LU100679B1 - Silenced head for fire extinguishing gas discharge - Google Patents

Silenced head for fire extinguishing gas discharge Download PDF

Info

Publication number
LU100679B1
LU100679B1 LU100679A LU100679A LU100679B1 LU 100679 B1 LU100679 B1 LU 100679B1 LU 100679 A LU100679 A LU 100679A LU 100679 A LU100679 A LU 100679A LU 100679 B1 LU100679 B1 LU 100679B1
Authority
LU
Luxembourg
Prior art keywords
head
silent
base
wall
arms
Prior art date
Application number
LU100679A
Other languages
French (fr)
Inventor
Thomas Andreas
Philippe Schmitz
Original Assignee
Luxembourg Patent Co
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 Luxembourg Patent Co filed Critical Luxembourg Patent Co
Priority to LU100679A priority Critical patent/LU100679B1/en
Priority to EP19701326.1A priority patent/EP3740290B1/en
Priority to PCT/EP2019/051273 priority patent/WO2019141819A1/en
Application granted granted Critical
Publication of LU100679B1 publication Critical patent/LU100679B1/en

Links

Classifications

    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C99/00—Subject matter not provided for in other groups of this subclass
    • A62C99/0009—Methods of extinguishing or preventing the spread of fire by cooling down or suffocating the flames
    • A62C99/0018—Methods of extinguishing or preventing the spread of fire by cooling down or suffocating the flames using gases or vapours that do not support combustion, e.g. steam, carbon dioxide
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C31/00—Delivery of fire-extinguishing material
    • A62C31/02—Nozzles specially adapted for fire-extinguishing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/002—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to reduce the generation or the transmission of noise or to produce a particular sound; associated with noise monitoring means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/005—Nozzles or other outlets specially adapted for discharging one or more gases

Landscapes

  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Nozzles (AREA)

Abstract

The invention is directed to a silenced head (2) for a gas discharge, in particular for a fire extinguishing gas discharge, comprising a base (4) with an opening (4.3, 14) forming a gas input; a closed wall (6) made of porous material and extending longitudinally from the base so as to form a distal opening; a front wall (8) made of porous material closing the distal opening of the closed wall (6); a fastening ring (10) arranged against an outer face of the front wall (8) and attached to the base (4) by longitudinal screws (12); wherein the ring (10) comprises a ring portion (10.1) and webs (10.3) extending radially from the ring portion (10.1) so as to form contact surfaces for the front wall (8).

