EP2782710A1 - Installation et procédé de travail par jets de fluide cryogénique avec amélioration de la cloche d'aspiration - Google Patents
Installation et procédé de travail par jets de fluide cryogénique avec amélioration de la cloche d'aspirationInfo
- Publication number
- EP2782710A1 EP2782710A1 EP12787810.6A EP12787810A EP2782710A1 EP 2782710 A1 EP2782710 A1 EP 2782710A1 EP 12787810 A EP12787810 A EP 12787810A EP 2782710 A1 EP2782710 A1 EP 2782710A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- protective enclosure
- heating
- enclosure
- heating device
- fluid
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
- B24C1/003—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods using material which dissolves or changes phase after the treatment, e.g. ice, CO2
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B14/00—Arrangements for collecting, re-using or eliminating excess spraying material
- B05B14/30—Arrangements for collecting, re-using or eliminating excess spraying material comprising enclosures close to, or in contact with, the object to be sprayed and surrounding or confining the discharged spray or jet but not the object to be sprayed
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
- B24C1/08—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for polishing surfaces, e.g. smoothing a surface by making use of liquid-borne abrasives
- B24C1/086—Descaling; Removing coating films
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C9/00—Appurtenances of abrasive blasting machines or devices, e.g. working chambers, arrangements for handling used abrasive material
- B24C9/003—Removing abrasive powder out of the blasting machine
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
- B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
- B05B13/04—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work the spray heads being moved during spraying operation
- B05B13/0421—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work the spray heads being moved during spraying operation with rotating spray heads
Definitions
- the invention relates to an installation and a method for pickling, scouring, surface treatment of coated or uncoated materials, such as metals, concrete, wood, polymers, plastics or any other type of material, by jet of cryogenic fluid at very high pressure.
- the surface treatment of coated or uncoated materials, in particular stripping, peeling or the like, of concrete, paint, etc. can be operated by using cryogenic jets under very high pressure, as proposed by the US documents. -A-7,310,955 and US-A-7,316,363.
- one or more jets of liquid nitrogen are typically used at a pressure of 300 to 4000 bars and at a cryogenic temperature of, for example, between -100 and -200 ° C., typically about -140 and -160 ° C. distributed by a nozzle holder (s) which is set in motion, typically a rotational or oscillatory movement.
- the nitrogen gas delivered by the nozzles if it is released or released in the room where the surface treatment takes place, creates risks of anoxia for the operator especially, if it accumulates there and that the room is badly or not ventilated.
- a suction bell is generally arranged around the surface treatment tool from which the jets of liquid nitrogen exit, said bell being generally equipped with a flexible flap serving to provide a cooling function. mechanical barrier and contact between the suction bell and the surface to be treated.
- the bib can be provided or formed of a row of flexible bristles, an elastic band (rubber, leather, elastomer ...), one or more foam pads ...
- the suction bell allows a partial seal between the tool and the surface to be treated and allows to suck all or part of the nitrogen delivered by the nozzles. This is particularly useful when it is desired to aspire the waste produced during the surface treatment, directly at the source to prevent them from polluting the place where the surface treatment operation takes place, for example stripping. surface, especially in the case of concrete crushing in radioactive environments.
- the suction system used must be in a vacuum to avoid the release of nitrogen in the room / workplace and to be able to suck effectively the surface residues.
- the suction capacity must be greater than the nitrogen flow at the tool. It follows that outside air is inevitably sucked in, which air contains moisture, ie water vapor, which then enters the suction system.
- the aspirated humidity poses a major problem. Indeed, the moisture is adsorbed on the flexible flap, especially on the bristles or the like, and then turns into ice in contact with the low temperatures, typically below -100 ° C, the bell. This can be very inconvenient for manipulations.
- the flexible elements constituting the flap such bristles, by their flexibility, normally have to provide a fundamental role of contact area between the suction bell and the surface to be treated.
- this dry gas protective barrier requires integrating into the working installation a source of dry gas and a feed device conveying this dry gas to the protective enclosure, that is, that is to say that the gas must be conveyed by a gas pipe, or a network of pipes, preferably equipped with a device for controlling and / or regulating the flow of the gas.
- the pressurized dry gas must be free of moisture.
- the dry gas used is generally compressed by a dedicated compressor equipped with filters or any other means of gas purification. This results in a complexification of the working installation by jets of cryogenic fluid.
- the nuclear or chemical industries require, in some cases, to work, that is to say to carry out the operation of pickling, peeling or the like of the treated material, in a local, in others terms a room or environment, depressurized.
- the work installation includes aspirations of predetermined power, depending on the intended applications. Any addition of additional gas in said room, as described in WO-A-2010/10133784, can or even must, in order to maintain the ad hoc depressurization, a modification of the power of the existing aspirations, which is to be excluded .
- the problem to be solved is therefore to propose an installation and a process for pickling, peeling, surface treatment of coated or uncoated materials, such as metals, concrete, wood, polymers, plastics or any other type of material, by jet or jets of cryogenic fluid at high pressure which are improved, that is to say which do not lead or much less frequently, to the aforementioned suction defects due to poor sealing of the bell suction, without excessive complexification of said installation.
- the solution of the invention is then a working installation implementing at least one cryogenic fluid jet under high pressure, in particular liquid nitrogen at a cryogenic temperature between -100 and -200 ° C. and a pressure from 300 to 4000 bars, comprising:
- a source of cryogenic temperature fluid fluidically connected to a mobile tool comprising one or more fluid distribution nozzles
- a protective enclosure arranged around the mobile tool and fluidly connected to suction means, said protective enclosure comprising an open bottom end situated on the side of the fluid distribution nozzle or nozzles, so as to form a suction bell around the moving tool,
- heating means adapted to and adapted to produce and transfer heat to at least the lower end of the enclosure and at least a portion of the periphery of said enclosure. protection, said heating means comprising at least one electric heating device arranged around at least a portion of the protective enclosure and open at the lower end of the protective enclosure.
- the invention may include one or more of the following features:
- the working installation further comprises a power supply device electrically connected to the heating device and allowing said device to produce heat.
- the heating device comprises at least one heating cord wound at least one turn around the protective enclosure.
- the heating device comprises at least one heating blanket covering all or part of the protective enclosure.
- the heating device comprises at least one infrared radiation source arranged around the protective enclosure.
- the heating device comprises at least one device for heating and blowing the ambient air towards the protective enclosure.
- the heating device produces a heating power of between 1 and 500 W, preferably between 1 and 200 W, more preferably between 1 and 100 W.
- the power supply device further comprises means for regulating and / or controlling the heating power of said heating device.
- the protective enclosure comprises at its lower open end, a flap.
- the flap is provided with flexible elements, for example one or more row of flexible bristles, one or more elastic bands (rubber, leather, elastomer ...), one or more foam rolls
- the invention also relates to a method of surface treatment, pickling or peeling, a cryogenic fluid material at high pressure, in which an installation according to.
- a temperature rise of a value strictly below 0 ° C. is produced at a value greater than or equal to 0 ° C. at at least the lower end of the protective enclosure and at least a portion from the periphery of said enclosure.
- the cryogenic fluid dispensed by the nozzle (s) of the mobile tool is at a pressure of at least 300 bar, preferably between 1000 and 5000 bar, and at a temperature below 140 ° C.
- the cryogenic fluid dispensed by the nozzle or nozzles of the moving tool is liquid nitrogen.
- the invention furthermore relates to a method for avoiding or minimizing leakage between the treated substrate and the protective enclosure arranged around the mobile tool of a working installation implementing at least a cryogenic high temperature fluid jet delivered by one or more nozzles equipping a moving tool, in particular a working installation according to the invention, said lower end of the first protective enclosure being positioned facing a surface to be treated , characterized in that produces and transfers heat to at least the lower end of the protective enclosure and on at least a portion of the periphery of said protective enclosure.
