WO1995009674A1 - A servo gas regulating valve - Google Patents

A servo gas regulating valve Download PDF

Info

Publication number
WO1995009674A1
WO1995009674A1 PCT/NO1994/000160 NO9400160W WO9509674A1 WO 1995009674 A1 WO1995009674 A1 WO 1995009674A1 NO 9400160 W NO9400160 W NO 9400160W WO 9509674 A1 WO9509674 A1 WO 9509674A1
Authority
WO
WIPO (PCT)
Prior art keywords
chamber
valve body
servo
valve
control valve
Prior art date
Application number
PCT/NO1994/000160
Other languages
English (en)
French (fr)
Inventor
Nils T. Ottestad
Original Assignee
Ottestad Breathing Systems A/S
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 Ottestad Breathing Systems A/S filed Critical Ottestad Breathing Systems A/S
Priority to US08/619,767 priority Critical patent/US5690098A/en
Priority to AU78651/94A priority patent/AU686252B2/en
Priority to JP7510737A priority patent/JPH09504854A/ja
Priority to EP94929687A priority patent/EP0722351B1/en
Priority to DE69423505T priority patent/DE69423505T2/de
Publication of WO1995009674A1 publication Critical patent/WO1995009674A1/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K39/00—Devices for relieving the pressure on the sealing faces
    • F16K39/02—Devices for relieving the pressure on the sealing faces for lift valves
    • F16K39/024—Devices for relieving the pressure on the sealing faces for lift valves using an auxiliary valve on the main valve
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63C—LAUNCHING, HAULING-OUT, OR DRY-DOCKING OF VESSELS; LIFE-SAVING IN WATER; EQUIPMENT FOR DWELLING OR WORKING UNDER WATER; MEANS FOR SALVAGING OR SEARCHING FOR UNDERWATER OBJECTS
    • B63C11/00—Equipment for dwelling or working underwater; Means for searching for underwater objects
    • B63C11/02—Divers' equipment
    • B63C11/18—Air supply
    • B63C11/22—Air supply carried by diver
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63C—LAUNCHING, HAULING-OUT, OR DRY-DOCKING OF VESSELS; LIFE-SAVING IN WATER; EQUIPMENT FOR DWELLING OR WORKING UNDER WATER; MEANS FOR SALVAGING OR SEARCHING FOR UNDERWATER OBJECTS
    • B63C11/00—Equipment for dwelling or working underwater; Means for searching for underwater objects
    • B63C11/02—Divers' equipment
    • B63C11/18—Air supply
    • B63C11/22—Air supply carried by diver
    • B63C11/2227—Second-stage regulators

Definitions

  • the invention relates to a servo gas regulating valve comprising a housing having an inlet chamber and an outlet chamber, a main valve body cooperating with a seat separating the inlet chamber from the outlet chamber, a piston or the like separating the outlet chamber from a servo chamber, and a control valve arranged to be opened and closed by the main valve body.
  • Systems for supplying breathing gas are generally based on a regulated supply from reservoirs containing gas/air under pressure. In such systems the gas flow generally is controlled so that it is in accordance with the demand, i.e. it is the question of demand systems.
  • ordinary demand valves there is commonly a direct mechanical connection between a sensor diaphragm and the valve which opens or closes the nozzle opening.
  • a gas regulating valve of the introductorily stated type which, according to the invention, is characterized in that the control valve brings about a controlled gas flow to the servo chamber, which entails that the main valve body is forced to move such that the seat of the control valve at all times rests sealingly against the valve body of the control valve.
  • the valve according to the invention does not have stability problems as a consequence of friction in sealing means, and the regulating force is very small. Further, there is a minimum time delay between the control valve and the main valve, whereby a very precise control of large gas quantities is achieved.
  • the invention used both as a demand valve and as a pressure reduction valve, has been found to be very advantageous. It is simple to produce, it is not very sensitive to pressure variations, and it has a very good capacity.
  • Fig. 1 shows a cross-section of an embodiment of a regulating valve according to the invention used on a demand valve
  • Fig. 2 shows a somewhat enlarged sectional view of the regulating valve.
  • the illustrated demand valve consists of an outer casing 7 having a sensing diaphragm 8 which, through a lever 9 and an operating means 4, influences the gas regulating valve which is fixedly mounted to the casing 7.
  • the regulating valve comprises a housing 1 having an inlet chamber I and an outlet chamber II, a hollow main valve body 2 cooperating with a seat 3 separating the inlet chamber I from the outlet chamber II, a piston 12 separating the outlet chamber II from the servo chamber III of the valve, and a control valve comprising a valve body 5 and a seat 6, and which is arranged to be opened and closed by the main valve body 2.
  • the seat 6 of the control valve is arranged in a channel 15 extending axially through the main valve body 2 and connecting the inlet chamber I with the servo chamber III, and the control valve body 5 is connected to the operating means 4 of the demand valve through said channel.
  • the control valve regulates the gas flow between the inlet chamber and the servo chamber through the channel 15.
  • one side surface of the servo chamber III is constituted by one side surface of the piston 12 of which the other side surface faces the outlet chamber II and of which the central portion is rigidly connected to the main valve body 2.
  • the piston 12 there could have been provided a diaphragm or the like.
  • the main valve body 2 comprises a metal sleeve 11 which is pressed into a resilient sleeve 13 which constitutes the seat 6 of the control valve as well as the sealing surface between the main valve body 2 and the seat 3 of the main valve.
  • the metal sleeve 11 is provided with s barbes (not shown) and is pressed into the central part of the resilient sleeve 13.
  • the only spring which is used in the gas regulating valve is a small spring 10 which has the task to see to it that the valve body 5 of the control valve rests