Description

Description
SILENCED HEAD FOR FIRE EXTINGUISHING GAS DISCHARGE
Technical field [0001] The invention is directed to the field of gas discharge, more particularly to the discharge of fire extinguishing gases. Even more specifically, the invention is directed to gas discharge nozzles and heads thereof.
Background art [0002] Prior art patent document published EP 1 151 800 A2 discloses a silenced nozzle head for discharging fire extinguishing gases. The nozzle head comprises a body forming a cylindrical cavity housing filter elements made of porous material, and a perforated disk closing the cavity. The filter elements are made of sintered material and are two superimposed thick disks housed in the cavity. The body comprises a cylindrical wall that can be provided with apertures forming lateral or radial discharge passages. The massive construction of the filter element occupying most of the cavity generate a counter-pressure and a pressure drop for the gas being discharged there through.
[0003] Prior art patent document published EP 2 818 207 A discloses also a silenced nozzle head for discharging fire extinguishing gases. The nozzle head comprises a base with an opening forming a gas input, a closed wall made of porous material and extending longitudinally from the base so as to form a distal opening, a front wall made of porous material closing the distal opening of the closed wall, and a fastening ring arranged against an outer face of the front wall and attached to the base by longitudinal screws. Similarly to the previous reference, the cavity housed a filter element made of porous material causing a counter-pressure and a pressure drop for the gas being discharged there through. The closed wall shows an increased thickness at the location of the screws which extend through the wall. This renders the manufacturing of the wall more complex and expensive.
Summary of invention
Technical Problem [0004] The invention has for technical problem to provide a head for a gas discharge, in particular for a fire extinguishing gas discharge, that causes a reduced pressure while reducing the noise generated when discharging the gas.
Technical solution [0005] The invention is directed to a silenced head for a gas discharge, in particular for a fire extinguishing gas discharge, comprising: a base with an opening forming a gas input; a closed wall made of porous material and extending longitudinally from the base so as to form a distal opening; a front wall made of porous material closing the distal opening of the closed wall; a fastening ring arranged against an outer face of the front wall and attached to the base by longitudinal screws; wherein the ring comprises a ring portion and webs extending radially from the ring portion so as to form contact surfaces for the front wall.
[0006] According to a preferred embodiment, the webs extend radially to the centre of the ring portion.
[0007] According to a preferred embodiment, the webs are three or more.
[0008] According to a preferred embodiment, the webs form with the ring portion apertures with a total cross-sectional area that is larger than 50%, preferably larger than 60%, of the area of the outer face of the front wall.
[0009] According to a preferred embodiment, the webs are integrally formed with the ring portion.
[0010] According to a preferred embodiment, the webs and apertures are formed by machining.
[0011] According to a preferred embodiment, the ring has an outer diameter and the webs have a minimum width that is larger than 5% and/or less than 10% of said outer diameter.
[0012] According to a preferred embodiment, the closed wall shows an inner side delimiting a cavity of the silenced head, the screws being located in the cavity.
[0013] According to a preferred embodiment, the screws are located radially distant from the closed wall.
[0014] According to a preferred embodiment, the closed wall is cylindrical with a constant wall thickness.
[0015] According to a preferred embodiment, the base is a circular plate with an outer edge forming a shoulder housing the closed wall.
[0016] According to a preferred embodiment, the base comprises threaded nuts formed in or attached to the circular plate at locations radially between the opening and the shoulder.
[0017] According to a preferred embodiment, the ring portion of the ring has an outer edge forming a shoulder housing the front wall and the closed wall.
[0018] According to a preferred embodiment, the screws are located on the ring at a junction between the ring portion and the webs.
[0019] According to a preferred embodiment, the opening of the base is configured for receiving a gas discharge nozzle.
[0020] According to a preferred embodiment, the silenced head further comprises the gas discharge nozzle, said nozzle comprising a first series of discharge holes oriented radially and a second series of discharge holes oriented obliquely with regard to a radial plane and the longitudinal axis.
[0021 ] According to a preferred embodiment, the porous material of the closed wall and/or of the front wall is a metallic sintered material.
