EP0803269A2 - Dispositif de raccordement à un cylindre de gaz - Google Patents

Dispositif de raccordement à un cylindre de gaz Download PDF

Info

Publication number
EP0803269A2
EP0803269A2 EP97302545A EP97302545A EP0803269A2 EP 0803269 A2 EP0803269 A2 EP 0803269A2 EP 97302545 A EP97302545 A EP 97302545A EP 97302545 A EP97302545 A EP 97302545A EP 0803269 A2 EP0803269 A2 EP 0803269A2
Authority
EP
European Patent Office
Prior art keywords
connector member
connector
stud
housing
pins
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.)
Withdrawn
Application number
EP97302545A
Other languages
German (de)
English (en)
Other versions
EP0803269A3 (fr
Inventor
Paul Nicolas Townsend
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.)
Draeger Ltd
Original Assignee
Draeger 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 Draeger Ltd filed Critical Draeger Ltd
Publication of EP0803269A2 publication Critical patent/EP0803269A2/fr
Publication of EP0803269A3 publication Critical patent/EP0803269A3/fr
Withdrawn legal-status Critical Current

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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
    • A62B9/04—Couplings; Supporting frames

Definitions

  • This invention relates to the field of connectors for gas containers, particularly breathing gas containers for use with respiratory devices.
  • a container for breathing gas connected to a respiratory device by means of a connector which comprises a first connector member connected to one of said container and said device and a second connector member connected to the other of said container and said device, wherein said first connector member comprises a central stud through which the gas can pass and a housing surrounding the central stud, the connector including a bayonet-type latching means adapted to hold the first connector member resiliently against the second connector member.
  • first connector member for use in accordance with the first aspect of the invention which first connector member is in the form of a male connector member wherein the latching means comprises a plurality of pins equally spaced around the inner circumference of the housing and extending radially into the interior of the housing and the central stud extends into the interior of the housing between the pins.
  • the housing is preferably in the form of a handwheel and the pins are preferably located in holes in the handwheel.
  • the pins are preferably located in holes in the handwheel.
  • a sealing member is advantageously provided, typically in the form of an O-ring around the central stud, adapted to form a seal with the second connector member.
  • the central stud may have a slot around its circumference to locate the O-ring.
  • the outer surface of that end of the stud which is most remote, axially, from the end of the stud to be connected to the second connector member and the inner surface of that end of the housing adjacent to said outer surface form an axially slidable rotating bearing.
  • the stud can, if desired merely be axially slidable with respect to the housing.
  • a resilient means may be provided to urge the housing away from the end of the stud to be connected to the second member.
  • a resilient means may be provided to urge the housing away from the end of the stud to be connected to the second member.
  • the pins are adapted to engage with corresponding detent portions in the second connector member, under the action of the resilient means, to hold the second connector member in position.
  • the resilient means may be a spring in compression.
  • the male connector member is more complex than the female connector member to be connected thereto. It is therefore advantageous to attach it to the respiratory device, in particular to the pressure reducer of the respiratory device.
  • a second connector member for use in accordance with the first aspect of the invention which second connector member is in the form of a female connector member including a generally tubular part and a mounting flange provided circumferentially around an end of the tubular part, wherein the latching means comprises a plurality of gap-defining portions in the mounting flange for co-operation with the pins of the first connector member, a ramp portion adjacent to each gap and a locking detent portion adjacent to each ramp portion.
  • the female connector member has a hole provided in the centre of said end to receive the protruding central stud and to form a gas tight seal therewith.
  • the female connector member may be an adapter to be threadingly engaged with a standard cylinder valve, or it may be integrally formed with the cylinder valve.
  • the housing of the male connector member is turned until the pins of the latching means can be passed through the gaps in the mounting flange of the female connector member.
  • the housing is then further rotated until the pins engage in the locking detent portions of the female connector member.
  • a male connector member 100 has a hollow central stud 4 which is adapted to be airtightly attached at a first of its generally cylindrical ends to the pressure reducer 5 of a respiratory device (not shown).
  • the second end of the stud 4 is also generally cylindrical but has a smaller diameter.
  • a flange 14 is provided intermediate the ends.
  • a passage for air 16 is provided along the longitudinal axis of the stud.
  • a housing in the form of a handwheel 8 is provided. It has an inner surface which, together with the outer surface of said first end of the stud 4, defines an axially slidable rotatable bearing whereby the housing is rotatably and slidably mounted around said first end of the stud 4.
  • the other, second, end of the handwheel surrounds the second end of the stud and has an inner diameter which is much greater than the outer diameter of the second end of the stud thereby providing a cylindrical space 18 between the handwheel and the stud into which a hollow female connector member 110 may be introduced.
  • a sealing member in the form of an O-ring 6 is provided on the outer surface of said second end of the stud.
  • Three radially drilled holes 17 are provided in the handwheel 8 at equal spacings around its second end and three pins 9 are provided, one in each drilled hole 17.
  • the pins 9 extend into the cylindrical space 18 and form a first part of a bayonet-type latching means.
  • the pins are constituted by the forward ends of bolts screwed into recesses 17a in the handwheel surrounding the holes 17.
  • the pins could in principle be integral with the handwheel.
  • a resilient means in the form of a spring 7 is provided between the flange 14 and a corresponding shoulder 23 of the handwheel.
  • the spring 7 applies pressure to the handwheel and urges it towards said first end of the stud 4 away from the female connector member 110.
  • the female connector member 110 is also provided with a sealing member 3. It is adapted to be screwed at one end onto a screw end 25 of cylinder valve 2 of compressed air cylinder 40 having a working pressure of 300 bars. It forms a standard connection with the cylinder that is sealed in the normal manner by the sealing member 3.
  • the female connector member 110 is adapted to be connected with said second end of the stud 4 of the male connector member 100.
  • a cavity is provided that is adapted to accept the second end of the stud 4 of the male connector member 100 and form an airtight seal with the O-ring 6.
  • the end face of the female connector member 110 fits in the space 18 of the male connector member 100.
  • a mounting flange 33 is provided circumferentially around the end face of the female connector member 110 and includes portions defining three gaps 35, equally spaced around the flange 33.
  • the pins 9 can pass through these gaps which form a second part of the bayonet-type latching means.
  • Circumferentially adjacent to these gaps are provided three ramp portions 37 each starting at one of the gaps 35 and ending in a locking detent portion 39.
  • the male connector member 100 is connected to the pressure reducer 5 of the respiratory device and the female connector member 110 is screwed onto the cylinder valve 2. These operations may be performed in advance.
  • the female connector member 110 is then slid onto the male connector member 100, around the stud 4 and inside the handwheel 8. If the pins 9 and gaps 35 are not already aligned, the handwheel 8 is rotated until the three pins 9 can pass through the gaps 35 in the flange 33 so that the female connector member enters the space 18 between the pins 9. The handwheel 8 is then rotated further so that the pins 9 slide up the ramps 37, compressing the spring 7, until they finally reach the locking detent portions 39, where they lock into place.
  • the spring 7 applies pressure to keep the pins 9 locked into place. Once the cylinder valve 2 is opened, moreover, the air pressure increases the locking force.
  • the unit is depressurised to remove the locking force of the air pressure.
  • the hand wheel 8 is then pushed against the action of the spring 7 towards the female connector member 110.
  • the hand wheel 8 is then rotated in the opposite direction to that used during mounting until the pins 9 pass through the gaps 35 and the female connector member 110 is then pulled away from the hand wheel 8.
  • the cylinder valve 2 has the female connector member 110 integrally incorporated within it, a separate female connector member then not being required.
  • the stud 4 of a first connector member for use with a low pressure (200 bar) gas container is longer than the stud 4 of a first connector member for use with a high pressure (300 bar) container. This longer stud prevents the low pressure first connector member from being brought sufficiently close to a high pressure second connector that the pins 9 can be engaged in the detent recesses 39.
  • the male connector member is connected to the cylinder valve and the female connector member is connected to the respiratory device.
  • the resilient means may be in the female connector member rather than in the male connector member.