- FIG. 1 schematizes the operation of an embodiment of a working installation using cryogenic jets under very high pressure
- FIGS. 2a (side view) and 2b (view from below) schematize an embodiment of a nozzle-carrying tool fitted to the installation of FIG. 1,
- FIG. 3 schematizes an embodiment of a conventional suction system equipping the nozzle-carrying tool of the installation of FIG. 1, and
- Figure 4 shows schematically an embodiment of a suction system according to the present invention equipping the tool nozzle holder equipping the installation of Figure 1.
- FIG. 1 schematizes an embodiment of a conventional pickling, surface treatment or the like by jets of cryogenic liquid usually comprising a storage tank 1, such as a tank, of liquid nitrogen (hereinafter referred to as LN 2 ) which supplies, via a supply line 6 of liquid nitrogen under low pressure, that is to say at about 3 to 6 bar and at a temperature of -180 ° C., a compression device 2, with compressor and internal upstream heat exchanger for ultra high pressure (UHP) setting of liquid nitrogen.
- a storage tank 1 such as a tank, of liquid nitrogen (hereinafter referred to as LN 2 ) which supplies, via a supply line 6 of liquid nitrogen under low pressure, that is to say at about 3 to 6 bar and at a temperature of -180 ° C.
- LN 2 liquid nitrogen
- UHP ultra high pressure
- the compression device 2 thus allows compression of the LN 2 from the storage tank 1.
- the LN 2 at the first pressure (UHP) is then conveyed via a conveying line (7) to an external downstream heat exchanger 3 where the LN2 UHP is cooled with liquid nitrogen at atmospheric pressure (at 9 ° C.). ), to typically obtain UHP liquid nitrogen.
- LN2 at a pressure (UHP) typically greater than 300 bar, generally between 2000 bar and 5000 bar, advantageously between about 3000 and 4000 bar, and at a temperature below -140 ° C., typically between -140 ° C. ° C and -180 ° C, for example of the order of about -150 to -160 ° C, which is sent (in 8) to the tool 4 stripping or the like delivering one or more jets of liquid nitrogen UHP, usually several streams.
- UHP pressure
- the tank 1 of large capacity such as a truck tank or a storage tank of several thousand liters of liquid nitrogen, is generally located outside buildings, that is to say in the open air. It can be fixed or mobile.
- the tank 1 of large capacity is connected in a conventional manner to the installation, that is to say by means of insulated piping comprising one or more control valves ...
- the conveying of LN 2 between the various elements The system is also done via insulated pipes.
- the overall gas flow is approximately 20 l / min or 15 m 3 / min.
- the compression device 2, the external exchanger 3 and especially the tool 4 are in principle located in one or more buildings.
- nitrogen gas continuously escapes at atmospheric pressure (about 1 bar) and about -196 ° C of the two exchangers, namely the upstream exchanger of the compression device 2 and the downstream exchanger 3.
- This exhaust gas nitrogen is via an exhaust device, such as a vent or the like, arranged on each of said heat exchangers 2, 3.
- a tool 4 equipped with nozzles 1 1 of the type used in UHP waterjet processes, but fed here by LN 2 UHP (at 8) and which is rotated or oscillated to obtain rotating or oscillating jets 12 of LN 2 UHP which are used to etch (or equivalent) the surface to treat as shown in Figures 2a (side view) and Figure 2b (bottom view).
- the tool 4 nozzle holder is usually rotated by a set of gears, with or without transmission belt, moved by an electric or pneumatic motor via a first shaft or axis of rotary transmission connected to the motor, a gearbox, a housing or a transmission enclosure comprising an internal gearset transmission mechanism and a second rotary shaft or transmission axis connected thereto for its part.