Advantages of the invention [0022] The invention is particularly interesting in that it provides a gas discharge nozzle assembly that generates a limited counter-pressure and pressure drop while remaining silent, essentially by maximizing the surface of porous material and thereby limiting the flow speed of the gas.
Brief description of the drawings [0023] Figure 1 is a perspective view of a silenced head according to the invention. [0024] Figure 2 is an exploded view of the silenced head of figure 1.
[0025] Figure 3 is a top view of the silenced head of figures 1 and 2.
[0026] Figure 4 is a cross-sectional view of the silenced head of figures 1-3 along the longitudinal axis.
Description of an embodiment [0027] Figure 1 is a perspective view of a silenced head for a gas discharge, in particular for a fire extinguishing gas discharge, according to the invention.
[0028] The silenced head 2 comprises a base 4 with a generally circular plate (not visible in figure 1), a gas inlet at the centre of the circular plate (at the bottom in figure 1), and an outer edge 4.1 forming a shoulder. For instance, a gas discharge nozzle 14 is mounted on the opening at the centre of the base 4. The silenced head 2 comprises also a circular wall 6 extending along the longitudinal axis 7 of the head 2, with a proximate edge 6.1 housed in the shouldered edge 4.1 of the base 4. The circular wall is preferably circular so as to form a cylinder. It is made of porous material, e.g. sintered metal, in order to act as a filter for diffusing the gas while reducing the amount of noise generated by the gas discharge.
[0029] The silenced head 2 comprises also a front wall 8 arranged in contact with the proximal edge 6.2 of the closed wall 6, in order to close the opening formed by said wall. The front wall 8, similarly to the closed wall 6, is made of porous material, e.g. sintered metal, in order to act as a filter for diffusing the gas while reducing the amount of noise generated by the gas discharge.
[0030] The silenced head 2 comprises also a ring 10 arranged on an outer face of the front wall 8. More specifically, the ring 10 comprises a ring portion 10.1 that can form a shoulder for receiving the front wall 8 and the distal edge 6.2 of the closed wall 6. The ring 10 comprises also webs 10.2 that extend in a radial plane, inwardly, from the ring portion 10.1. These webs 10.2 form support and contact surfaces for the front wall 8.
[0031] Eventually, the silenced head 2 comprises also screw 12 that extend essentially longitudinally through the ring 10 and the cavity formed by the closed wall until the base 4.
[0032] Figure 2 is an exploded view of the silenced head 2 of figure 1. The base 4 and the nozzle 14 are better visible than in figure 1.
[0033] We can observe the circular plate 4.2 of the base 4, with a central opening 4.3 delimited by a collar which can form an inner thread for engaging with a corresponding thread on the nozzle 14. Nuts with female threads 4.4 can be formed on, or attached to the circular plate 4.2, for engaging with the screws 12.
[0034] We can also observe that the front wall 8 comprises an outer edge 8.1 contacting the distal edge 6.2 of the closed wall 6. The front wall 8 comprises also openings 8.2 through which the screws 14 extend.
[0035] Figure 3 is a top view of the silenced head 2. We can observe the shape of the ring portion 10.1 and webs 10.2 of the ring 10. Each of the, for instance, three webs 10.2 extends essentially radially inwardly until the centre that corresponds to the longitudinal axis 7. The webs 10.2 and the ring portion 10.1 form then, for instance, three apertures 10.3 with a total cross-section area that is advantageously larger than 50%, preferably 60%, of the front wall 8 (figures 1 and 2) contacting the webs 10.2. The ring 10 is advantageously made of a single piece where the apertures 10.3 can be formed by machining. Other techniques can however also be considered. We can also observe that the hole in the ring 10, through which the screws 12 extend, are located at junctions between the ring portion 10.1 and the webs 10.2.
[0036] Still with reference to figure 3, the width of the webs 10.2 is advantageously less than 10% of the outer diameter d of the ring and/or more than 5% of said diameter d.
[0037] Figure 4 is a cross-section view of the silenced head 2 according to the arrows in figure 3. We can observe that the nozzle 14 comprises a first series of discharge holes 14.1 oriented essentially radially at a mid-height of the cavity formed by the base 4 and the walls 6 and 8. It comprises also a second series of discharge holes 14.2 oriented obliquely with regard to the longitudinal axis 7 and also a radial plane. The holes of the second series 14.2 can be oriented with an angle a with the longitudinal axis 7 that is more than 30° and/or less than 60°, more preferably more than 40° and/or less than 50°.
[0038] The gas being discharge can then be diffused both by the closed wall 6 and by the front wall 8 through the apertures 10.3. This means that the inner surfaces of the cavity able to diffuse the gas is maximized, leading to a reduced counter-pressure and pressure drop, while keeping the gas flow speed reduced and thereby the reducing the noise level.

