GB2014047A - Demand inhalation valve system - Google Patents

Demand inhalation valve system

Info

Publication number
GB2014047A
GB2014047A GB7903326A GB7903326A GB2014047A GB 2014047 A GB2014047 A GB 2014047A GB 7903326 A GB7903326 A GB 7903326A GB 7903326 A GB7903326 A GB 7903326A GB 2014047 A GB2014047 A GB 2014047A
Authority
GB
United Kingdom
Prior art keywords
piston
diaphragm
outlet
gas
inhalation
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.)
Granted
Application number
GB7903326A
Other versions
GB2014047B (en
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB2014047A publication Critical patent/GB2014047A/en
Application granted granted Critical
Publication of GB2014047B publication Critical patent/GB2014047B/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

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

A valve body (28) defines a chamber (65) having an inlet (72) connected to a gas supply and an outlet (29) connected to a face mask. The valve body supports a flexible diaphragm (40) connected by an adjustable lever mechanism (59, 118, 110) to a piston (95) so that the diaphragm opens the piston in response to a predetermined differential pressure across the diaphragm produced by inhalation and respiratory gas flows into the outlet (29) through a radially extending passage (92). The valve construction is such that the piston opens further in response to a suction force produced by the flow of gas past the piston and independent of the diaphragm actuation to provide for minimizing the inhalation effort by the individual regardless of the volume of gas demanded during inhalation. This is achieved by providing an axial passage (102) in the piston and also by a Venturi effect produced when gas flows through a curved section of the outlet (29). <IMAGE>
GB7903326A 1978-02-13 1979-01-31 Demand inhalation valve system Expired GB2014047B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US87700478A 1978-02-13 1978-02-13

Publications (2)

Publication Number Publication Date
GB2014047A true GB2014047A (en) 1979-08-22
GB2014047B GB2014047B (en) 1982-10-27

Family

ID=25369057

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7903326A Expired GB2014047B (en) 1978-02-13 1979-01-31 Demand inhalation valve system

Country Status (5)

Country Link
JP (1) JPS54115597A (en)
CA (1) CA1120372A (en)
DE (1) DE2905401A1 (en)
FR (1) FR2416695A1 (en)
GB (1) GB2014047B (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2182248A (en) * 1985-10-07 1987-05-13 Gas Serv Offshore Ltd Inlet valve assembly for a demand regulator divers valve
EP0269900A1 (en) * 1986-11-12 1988-06-08 Enrico Domenico Bozano Air regulator for breathing apparatus
US5501213A (en) * 1993-09-22 1996-03-26 Racal Health & Safety Limited Gas flow control valves
US5727546A (en) * 1993-08-18 1998-03-17 Fisons Plc Powder inhaler with breath flow regulation valve
EP3322489A4 (en) * 2015-07-15 2019-03-13 MSA (Suzhou) Safety Equipment R&d Co., Ltd. Pressure regulator assembly and bypass assembly for a self-contained breathing apparatus

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8624230D0 (en) * 1986-10-09 1987-02-04 Normalair Garrett Ltd Aircrew breathing systems
CN112370674B (en) * 2020-11-05 2022-01-25 郝志勇 Positive pressure type air respirator for fire fighting

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2182248A (en) * 1985-10-07 1987-05-13 Gas Serv Offshore Ltd Inlet valve assembly for a demand regulator divers valve
GB2182248B (en) * 1985-10-07 1989-10-11 Gas Serv Offshore Ltd Inlet valve assembly for a demand regulator divers valve
EP0269900A1 (en) * 1986-11-12 1988-06-08 Enrico Domenico Bozano Air regulator for breathing apparatus
US5727546A (en) * 1993-08-18 1998-03-17 Fisons Plc Powder inhaler with breath flow regulation valve
US6109261A (en) * 1993-08-18 2000-08-29 Fisons Plc Powder inhaler with breath flow regulation valve
US5501213A (en) * 1993-09-22 1996-03-26 Racal Health & Safety Limited Gas flow control valves
EP3322489A4 (en) * 2015-07-15 2019-03-13 MSA (Suzhou) Safety Equipment R&d Co., Ltd. Pressure regulator assembly and bypass assembly for a self-contained breathing apparatus
US11298571B2 (en) 2015-07-15 2022-04-12 MSA (Suzhou) Safety Equipment R&D Co., Ltd. Pressure regulator assembly and bypass assembly for a self-contained breathing apparatus
US11497945B2 (en) 2015-07-15 2022-11-15 MSA (Suzhou) Safety Equipment R&D Co., Ltd. Pressure regulator assembly and bypass assembly for a self-contained breathing apparatus

Also Published As

Publication number Publication date
CA1120372A (en) 1982-03-23
GB2014047B (en) 1982-10-27
FR2416695A1 (en) 1979-09-07
JPS54115597A (en) 1979-09-08
DE2905401A1 (en) 1979-08-23
FR2416695B3 (en) 1981-11-27

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Legal Events

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