 3,200,818) for supplying a supplementary medium is provided with a closed reservoir connected to it, such as a rubber bag. Such a reservoir must be provided with a safety valve which opens and lets out the excess supplementary medium. If artificial respiration is performed by compressed of the rubber bag, the safety valve must first be closed. If the amount of gas supplied according to the dosage is insufficient, an inhalation valve must also be provided, so that the patient is not deprived of breathing gas.
Summary of the invention A purpose of the present invention is to provide a breathing apparatus which overcomes the disadvantages of previous breathing apparatus known heretofore and 3,3h6,l33 Patented Jan. 30, 1968 which prevents loss and assures uniform flow of the supplementary medium.
According to the present invention there is provided a breathing apparatus having a supply tube connected at one end to a valve for controlling flow of fluid to and from the point of use and having a self-expanding bag at its other end. Intermediate its ends the supply tube is connected to a branch tube for introducing the supplementary medium. The branch tube has at one end a means for introducing the supplementary medium, and the device further includes an elongated-type reservoir having openings at both ends, one of the openings being connected to the branch tube in the vicinity of the latter adjacent to the means for introducing the supplementary medium, and the other opening of the reservoir being connected to atmosphere.
Brief description of the drawings There follows a detailed description together with accompanying drawings which describe and illustrate preferred embodiments of the invention. However, it is to be understood that the invention is capable of numerous modifications and variations apparent to those skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
In the drawings:
FIGURE 1 illustrates a first embodiment of the present invention.
FIGURE 2' illustrates a modification of the apparatus shown in FIGURE 1.
FIG. 1 shows a breathing apparatus during the inhalation phase. A valve chamber 19 is provided with a connecting tube 11 adapted for connection to the breathing organs of the patient and with an exhalation tube 12 as well as a supply tube 13. Provided in the chamber 10 is a valve disc 14 which, in the inhalation position shown, rests on a seat formed by the portion of the exhalation tube 12 extending into the chamber. The tube 13 is continued by a flexible tube 15 leading to a bag 16. The latter may be of the self-expanding type and may be used for artificial respiration if the patient does not breathe spontaneously. Connected to the portion of the tube 13 proximate the valve chamber 16 is a branch tube 17, the orifice of which in the tube 13 is covered by a non-return valve 18. The orifice of the exhalation tube 12 is similarly covered by a non-return valve 19. A flexible tube 20 leads from the branch tube 17 through a vaporizer 21 for ether or some other narcotic to an angular tube 22, which has, in the portion thereof proximate to branch 17, a connecting means for connecting a source of supplementary medium (such as oxygen or the like) to the branch tube in the form of a supply aperture 23. The tube 22 leads to a reservoir 24, of which the tube 22 forms part. The reservoir 24 is subdivided by the partition 25 so as to make it have a channel-like or elongated form, which is more marked the smaller is the extension of the reservoir in the direction normal to the plane of the figure.
FIG. 1 shows the inhalation position, in which the paths of flow have been indicated by arrows. The valve disc 14 admits gas from the tube 13 and the non-return valve 18 is open. Gas is sucked in through the movement of the inhalation from the reservoir 24 through the vaporizer 21 and the tube 20 to the breathing organs and addition of the supplementary medium takes place through the aperture 23 as well as in the vaporizer 21 when the gas flows through it.
In exhalation, the valve disc 14 moves to the right and blocks the supply tube 13 and exhalation takes place through the tube 12 and the non-return valve 19, which is now open. The non-return valve 18 is closed, unless the bag 16 is partially emptied, in which case a filling up of the self-expanding bag 16 takes place. If the bag is full,
there is no flow through the tube 20 nor through the vaporizer 21 but the supplementary medium delivered through the aperture 23 now instead flows to the reservoir 24. If the volume of the latter is larger than that of an inhalation, practically no amount of supplementary medium will flow out from the reservoir 24 but the medium will remain therein.
In artificial respiration, the valve disc 14 serves as a non-return valve for the tube 13 when gas is sucked in t the bag 16. It also serves as a lock for the valve 19 when an overpressure is created in the bag 16 upon compress1on.
FIG. 2 shows a modified embodiment, in which the parts shown in FIG. 1 above the branch tube 17 are of the same construction and have been partly left out. The elements shown have the same reference numbers but are now shown in the exhalation position. The branch tube 17 connects with a flexible tube 26 serving as a reservoir and having the same function as the reservoir 24 of FIG. 1. To this end, the tube 26 is made of sufficient length to contain a volume corresponding to an inhalation or more. A supply tube 27 for a supplementary medium extends into the tube 26 and has a connecting means, for connecting a source of supplementary medium to the branch tube, in the form of a free orifice at its end closest to valve 18. The supply tube 27 extends into the proximal portion of the reservoir thus formed. The function of this arrangement corresponds with what was explained in connection with FIG. 1.
Although the invention has been described and illustrated in great detail with respect to preferred embodiments thereof, it should be apparent that the invention is capable of numerous modifications and variations ontirely within the spirit and scope of the invention as defined in the appended claims.
What is claimed is:
1. A breathing apparatus comprising: a connecting tube for conducting gas to and from a point of use, an exhalation tube and a supply tube, an inhalation/exhalation control valve means for controlling the flow of gas between the connecting tube and the other two said tubes, a self-expanding bag connected to said supply tube, a branch tube connected to said supply tube, a connecting means in said branch tube for connecting a source of supplementary medium to the branch tube and a reservoir formed as an elongated path provided with two end openings, one of which is connected to said branch tube at the portion of the latter nearest the said connecting means and the other one of which openings is connected with the surrounding air.
2. Apparatus as set forth in claim 1 wherein said reservoir is in the form of a container subdivided by partitions in the manner of a labyrinth.
3. Apparatus as set forth in claim 1 wherein said reservoir is of tubular form.
4. Apparatus as set forth in claim 1 wherein said reservoir has a volume larger than the volume of an inhalation.
5. Apparatus as set forth in claim 4 wherein said reservoir is of tubular form.
6. Apparatus as set forth in claim 4 wherein said reservoir is formed as a container subdivided by partitions in the manner of a labyrinth.
7. Apparatus as set forth in claim 6 further comprising a vaporizer for supplying some narcotic to the gas to be inhaled and said vaporizer being connected with the branch tube between the connection of the reservoir and the branch tube and the connection point of the supply tube and the branch tube.
8. Apparatus as set forth in claim 1 further comprising a vaporizer for supplying some narcotic to the gas to be inhaled and said vaporizer being connected with the branch tube between the connection of the reservoir and the branch tube and the connection point of the supply tube and the branch tube.
References Cited UNITED STATES PATENTS 3,077,191 2/1963 Stanton l28188 3,200,818 8/1965 Johannisson l28202 3,256,876 6/1966 Elam 128l88 M. CARY NELSON, Primary Examiner.
W. CLINE, Assistant Examiner.
US414616A 1963-12-12 1964-11-30 Arrangement in breathing apparatus Expired - Lifetime US3366133A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE13804/63A SE302660B (en) 1963-12-12 1963-12-12