Landscapes

  • Health & Medical Sciences (AREA)
  • Pulmonology (AREA)
  • Engineering & Computer Science (AREA)
  • General Health & Medical Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ocean & Marine Engineering (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Control Of Fluid Pressure (AREA)
  • Fluid-Driven Valves (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)
PCT/NO1994/000160 1993-10-05 1994-10-04 A servo gas regulating valve WO1995009674A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US08/619,767 US5690098A (en) 1993-10-05 1994-10-04 Servo gas regulating valve
AU78651/94A AU686252B2 (en) 1993-10-05 1994-10-04 A servo gas regulating valve
JP7510737A JPH09504854A (ja) 1993-10-05 1994-10-04 サーボ式ガス調節弁
EP94929687A EP0722351B1 (en) 1993-10-05 1994-10-04 A servo gas regulating valve
DE69423505T DE69423505T2 (de) 1993-10-05 1994-10-04 Gasregulierungs-servoventil

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO933551A NO178121C (no) 1993-10-05 1993-10-05 Servo gassreguleringsventil
NO933551 1993-10-05

Publications (1)

Publication Number Publication Date
WO1995009674A1 true WO1995009674A1 (en) 1995-04-13

Family

ID=19896481

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NO1994/000160 WO1995009674A1 (en) 1993-10-05 1994-10-04 A servo gas regulating valve

Country Status (7)

Country Link
US (1) US5690098A (no)
EP (1) EP0722351B1 (no)
JP (1) JPH09504854A (no)
AU (1) AU686252B2 (no)
DE (1) DE69423505T2 (no)
NO (1) NO178121C (no)
WO (1) WO1995009674A1 (no)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0509369D0 (en) * 2005-05-07 2005-06-15 Foss Nicholas J A breathing apparatus demand valve
US20090065007A1 (en) 2007-09-06 2009-03-12 Wilkinson William R Oxygen concentrator apparatus and method
JP5528899B2 (ja) 2010-04-28 2014-06-25 興研株式会社 供給弁
US20120055483A1 (en) * 2010-09-07 2012-03-08 Wilkinson William R Shutdown system and method for an oxygen concentrator
BR112015008210A2 (pt) 2012-10-12 2017-07-04 Inova Labs Inc métodos e sistemas de concentrador de oxigênio dual.
EP2906278B1 (en) 2012-10-12 2019-01-30 Inova Labs, Inc. Systems for the delivery of oxygen enriched gas
AU2013328916A1 (en) 2012-10-12 2015-05-14 Inova Labs, Inc. Oxygen concentrator systems and methods
US9440179B2 (en) 2014-02-14 2016-09-13 InovaLabs, LLC Oxygen concentrator pump systems and methods
US11458274B2 (en) 2016-05-03 2022-10-04 Inova Labs, Inc. Method and systems for the delivery of oxygen enriched gas

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2285155A1 (fr) * 1974-09-23 1976-04-16 Christianson Raymond Regulateur agissant en fonction de la demande de gaz respirable actionne par clapet-pilote pour appareil de respiration
NO151447B (no) * 1981-08-28 1985-01-02 Nils T Ottestad Balansert gassregulatorventil.
DE4040793A1 (de) * 1990-12-15 1992-06-17 Ulrich Gumpert Elektronisch geregelter lungenautomat

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US591013A (en) * 1897-10-05 Safety-valve
US873324A (en) * 1907-03-04 1907-12-10 August Michaels Automatic valve.
US2925824A (en) * 1952-12-15 1960-02-23 Edward A Rockwell Fluid control valve
US3945393A (en) * 1972-02-29 1976-03-23 Giuseppe Teatini Regulating valve
IT211686Z2 (it) * 1987-01-28 1989-04-07 Amf Mares Spa Dispositivo regolare di pressione per il secondo stadio di riduzione degli apparecchi respiratori ad aria

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2285155A1 (fr) * 1974-09-23 1976-04-16 Christianson Raymond Regulateur agissant en fonction de la demande de gaz respirable actionne par clapet-pilote pour appareil de respiration
NO151447B (no) * 1981-08-28 1985-01-02 Nils T Ottestad Balansert gassregulatorventil.
DE4040793A1 (de) * 1990-12-15 1992-06-17 Ulrich Gumpert Elektronisch geregelter lungenautomat

Also Published As

Publication number Publication date
NO933551L (no) 1995-04-06
NO178121B (no) 1995-10-16
EP0722351B1 (en) 2000-03-15
DE69423505T2 (de) 2000-06-29
AU686252B2 (en) 1998-02-05
US5690098A (en) 1997-11-25
NO933551D0 (no) 1993-10-05
DE69423505D1 (de) 2000-04-20
NO178121C (no) 1996-01-24
AU7865194A (en) 1995-05-01
JPH09504854A (ja) 1997-05-13
EP0722351A1 (en) 1996-07-24

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