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GB1228481A - - Google Patents

Info

Publication number
GB1228481A
GB1228481A GB1228481DA GB1228481A GB 1228481 A GB1228481 A GB 1228481A GB 1228481D A GB1228481D A GB 1228481DA GB 1228481 A GB1228481 A GB 1228481A
Authority
GB
United Kingdom
Prior art keywords
duct
nozzle
chamber
diaphragm
air
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
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 filed Critical
Publication of GB1228481A publication Critical patent/GB1228481A/en
Expired legal-status Critical Current

Links

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

Landscapes

  • Health & Medical Sciences (AREA)
  • Pulmonology (AREA)
  • General Health & Medical Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)

Abstract

1,228,481. Respiratory appliances. NORMALAIR-GARRETT Ltd. 14 March, 1969 [1 April, 1968], No. 15515/68. Heading A5T. An oxygen-air diluter 10, including a diaphragm-controlled demand valve 12 with an injecter nozzle 15, has a constricted duct 23 connecting a chamber 20 surrounding an extension 19 of the nozzle 15 into a chamber 18 on the upstream side thereof to a pressure sensing chamber 11, in which is exposed one side of said diaphragm and which is connected to outlet duct 13 via a suction duct 22. The constriction of 24 of the duct 23 may be an adjustable bleed screw. An axially movable mixing tube 21 operated by a rack and pinion 40 is disposed in duct 13, which may be used to shut off the air flow through the inlet 14. A spring 16 urges nozzle 15 to seat against an annular projection extending from the wall of duct 13. The air inlet 14 may be closed barostatically by a member 39, at a predetermined altitude.
GB1228481D 1968-04-01 1968-04-01 Expired GB1228481A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1551568 1968-04-01

Publications (1)

Publication Number Publication Date
GB1228481A true GB1228481A (en) 1971-04-15

Family

ID=10060490

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1228481D Expired GB1228481A (en) 1968-04-01 1968-04-01

Country Status (1)

Country Link
GB (1) GB1228481A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4089342A (en) * 1974-08-09 1978-05-16 Giuseppe Stradella Dispensing device for respiration apparatus having one or more floating valves operating according to an improved system with pivots free from mechanical connections
US4274404A (en) * 1979-04-13 1981-06-23 American Safety Flight Systems, Inc. Oxygen supply system controlled by user exhalation

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4089342A (en) * 1974-08-09 1978-05-16 Giuseppe Stradella Dispensing device for respiration apparatus having one or more floating valves operating according to an improved system with pivots free from mechanical connections
US4274404A (en) * 1979-04-13 1981-06-23 American Safety Flight Systems, Inc. Oxygen supply system controlled by user exhalation

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee