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GB2400432A - Gas cylinder with outlet angled to promote rotation rather than projection - Google Patents

Gas cylinder with outlet angled to promote rotation rather than projection Download PDF

Info

Publication number
GB2400432A
GB2400432A GB0308439A GB0308439A GB2400432A GB 2400432 A GB2400432 A GB 2400432A GB 0308439 A GB0308439 A GB 0308439A GB 0308439 A GB0308439 A GB 0308439A GB 2400432 A GB2400432 A GB 2400432A
Authority
GB
United Kingdom
Prior art keywords
gas generator
gas
gravity
centre
outlet
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
GB0308439A
Other versions
GB0308439D0 (en
GB2400432B (en
Inventor
Stefan Muller
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.)
Autoliv Development AB
Original Assignee
Autoliv Development AB
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 Autoliv Development AB filed Critical Autoliv Development AB
Priority to GB0308439A priority Critical patent/GB2400432B/en
Publication of GB0308439D0 publication Critical patent/GB0308439D0/en
Publication of GB2400432A publication Critical patent/GB2400432A/en
Application granted granted Critical
Publication of GB2400432B publication Critical patent/GB2400432B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C1/00—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/26—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/002—Details of vessels or of the filling or discharging of vessels for vessels under pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/04—Arrangement or mounting of valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/06—Closures, e.g. cap, breakable member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/12—Arrangements or mounting of devices for preventing or minimising the effect of explosion ; Other safety measures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C7/00—Methods or apparatus for discharging liquefied, solidified, or compressed gases from pressure vessels, not covered by another subclass
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/26—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow
    • B60R21/261—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow with means other than bag structure to diffuse or guide inflation fluid
    • B60R2021/2612—Gas guiding means, e.g. ducts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/01—Shape
    • F17C2201/0104—Shape cylindrical
    • F17C2201/0119—Shape cylindrical with flat end-piece
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/05—Size
    • F17C2201/058—Size portable (<30 l)
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/01—Mounting arrangements
    • F17C2205/0153—Details of mounting arrangements
    • F17C2205/0157—Details of mounting arrangements for transport
    • F17C2205/0165—Details of mounting arrangements for transport with handgrip
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0107—Single phase
    • F17C2223/0123—Single phase gaseous, e.g. CNG, GNC
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/03—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the pressure level
    • F17C2223/035—High pressure (>10 bar)
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2270/00—Applications
    • F17C2270/07—Applications for household use
    • F17C2270/0772—Inflation devices, e.g. for rescue vests or tyres

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Air Bags (AREA)

Abstract

A gas cylinder 1 has an outlet 4 angled at, or in the region of, a right angle 5 relative to a generally central axis 7,8 of the cylinder 1. In the event of the gas cylinder 1 being activated accidentally, instead of flying off dangerously in the straight line, it may rotate in a confined space, which may be relatively safer.