Claims (17)

1. Tête silencieuse (2) pour une décharge de gaz, en particulier pour une décharge de gaz d'extinction d’incendie, comprenant: - une base (4) avec une ouverture (4.3, 14) formant une entrée de gaz; - une paroi fermée (6) en matériau poreux et s’étendant longitudinalement à partir de la base de manière à former une ouverture distale; - une paroi avant (8) en matériau poreux fermant l'ouverture distale de la paroi fermée (6); - une bague de fixation (10) disposée contre une face externe de la paroi avant (8) et fixée à la base (4) par des vis longitudinales (12); caractérisée en ce que la bague (10) comprend une partie annulaire (10.1 ) et des bras (10.3) s'étendant radialement à partir de la partie annulaire (10.1) de manière à former des surfaces de contact pour la paroi avant (8),A silent head (2) for a gas discharge, in particular for a fire extinguishing gas discharge, comprising: - a base (4) with an opening (4.3, 14) forming a gas inlet; - a closed wall (6) of porous material and extending longitudinally from the base so as to form a distal opening; - a front wall (8) of porous material closing the distal opening of the closed wall (6); - a fixing ring (10) disposed against an outer face of the front wall (8) and fixed to the base (4) by longitudinal screws (12); characterized in that the ring (10) comprises an annular portion (10.1) and arms (10.3) extending radially from the annular portion (10.1) so as to form contact surfaces for the front wall (8). , 2. Tête silencieuse (2) selon la revendication 1, dans laquelle les bras (10.2) s'étendent radialement jusqu'au centre de la partie annulaire (10.1).2. silent head (2) according to claim 1, wherein the arms (10.2) extend radially to the center of the annular portion (10.1). 3. Tête silencieuse (2) selon l'une des revendications 1 et 2, dans laquelle les bras (10.2) sont au nombre de trois ou plus.3. silent head (2) according to one of claims 1 and 2, wherein the arms (10.2) are three in number or more. 4. Tête silencieuse (2) selon l'une quelconque des revendications 1 à 3, dans laquelle les bras (10.2) forment avec la partie annulaire (10.1) des ouvertures (10.3) avec une section transversale totale supérieure à 50%, de préférence supérieure à 60% de la surface de la face externe de la paroi avant (8).4. silent head (2) according to any one of claims 1 to 3, wherein the arms (10.2) form with the annular portion (10.1) openings (10.3) with a total cross section greater than 50%, preferably greater than 60% of the surface of the outer face of the front wall (8). 5. Tête silencieuse (2) selon l'une quelconque des revendications 1 à 4, dans laquelle les bras (10.2) sont formés d'un seul tenant avec la partie annulaire (10.1).5. silent head (2) according to any one of claims 1 to 4, wherein the arms (10.2) are formed integrally with the annular portion (10.1). 6. Tête silencieuse (2) selon les revendications 4 et 5, dans laquelle les bras (10.2) et les ouvertures (10.3) sont formées par usinage.6. silent head (2) according to claims 4 and 5, wherein the arms (10.2) and the openings (10.3) are formed by machining. 7. Tête silencieuse (2) selon l'une quelconque des revendications 1 à 6, dans laquelle la bague (10) a un diamètre extérieur (d) et les bras (10.2) ont une largeur minimale (w) supérieure à 5% et/ou inférieure à 10% dudit diamètre extérieur (d).The silent head (2) according to any one of claims 1 to 6, wherein the ring (10) has an outside diameter (d) and the arms (10.2) have a minimum width (w) greater than 5% and or less than 10% of said outer diameter (d). 8. Tête silencieuse (2) selon l'une quelconque des revendications 1 à 7, dans laquelle la paroi fermée (6) présente un côté interne délimitant une cavité de la tête silencieuse, les vis (12) étant situées dans la cavité.8. silent head (2) according to any one of claims 1 to 7, wherein the closed wall (6) has an inner side defining a cavity of the silent head, the screws (12) being located in the cavity. 9. Tête silencieuse (2) selon l'une quelconque des revendications 1 à 8, dans laquelle les vis (12) sont situées radialement à distance de la paroi fermée (6).9. silent head (2) according to any one of claims 1 to 8, wherein the screws (12) are located radially at a distance from the closed wall (6). 10. Tête silencieuse (2) selon l'une quelconque des revendications 1 à 9, dans laquelle la paroi fermée (6) est cylindrique avec une épaisseur de paroi constante.10. Silent head (2) according to any one of claims 1 to 9, wherein the closed wall (6) is cylindrical with a constant wall thickness. 11. Tête silencieuse (2) selon l'une quelconque des revendications 1 à 10, dans laquelle la base (4) est une plaque circulaire (4.2) avec un bord externe (4.1) formant un épaulement logeant la paroi fermée (6).11. silent head (2) according to any one of claims 1 to 10, wherein the base (4) is a circular plate (4.2) with an outer edge (4.1) forming a shoulder housing the closed wall (6). 12. Tête silencieuse (2) selon la revendication 11, dans laquelle la base (4) comprend des écrous filetés (4.4) formés dans ou fixés à la plaque circulaire (4.2) à des endroits situés radialement entre l’ouverture (4.3, 14) et l'épaulement (4-1).The silent head (2) according to claim 11, wherein the base (4) comprises threaded nuts (4.4) formed in or attached to the circular plate (4.2) at locations radially between the opening (4.3, 14). ) and the shoulder (4-1). 13. Tête silencieuse (2) selon l'une quelconque des revendications 1 à 12, dans laquelle la partie annulaire (10.1) de la bague (10) présente un bord extérieur formant un épaulement logeant la paroi avant (8) et la paroi fermée (6).13. silent head (2) according to any one of claims 1 to 12, wherein the annular portion (10.1) of the ring (10) has an outer edge forming a shoulder housing the front wall (8) and the closed wall (6). 14. Tête silencieuse (2) selon l'une quelconque des revendications 1 à 13, dans laquelle les vis (12) sont situées sur la bague (10) au niveau de jonctions entre la partie annulaire (10.1) et les bras (10.2).14. silent head (2) according to any one of claims 1 to 13, wherein the screws (12) are located on the ring (10) at junctions between the annular portion (10.1) and the arms (10.2). . 15. Tête silencieuse (2) selon l'une quelconque des revendications 1 à 14, dans laquelle l'ouverture (4.3) de la base (4) est configurée pour recevoir une buse de décharge de gaz (14).The silent head (2) according to any one of claims 1 to 14, wherein the opening (4.3) of the base (4) is configured to receive a gas discharge nozzle (14). 16. Tête de silencieux (2) selon la revendication 15, comprenant en outre la buse de décharge de gaz (14), ladite buse comprenant une première série de trous de décharge (14.1) orientés radialement et une seconde série de trous de décharge (14.2) orientés obliquement à un plan radial et à l'axe longitudinal (7).The muffler head (2) according to claim 15, further comprising the gas discharge nozzle (14), said nozzle comprising a first series of radially oriented discharge holes (14.1) and a second series of discharge holes ( 14.2) oriented obliquely to a radial plane and to the longitudinal axis (7). 17. Tête silencieuse (2) selon l'une quelconque des revendications 1 à 16, dans laquelle le matériau poreux de la paroi fermée (6) et/ou de la paroi avant (8) est un matériau fritté métallique.17. Silent head (2) according to any one of claims 1 to 16, wherein the porous material of the closed wall (6) and / or the front wall (8) is a metal sintered material.
LU100679A 2018-01-21 2018-01-21 Silenced head for fire extinguishing gas discharge LU100679B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
LU100679A LU100679B1 (en) 2018-01-21 2018-01-21 Silenced head for fire extinguishing gas discharge
EP19701326.1A EP3740290B1 (en) 2018-01-21 2019-01-18 Silenced head for fire extinguishing gas discharge
PCT/EP2019/051273 WO2019141819A1 (en) 2018-01-21 2019-01-18 Silenced head for fire extinguishing gas discharge