Publications (1)

Publication Number Publication Date
US3366133A true US3366133A (en) 1968-01-30

Family

ID=20298014

Family Applications (1)

Application Number Title Priority Date Filing Date
US414616A Expired - Lifetime US3366133A (en) 1963-12-12 1964-11-30 Arrangement in breathing apparatus

Country Status (5)

Country Link
US (1) US3366133A (en)
CH (1) CH426501A (en)
DE (1) DE1233537B (en)
GB (1) GB1055540A (en)
SE (1) SE302660B (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3474784A (en) * 1966-01-19 1969-10-28 Aga Ab Breathing apparatus having an arrangement for artificial respiration
US3474785A (en) * 1966-02-15 1969-10-28 Aga Ab Intermittent positive pressure resuscitator
US3518989A (en) * 1966-02-14 1970-07-07 Henry W Seeler Valve assembly
US3796216A (en) * 1972-04-24 1974-03-12 K Schwarz Resuscitator
US3882860A (en) * 1972-04-12 1975-05-13 Frimberger Eckart Reanimation device
US4501271A (en) * 1981-10-13 1985-02-26 John William Spear Resuscitator
US4821713A (en) * 1986-07-07 1989-04-18 Jack Bauman Resuscitator
US5537998A (en) * 1987-01-14 1996-07-23 Bauman; Jack Emergency manual resuscitator with means for detecting air pressure
US20070039619A1 (en) * 2005-08-22 2007-02-22 Kohnke Ole B Manual resuscitator with oxygen tubing reservoir

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1071659A (en) * 1964-06-09 1967-06-07 Cyprane Ltd Improvements in or relating to volatile anaesthetic vaporising apparatus
SE9602415D0 (en) 1996-06-19 1996-06-19 Siemens Elema Ab Apparatus for supplying air and at least one additional gas to a living being

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3077191A (en) * 1957-05-24 1963-02-12 Philip L Stanton Anesthetizing and resuscitating apparatus
US3200818A (en) * 1961-11-17 1965-08-17 Gasaccumulator Svenska Ab Breathing apparatus
US3256876A (en) * 1962-03-06 1966-06-21 Air Shields Volume indicator for anesthesia machine system