Description

DESCRIPTION OF INVENTION
"IMPROVEMENTS IN OR RELATING TO A GAS GENERATOR" THE PRESENT INVENTION relates to a gas generator.
Many gas generators have been proposed previously, to inflate air-bags in motor vehicles. Some of these gas generators have elongate or cylindrical form and some of these gas generators have a gas outlet at one end to provide a flow of gas which emerges from the gas generator substantially in alignment with the elongate axis of the gas generator.
Whilst gas generators of this type may work perfectly well when mounted in a motor vehicle it has been found that if the gas generator is inadvertently actuated before the gas generator is mounted in a motor vehicle, the gas generator may turn into a projectile which can be dangerous within a factory or workshop.
The present invention seeks to provide an improved gas generator.
According to the present invention, there is provided a gas generator having a gas outlet, the gas generator having an initial centre of gravity before deployment of the gas generator, and a final centre of gravity following deployment of the gas generator, the gas outlet being configured so that the mass average flow of gas emerging from the gas generator during deployment extends perpendicular to a plane, the plane passing through either the initial centre of gravity or the final centre of gravity, or passing through a line interconnecting the initial centre of gravity and the final centre of gravity.
Preferably the gas generator is of elongate form, the gas outlet being at one end of the gas generator.
Advantageously the gas generator is of elongate form, the gas outlet being part-way along the gas generator, between the two ends of the gas generator.
Conveniently the gas outlet is formed integrally with the gas generator.
Preferably the gas outlet is a subsequently fitted outlet.
Advantageously the gas outlet is provided on an arcuate steel tube.
Conveniently the said plane passes substantially through the mid-point of a line joining the initial centre of gravity and the final centre of gravity.
Preferably wherein the said plane is inclined to the axis of the gas generator.
In order that the invention may be more readily understood, and so that further features thereof may be appreciated, embodiments of the invention will now be described, by way of example, with reference to the accompanying drawings in which: FIGURE 1 is a partially broken away view of one embodiment of a gas generator in accordance with the embodiment; FIGURE 2 is a partially broken away view of another embodiment of a gas generator; FIGURE 3 is a partially broken away view of a further embodiment of a gas generator; and FIGURE 4 is a partially broken away view of a still further embodiment of a gas generator.
Referring initially to Figure 1, a gas generator comprises a generally cylindrical elongate body or housing 1 provided, at one end, with an axial outlet port 2. Integrally formed with the outlet port 2 is a hollow discharge cap 3.
The discharge cap 3 is provided with a gas outlet aperture 4 in one side thereof, the outlet aperture 4 lying in a plane which is slightly inclined with regard to the longitudinal axis of the housing 1. The nature of the aperture 4 is such that any gas emerging from the aperture 4 has a flow direction as indicated by the arrow 5. The flow direction 5 is the mass average flow direction such that the reactionary force exerted by the gas on the gas generator is in precisely the opposite sense to arrow 5.
The desired effect may be achieved by providing the aperture 4 in a plane, the plane being indicated, in Figure 1, by the reference line 6.
It is to be understood that the gas generator will initially have a centre of gravity 7. During actuation of the gas generator, the centre of gravity will move as a consequence of gas being ejected from the gas generator, and in Figure I the terminal centre of gravity is shown as 8.
The plane 6, that is to say the plane perpendicular to the mass average of the flow of gas 5, intersects the line connecting the initial centre of gravity 7 and the terminal centre of gravity 8 at approximately its mid-point. It is envisaged that the initial centre of gravity 7 and the final centre of gravity 8 will be very close together, and thus it will be understood that the reactive force applied to the gas generator as a consequence of gas emerging through the aperture 4 acts perpendicularly to a plane which, at any instant, passes through or very close to the centre of gravity. Consequently whilst the reactionary force may tend to cause the gas generator to rotate, the force will not cause the gas generator to act as a projectile.
Figure 2 illustrates a modified embodiment of the invention in which the outlet port 2 of the gas generator is provided with a subsequently-fitted metal gas flow duct 10 of arcuate form. The gas flow duct 10 terminates with a planar gas outlet aperture 11. Gas emerging from the gas generator of Figure 2 will have a mass average flow as indicated by the line 12, that line being perpendicular to the plane 13 of the gas outlet aperture 11. The plane 13 intersects the line connecting the initial centre of gravity 7 and the final centre of gravity 8.
Figure 3 illustrates a further modified embodiment of the invention in which the outlet port 2 of the gas generator is provided on the side of the gas generator, part-way along the length of the gas generator so to be located between the two ends of the gas generator. In this arrangement the outlet port 2 is again provided with subsequently-fitted metal gas flow duct 10 of arcuate form which is substantially identical with the arcuate gas flow duct provided on the arrangement illustrated in Figure 2. The gas flow duct 10 again terminates with a planar gas outlet aperture 11. Gas emerging form the gas generator of Figure 3 will have a mass average flow as indicated by the arrow 12, that line being substantially parallel to the longitudinal axis of the gas generator 1, and perpendicular to the plane 13 of the gas outlet aperture 11. The plane 13 again intersects the line connecting the initial centre of gravity 7 and the final centre of gravity 8 of the gas generator.
Figure 4 illustrates a further variant, based closely on the arrangement illustrated in Figure 3. In the arrangement of Figure 4, the outlet port 2 of the gas generator is again provided on the side of the gas generator, at a point part way along its length, but this arrangement is angled away from the initial centre of gravity 7 and the final centre of gravity 8 of the gas generator 1. However, the outlet port 2 is once more provided with a subsequently-fitted gas flow duct 10 of arcuate form which terminates with a planar gas outlet aperture 11.
In this arrangement, gas emerging from the gas generator will have a mass average flow as indicated by arrow 12, that line again being perpendicular to the plane 13 of the gas outlet aperture 11. The plane 13 again intersects the line connecting the initial centre of gravity 7 and the final centre of gravity 8.
It is to be understood that the line perpendicular to the mass average flow of gas emerging from the gas generator may actually pass through the initial centre of gravity or the final centre of gravity.
In the present Specification "comprises" means "includes or consists of" and "comprising" means "including or consisting of".
The features disclosed in the foregoing description, or the following Claims, or the accompanying drawings, expressed in their specific forms or in terms of a means for performing the disclosed function, or a method or process for attaining the disclosed result, as appropriate, may, separately, or in any combination of such features, be utilised for realising the invention in diverse forms thereof.

