GB1293479A - Medical ventilator including a fail-safe system - Google Patents

Medical ventilator including a fail-safe system

Info

Publication number
GB1293479A
GB1293479A GB38980/71A GB3898071A GB1293479A GB 1293479 A GB1293479 A GB 1293479A GB 38980/71 A GB38980/71 A GB 38980/71A GB 3898071 A GB3898071 A GB 3898071A GB 1293479 A GB1293479 A GB 1293479A
Authority
GB
United Kingdom
Prior art keywords
valve
gas
solenoid
driving
energised
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
Application number
GB38980/71A
Inventor
G E Smythe
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Priority to GB38980/71A priority Critical patent/GB1293479A/en
Priority to NL7211142A priority patent/NL7211142A/xx
Priority to DE2240244A priority patent/DE2240244C3/en
Priority to JP8206972A priority patent/JPS5313919B2/ja
Priority to SE7210678A priority patent/SE374021B/xx
Priority to US00281720A priority patent/US3844280A/en
Priority to FR7229815A priority patent/FR2149582B1/fr
Publication of GB1293479A publication Critical patent/GB1293479A/en
Expired legal-status Critical Current

Links

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
    • A61M16/021—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes operated by electrical means
    • 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
    • A61M16/0057—Pumps therefor
    • A61M16/0075—Bellows-type

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)
  • Safety Valves (AREA)

Abstract

1293479 Respiratory appliances PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 19 Aug 1971 38980/71 Heading A5T In a time cycled medical ventilator, driving gas is supplied from a source DG via an energised solenoid operated valve S1, to a port 1 of a pneumatically operated driving cylinder D.C.1 thus forcing the piston downwards to contract bellows B1 and B2 and expel therefrom a volume of respiratory gas. At the same time solenoid DS1 is de-energised to allow inspiratory valve I.V. to open so allowing the respiratory gas to pass at a rate determined via a flow rate controller F.R.C. to the patient via a non-return valve N.R.V.2 and gas is vented from the non-driving chamber of the driving cylinder to atmosphere via de-energised solenoid operated valve S2. When inspiration of respiratory gas is complete the solenoid of valve S.1 is de-energised and the solenoid of valve S.2 energised, so that driving gas is fed to port 2 of the driving cylinder, and vented to atmosphere via port 1 and valve S.1, the bellows being thus expanded to draw in respiratory gas via inlet RG and non-return valve N.R.V.1. Inspiratory valve I.V. is closed by energisation of solenoid D.S.1 and expiratory valve E.V. opened by de-energisation of solenoid D.S.2. A pressure relief valve comprises a valve member V.M., a valve seat V.S., and a weight W disposed on a lever arm L.A. pivoted at P. to limit the maximum pressure in the inspiration gas passage. A detecting means is arranged to open the relief valve to allow the patient to breathe if the driving gas supply fails, and comprises a variable capacity gas reservoir G.R. which is charged with driving gas via non-return valve N.R.V. 4 or N.R.V. 5, and vented to atmosphere via flow restrictor F.R. at a rate slower than the rate at which driving gas can be fed to the reservoir, so that if the driving gas supply fails the piston rod of the reservoir rises to engage the lever arm of the relief valve and opens it, but in normal operation the piston rod never reaches this height.
GB38980/71A 1971-08-19 1971-08-19 Medical ventilator including a fail-safe system Expired GB1293479A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
GB38980/71A GB1293479A (en) 1971-08-19 1971-08-19 Medical ventilator including a fail-safe system
NL7211142A NL7211142A (en) 1971-08-19 1972-08-16
DE2240244A DE2240244C3 (en) 1971-08-19 1972-08-16 Gas pressure monitoring arrangement for a time-controlled ventilator
JP8206972A JPS5313919B2 (en) 1971-08-19 1972-08-16
SE7210678A SE374021B (en) 1971-08-19 1972-08-17
US00281720A US3844280A (en) 1971-08-19 1972-08-18 Medical ventilator including a fail-safe device
FR7229815A FR2149582B1 (en) 1971-08-19 1972-08-21

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB38980/71A GB1293479A (en) 1971-08-19 1971-08-19 Medical ventilator including a fail-safe system

Publications (1)

Publication Number Publication Date
GB1293479A true GB1293479A (en) 1972-10-18

Family

ID=10406888

Family Applications (1)

Application Number Title Priority Date Filing Date
GB38980/71A Expired GB1293479A (en) 1971-08-19 1971-08-19 Medical ventilator including a fail-safe system

Country Status (7)

Country Link
US (1) US3844280A (en)
JP (1) JPS5313919B2 (en)
DE (1) DE2240244C3 (en)
FR (1) FR2149582B1 (en)
GB (1) GB1293479A (en)
NL (1) NL7211142A (en)
SE (1) SE374021B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0281180A1 (en) * 1987-02-17 1988-09-07 Physio Bv Respirating apparatus for patients

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61223195A (en) * 1984-08-14 1986-10-03 Touhei Mekki:Kk Painting method for plated material
JPS6163961U (en) * 1984-10-03 1986-05-01
US4883051A (en) * 1988-02-18 1989-11-28 Summa Vest, Inc. Disposable breathing system and components
DE3820165A1 (en) * 1988-06-14 1989-12-21 Draegerwerk Ag VENTILATOR WITH INSPIRATIONAL MULTIPLE LIFTS
US5596984A (en) * 1994-09-12 1997-01-28 Puritan-Bennett Corporation Lung ventilator safety circuit
FI105162B (en) * 1997-02-06 2000-06-30 Instrumentarium Oy Ventilation ventilator and valve connected to the patient duct of the ventilator
SE514365C2 (en) 1999-06-03 2001-02-12 Aneo Ab Arrangement for pulmonary ventilatory therapy
SE9902180D0 (en) 1999-06-10 1999-06-10 Siemens Elema Ab Apparatus for the supply of a breathing gas
CN102380150B (en) * 2011-09-28 2014-07-30 于邦仲 Pneumatic gas-controlled breathing machine
CN104399164A (en) * 2014-12-01 2015-03-11 北京神鹿腾飞医疗科技有限公司 Intelligent respirator and aerating method of using the respirator
CN116782972A (en) * 2020-12-31 2023-09-19 深圳迈瑞动物医疗科技股份有限公司 Breathing ventilation method, device, anesthesia machine and computer readable storage medium

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB914343A (en) * 1959-02-06 1963-01-02 Pye Ltd Electronic time cycled respirator
US3307542A (en) * 1963-02-05 1967-03-07 Air Shields Lung ventilating equipment
GB1062772A (en) * 1963-03-20 1967-03-22 Geoffrey Barnett Burchell A respiratory apparatus
GB1162151A (en) * 1966-02-24 1969-08-20 Watson W & Sons Ltd Improvements in or relating to Medical Respirators

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0281180A1 (en) * 1987-02-17 1988-09-07 Physio Bv Respirating apparatus for patients

Also Published As

Publication number Publication date
DE2240244A1 (en) 1973-03-01
NL7211142A (en) 1973-02-21
US3844280A (en) 1974-10-29
SE374021B (en) 1975-02-24
FR2149582A1 (en) 1973-03-30
JPS4829296A (en) 1973-04-18
DE2240244C3 (en) 1980-07-10
FR2149582B1 (en) 1977-08-26
JPS5313919B2 (en) 1978-05-13
DE2240244B2 (en) 1979-10-31

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee