GB971953A - Improvements in or relating to respirator machines - Google Patents

Improvements in or relating to respirator machines

Info

Publication number
GB971953A
GB971953A GB23218/62A GB2321862A GB971953A GB 971953 A GB971953 A GB 971953A GB 23218/62 A GB23218/62 A GB 23218/62A GB 2321862 A GB2321862 A GB 2321862A GB 971953 A GB971953 A GB 971953A
Authority
GB
United Kingdom
Prior art keywords
valve
bellows
passageway
exhalation
gas
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
GB23218/62A
Inventor
John Henry Blease
Roger Edward Wentworth Manley
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.)
Blease Anaesthetic Equipment Ltd
Original Assignee
Blease Anaesthetic Equipment Ltd
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 Blease Anaesthetic Equipment Ltd filed Critical Blease Anaesthetic Equipment Ltd
Priority to GB23218/62A priority Critical patent/GB971953A/en
Publication of GB971953A publication Critical patent/GB971953A/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
    • A61M16/0003—Accessories therefor, e.g. sensors, vibrators, negative pressure
    • A61M16/0009—Accessories therefor, e.g. sensors, vibrators, negative pressure with sub-atmospheric pressure, e.g. during expiration
    • 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
    • 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)

Abstract

971,953. Respiratory devices. BLEASE ANAESTHETIC EQUIPMENT Ltd. May 9, 1963 [June 15, 1962], No. 23218/62. Heading A5T. A respiratory device comprises a one-way exhaust valve 44 having its inlet in communication with an exhalation valve 42 and a passageway 46 through which gas is drawn and an admittance valve 52 biased shut and able to admit air to the passageway 46 when the bias is overcome, the device being such that when gas issues through the exhalation valve 42 at a rate lower than the rate at which it is drawn through the passageway 46 the exhaust valve 44 is closed and the pressure in the passageway 46 becomes subatmospheric, the maximum value of this subatmospheric pressure being determined by the bias on the admittance valve 52. On inflation of bellows 4 (which is biased shut by compression spring 8), by compressed air entering by inlet 6, needle 10 moves away from valve seat 12 and pivoted lever 14 comes in contact with movable stop 16 which opens valve 22. As bellows 4 collapse air is forced into bellows 18 and as bellows 18 expand bellows 48 expand. At this stage inhalation valve 36 is closed and the patient exhales through exhalation valve 42. Initially the rate of exhalation is greater than the rate at which gas is being drawn into bellows 48 and exhaust valve 44 is open to the atmosphere. When the rate of gas drops below that at which it is entering bellows 48, valve 44 closes and a subatmospheric pressure builds up in passageway 46 till the valve member 52 overcomes the bias of counterweight 56 to allow air to enter passageway 46. The pressure in the passageway 46 remains constant until the exhalation period is completed which is marked by contact 30 contacting movable stop 32 to close valve 22, by the closing of exhalation valve 42 and by the opening of inhalation valve 36 to permit bellows 18 to exhaust their contents to the patient. As bellows 18 deflate bellows 48 deflate, gas in bellows 48 escapes to the atmosphere through valve 58, and bellows 4 inflate to start another cycle.
GB23218/62A 1962-06-15 1962-06-15 Improvements in or relating to respirator machines Expired GB971953A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB23218/62A GB971953A (en) 1962-06-15 1962-06-15 Improvements in or relating to respirator machines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB23218/62A GB971953A (en) 1962-06-15 1962-06-15 Improvements in or relating to respirator machines

Publications (1)

Publication Number Publication Date
GB971953A true GB971953A (en) 1964-10-07

Family

ID=10192068

Family Applications (1)

Application Number Title Priority Date Filing Date
GB23218/62A Expired GB971953A (en) 1962-06-15 1962-06-15 Improvements in or relating to respirator machines

Country Status (1)

Country Link
GB (1) GB971953A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3503393A (en) * 1966-05-19 1970-03-31 Blease Anaesthetic Equip Ltd Patient controlled respiratory apparatus
US5787880A (en) * 1993-11-10 1998-08-04 Greenfield Medical Technologies, Inc. Resuscitation device
US11464925B2 (en) 2018-06-04 2022-10-11 Trudell Medical International Positive air pressure therapy device, kit and methods for the use and assembly thereof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3503393A (en) * 1966-05-19 1970-03-31 Blease Anaesthetic Equip Ltd Patient controlled respiratory apparatus
US5787880A (en) * 1993-11-10 1998-08-04 Greenfield Medical Technologies, Inc. Resuscitation device
US11464925B2 (en) 2018-06-04 2022-10-11 Trudell Medical International Positive air pressure therapy device, kit and methods for the use and assembly thereof

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