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
LU100679A LU100679B1 (en) 2018-01-21 2018-01-21 Silenced head for fire extinguishing gas discharge

Publications (1)

Publication Number Publication Date
LU100679B1 true LU100679B1 (en) 2019-07-22

Family

ID=61627142

Family Applications (1)

Application Number Title Priority Date Filing Date
LU100679A LU100679B1 (en) 2018-01-21 2018-01-21 Silenced head for fire extinguishing gas discharge

Country Status (3)

Country Link
EP (1) EP3740290B1 (en)
LU (1) LU100679B1 (en)
WO (1) WO2019141819A1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140069663A1 (en) * 2012-02-21 2014-03-13 Koatsu Co., Ltd. Injection head having silencing function for gas-type fire extinguisher
JP2017104560A (en) * 2009-10-23 2017-06-15 エア・ウォーター防災株式会社 Gas fire-extinguishing equipment
WO2017216851A1 (en) * 2016-06-13 2017-12-21 株式会社コーアツ Fire extinguisher

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1317475B1 (en) 2000-05-05 2003-07-09 Vesta S R L NOZZLE SILENCED FOR THE DISCHARGE OF EXTINGUISHING GASES.

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017104560A (en) * 2009-10-23 2017-06-15 エア・ウォーター防災株式会社 Gas fire-extinguishing equipment
US20140069663A1 (en) * 2012-02-21 2014-03-13 Koatsu Co., Ltd. Injection head having silencing function for gas-type fire extinguisher
WO2017216851A1 (en) * 2016-06-13 2017-12-21 株式会社コーアツ Fire extinguisher

Also Published As

Publication number Publication date
EP3740290A1 (en) 2020-11-25
WO2019141819A1 (en) 2019-07-25
EP3740290B1 (en) 2021-10-20

Similar Documents

Publication Publication Date Title
EP0821201B1 (en) Screen-deflector assembly for the combustion chamber of a gas turbine
CA2577507C (en) Turbine engine combustion chamber
FR2751054A1 (en) ANTI-NOX COMBUSTION CHAMBER WITH ANNULAR TYPE FUEL INJECTION
WO2004020800A1 (en) Multi-jet nozzle for engine cooling and engines equipped with such nozzles
FR2641618A1 (en) MIRROR HEAD FOR LASER
CA2519704A1 (en) Push button pertaining to a spray
WO2017032952A1 (en) Device for attaching manifolds for cooling the casing of a turbine-engine turbine by air jets
FR2525279A1 (en) COOLING SYSTEM FOR TURBINES
EP3696463A1 (en) Valve for controlling a gas flow and tap comprising such a valve
FR2772644A1 (en) Atomising nozzle with static flow inhibitor
FR2964725A1 (en) AERODYNAMIC FAIRING FOR BOTTOM OF COMBUSTION CHAMBER
FR3050125A1 (en) SPRAY NOZZLE, IN PARTICULAR FOR A SYSTEM FOR DISTRIBUTING A PRESSED PRODUCT WITH A PUSH BUTTON, AND A DISTRIBUTION SYSTEM COMPRISING SUCH A NOZZLE
FR2485399A1 (en) SPRAY TUBE IN FULL CONE
EP3660299A1 (en) Structure for acoustic absorption including a system for draining liquid and propulsion assembly comprising such a structure for acoustic absorption
FR3024218A1 (en) INTAKE DISPENSER FOR EVAPORATOR, METHOD FOR MANUFACTURING SUCH DISPENSER, EVAPORATOR COMPRISING SUCH DIFFUSER, AND DIPHASIC HEAT PUMP THERMAL INSTALLATION
EP3740290B1 (en) Silenced head for fire extinguishing gas discharge
EP2211097A2 (en) Double gas burner
CA1257144A (en) Pulverizing of a liquid or pasty product, and nozzle used in this process
FR2624923A1 (en) Axial or centrifugal/axial fan for circulating a gas
EP0448467B1 (en) Push button with an internal nozzle, with lateral projection for a high pressure and high pace atomising pump
EP0663240B1 (en) Dispensing device with reduced pressure loss and comprising a dispensing nozzle
EP0434577A1 (en) Exhaust outlet with gas cleaner
FR2993347A1 (en) Crossing ring for use in injection system of combustion chamber of e.g. standard turbojet in aircraft, has centering elements projecting towards interior part of ring, and passages defined between elements for circulation of air flow
EP4519605B1 (en) SURFACE COMBUSTIBLE AND EXPLOSION-PROOF GAS BURNER
EP1797963B1 (en) Mixing chamber and spraying device comprising said chamber

Legal Events

Date Code Title Description
FG Patent granted

Effective date: 20190722

PD Change of ownership

Owner name: ROTAREX S.A.; LU

Free format text: FORMER OWNER: LUXEMBOURG PATENT COMPANY S.A.

Effective date: 20211025