Claims (13)

  1. CLAIMS: 1. A gas generator having a gas outlet, the gas generator having
    an initial centre of gravity before deployment of the gas generator, and a final centre of gravity following deployment of the gas generator, the gas outlet being configured so that the mass average flow of gas emerging from the gas generator during deployment extends perpendicular to a plane, the plane passing through either the initial centre of gravity or the final centre of gravity, or passing through a line interconnecting the initial centre of gravity and the final centre of gravity.
  2. 2. A gas generator according to Claim 1 wherein the gas generator is of elongate form, the gas outlet being at one end of the gas generator.
  3. 3. A gas generator according to Claim 1, wherein the gas generator is of elongate form, the gas outlet being part-way along the gas generator, between the two ends of the gas generator.
  4. 4. A gas generator according to any preceding Claim wherein the gas outlet is formed integrally with the gas generator.
  5. 5. A gas generator according to any one of Claims 1 to 3 wherein the gas outlet is a subsequently fitted outlet.
  6. 6. A gas generator according to Claim 5 wherein the gas outlet is in the form of an arcuate steel tube.
  7. 7. A gas generator according to any one of the preceding Claims wherein the said plane passes substantially through the mid-point of a line joining the initial centre of gravity and the final centre of gravity.
  8. 8. A gas generator according to Claim 2 or 3, dependent thereon, wherein the said plane is inclined to the axis of the gas generator.
  9. 9. A gas generator substantially as herein described with reference to and as shown in Figure 1 of the accompanying drawings.
  10. 10. A gas generator substantially as herein described with reference to and as shown in Figure 2 of the accompanying drawings.
  11. 11. A gas generator substantially as herein described with reference to and as shown in Figure 3 of the accompanying drawings.
  12. 12. A gas generator substantially as herein described with reference to and as shown in Figure 4 of the accompanying drawings.
  13. 13. Any novel feature or combination of features disclosed herein.
GB0308439A 2003-04-11 2003-04-11 Improvements in or relating to a motor vehicle air-bag gas generator Expired - Fee Related GB2400432B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB0308439A GB2400432B (en) 2003-04-11 2003-04-11 Improvements in or relating to a motor vehicle air-bag gas generator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0308439A GB2400432B (en) 2003-04-11 2003-04-11 Improvements in or relating to a motor vehicle air-bag gas generator

Publications (3)

Publication Number Publication Date
GB0308439D0 GB0308439D0 (en) 2003-05-21
GB2400432A true GB2400432A (en) 2004-10-13
GB2400432B GB2400432B (en) 2006-06-14

Family

ID=9956649

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0308439A Expired - Fee Related GB2400432B (en) 2003-04-11 2003-04-11 Improvements in or relating to a motor vehicle air-bag gas generator

Country Status (1)

Country Link
GB (1) GB2400432B (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4446987A (en) * 1981-02-03 1984-05-08 White Kenneth R Valve attachment for pressurized containers
GB2227075A (en) * 1988-11-09 1990-07-18 Paul S Whalen A safety valve for a compression gas cylinder

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4446987A (en) * 1981-02-03 1984-05-08 White Kenneth R Valve attachment for pressurized containers
GB2227075A (en) * 1988-11-09 1990-07-18 Paul S Whalen A safety valve for a compression gas cylinder

Also Published As

Publication number Publication date
GB0308439D0 (en) 2003-05-21
GB2400432B (en) 2006-06-14

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Legal Events

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

Effective date: 20070411