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL290539A (en) * 1961-11-18

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3077191A (en) * 1957-05-24 1963-02-12 Philip L Stanton Anesthetizing and resuscitating apparatus
US3200818A (en) * 1961-11-17 1965-08-17 Gasaccumulator Svenska Ab Breathing apparatus
US3256876A (en) * 1962-03-06 1966-06-21 Air Shields Volume indicator for anesthesia machine system

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3474784A (en) * 1966-01-19 1969-10-28 Aga Ab Breathing apparatus having an arrangement for artificial respiration
US3518989A (en) * 1966-02-14 1970-07-07 Henry W Seeler Valve assembly
US3474785A (en) * 1966-02-15 1969-10-28 Aga Ab Intermittent positive pressure resuscitator
US3882860A (en) * 1972-04-12 1975-05-13 Frimberger Eckart Reanimation device
US3796216A (en) * 1972-04-24 1974-03-12 K Schwarz Resuscitator
US4501271A (en) * 1981-10-13 1985-02-26 John William Spear Resuscitator
US4821713A (en) * 1986-07-07 1989-04-18 Jack Bauman Resuscitator
US5537998A (en) * 1987-01-14 1996-07-23 Bauman; Jack Emergency manual resuscitator with means for detecting air pressure
US20070039619A1 (en) * 2005-08-22 2007-02-22 Kohnke Ole B Manual resuscitator with oxygen tubing reservoir

Also Published As

Publication number Publication date
CH426501A (en) 1966-12-15
DE1233537B (en) 1967-02-02
GB1055540A (en) 1967-01-18
SE302660B (en) 1968-07-29

Similar Documents

Publication Publication Date Title
US3366133A (en) Arrangement in breathing apparatus
CN101360528B (en) Ventilator adaptable for use with either a dual-limb circuit or a single-limb circuit
US4067328A (en) Lung ventilator
US4060078A (en) Ventilator and method
GB2226763A (en) Respiratory apparatus with controlled fresh gas supply
GB1140581A (en) Heart and lung resuscitator
GB1094370A (en) Improvements in or relating to respirators
US3256876A (en) Volume indicator for anesthesia machine system
US2325049A (en) Breathing apparatus
US4249528A (en) Manual respirator apparatus for use with automatic respirators
JPS6056502B2 (en) breathing apparatus
JPS6113972A (en) Anasthetic and/or artificial breathing apparatus containing gas preparing part and ventilation part moved by general machine
US4909246A (en) Respirator with multiple inspiratory strokes
JPS5946615B2 (en) breathing apparatus
US4195627A (en) Breathing apparatus with flow control
Waters Factors causing awareness during surgery
US2737176A (en) Breathing machine
US6186143B1 (en) Apparatus for supplying atmospheric air and at least one additional gas to a respirating subject
US3621842A (en) Ventilating machine
US3060927A (en) Means for administering oxygen during resuscitation
US3077191A (en) Anesthetizing and resuscitating apparatus
GB623059A (en) Improvements in or relating to apparatus for the administration of inhalent gas mixtures
US914576A (en) Respirator.
US1737575A (en) Apparatus for administering gas
GB1071659A (en) Improvements in or relating to volatile anaesthetic vaporising apparatus

Legal Events

Date Code Title Description
AS Assignment

Owner name: SIEMENS A.G., VBA PA PB, POSTFACH 22 0261, D-8000

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:AGA AKTIEBOLAG,;REEL/FRAME:004049/0019

Effective date: 19811209

AS Assignment

Owner name: SIEMENS A.G., VBA PA PB, POSTFACH 22 0261, D-8000

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST. RERECORD OF INSTRUMENT RECORDED APRIL 19, 1983, REEL 4117 FRAMES 218-219 TO CORRECT ADDRESS OF ASSIGNEES IN A PREVIOUSLY RECORDED ASSIGNMENT;ASSIGNOR:AGA AKTIEBOLAG;REEL/FRAME:004117/0218

Effective date: 19830117

AS Assignment

Owner name: AGA AKTIEBOLAG, BERLIN UND MUENCHEN, WITTELSBACHER

Free format text: RERECORD OF INSTRUMENT RECORDED APRIL 19 83 REEL 417 REAMES 218 TO CORRECT ADDRESS OF ASSIGNEE IN APREVIOUSLY RECORDED ASSIGMENT;ASSIGNOR:AGA AKTIEBOLAG;REEL/FRAME:004157/0282

Effective date: 19830117

Owner name: AGA AKTIEBOLAG, STATELESS

Free format text: RERECORD OF INSTRUMENT RECORDED APRIL 19 83 REEL 417 REAMES 218 TO CORRECT ADDRESS OF ASSIGNEE IN APREVIOUSLY RECORDED ASSIGMENT;ASSIGNOR:AGA AKTIEBOLAG;REEL/FRAME:004157/0282

Effective date: 19830117