Landscapes

  • Health & Medical Sciences (AREA)
  • Pulmonology (AREA)
  • General Health & Medical Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Quick-Acting Or Multi-Walled Pipe Joints (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)
EP97302545A 1996-04-23 1997-04-15 Dispositif de raccordement à un cylindre de gaz Withdrawn EP0803269A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9608336 1996-04-23
GBGB9608336.5A GB9608336D0 (en) 1996-04-23 1996-04-23 Gas cylinder connection

Publications (2)

Publication Number Publication Date
EP0803269A2 true EP0803269A2 (fr) 1997-10-29
EP0803269A3 EP0803269A3 (fr) 1999-03-17

Family

ID=10792471

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97302545A Withdrawn EP0803269A3 (fr) 1996-04-23 1997-04-15 Dispositif de raccordement à un cylindre de gaz

Country Status (3)

Country Link
EP (1) EP0803269A3 (fr)
CA (1) CA2204285A1 (fr)
GB (1) GB9608336D0 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2572255A (en) * 2018-02-19 2019-09-25 Draeger Safety Ag & Co Kgaa High-pressure connector for a fluid-communicating connection of a breathing gas source of a respirator to a pressure reducer
EP4684840A1 (fr) * 2024-07-26 2026-01-28 Dräger Safety AG & Co. KGaA Raccord filete securise

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1802814C3 (de) * 1968-10-12 1975-03-27 Draegerwerk Ag, 2400 Luebeck Anschlußbauteil für Atemschutzgeräte, Atemschutzfilter, od. dgl
GB2135198B (en) * 1983-02-16 1986-07-30 Siebe Gorman & Co Ltd Facemasks for breathing apparatus
GB2289925B (en) * 1993-01-15 1996-09-18 Knight Lock Systems Ltd Coupling arrangement
GB9319580D0 (en) * 1993-09-22 1993-11-10 Racal Health & Safety Ltd Valves

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2572255A (en) * 2018-02-19 2019-09-25 Draeger Safety Ag & Co Kgaa High-pressure connector for a fluid-communicating connection of a breathing gas source of a respirator to a pressure reducer
GB2572255B (en) * 2018-02-19 2020-04-01 Draeger Safety Ag & Co Kgaa High-pressure Connector for a Fluid-communicating Connection of a Breathing Gas Source of a Respirator to a Pressure Reducer
US11364394B2 (en) * 2018-02-19 2022-06-21 Dräger Safety AG & Co. KGaA High-pressure connector for a fluid-communicating connection of a breathing gas source of a respirator to a pressure reducer
EP4684840A1 (fr) * 2024-07-26 2026-01-28 Dräger Safety AG & Co. KGaA Raccord filete securise

Also Published As

Publication number Publication date
CA2204285A1 (fr) 1997-10-23
EP0803269A3 (fr) 1999-03-17
GB9608336D0 (en) 1996-06-26

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