- mobile tool 4 with nozzles is usually rotated by a set of gears, with or without transmission belt, moved by an electric or pneumatic motor via a first shaft or axis of rotary transmission connected to the motor, a gearbox, a housing or a transmission enclosure comprising an internal gearset transmission mechanism and a second rotary shaft or transmission axis connected thereto for its part.
- mobile tool 4 with nozzles is usually rotated by a set of gears, with or without transmission belt, moved by an electric or pneumatic motor via a first shaft or axis of rotary transmission connected to the motor, a gearbox, a housing or a transmission enclosure comprising an internal
- a protective enclosure 20 forming a suction bell is generally arranged around the tool 4 nozzle holder which distributes the jets 12 of liquid nitrogen.
- the bell 20 has an open bottom end which is positioned opposite the surface to be treated and through which the jets 12 of cryogenic liquid under pressure distributed by the nozzles 11.
- the lower end of the protective enclosure 20 corresponds to the end located on the side of the nozzles 11 delivering the jets 12, that is to say the end of the enclosure 20 located next to the surface to be treated.
- This protective enclosure 20 is generally equipped, at its lower end which comes into contact with or is in the immediate vicinity of the surface to be stripped, of a bib or skirt 21 flexible serving to provide a mechanical barrier function and sealing between the suction bell 20 and the surface to be treated.
- This bib or skirt 21 may be provided with one (or more) rows of flexible bristles, one or more elastic bands (rubber, leather, elastomer ...), one or more foam pads ...
- a conventional vacuum suction system comprising a suction pump, one or more filters or other purification or filtration devices, is in fluid communication with the interior of the protective enclosure 20 to suck efficiently the residues of surface and also avoid the release of nitrogen in the room where the surface treatment is carried out.
- the suction bell 20 constitutes a vacuum enclosure including the tool 4, which makes it possible to recover and evacuate all or part of the nitrogen delivered by the nozzles 11, as well as the dusts generated by the process. stripping or the like.
- the pressure P1 prevailing in the protective enclosure 20 is preferably lower than the atmospheric pressure P0 prevailing outside the enclosure 20, that is to say in the room where the tool 4 is installed. greater than the pressure P0, there is no suction.
- the present invention proposes to incorporate in the conventional suction system of Figure 3 heating means adapted to and designed to produce and transfer heat at the suction bell 20, so as to to minimize the cooling resulting from the flow of fluid at cryogenic temperature in said bell 20, in particular the cooling of its lower end, that is to say the flap provided with one or more rows of flexible bristles or the like.
- the means in other words a heating device of the invention comprise at least one heating device 22 of electric type arranged around at least a portion of the protective enclosure 20 and open at the level of the lower end of the protective enclosure 20.
- the heating means of the invention comprise a power supply device 23 electrically connected to the heating device 22 whose heating power is between 1 and 500 W, typically less than 200 W, advantageously between 1 and 100 W.
- FIG. 4 illustrates an embodiment of the invention in which an electric heating device 22 is incorporated in the suction system equipping the nozzle-carrying tool 4 of the installation of FIG. 1.
- the heating device 22 is arranged around the protective enclosure 20 forming a suction bell and in particular near the row of bristles / flap 21. It is therefore outside the suction bell.
- the heating device 22 is electrically connected to a power supply device 23 which allows the heating device 22 to produce and transfer heat to the protective enclosure 20. The result is heating, that is, say, a rise in temperature, of said enclosure 20. Said otherwise the calories supplied to the protective enclosure 20 by the heating device 22 oppose the frigories provided by the cryogenic fluid flowing within said enclosure 20.
- the present invention makes it possible to minimize or even to avoid the problems of leakage of the bell 20 and of bad suction mentioned above.
- the heating device 22 is arranged around at least a part of the periphery of the protective enclosure 20.
- the heating device 22 may be arranged around the entire periphery of the protective enclosure 20, that is, in all cases, the heating device 22 is open at the lower end of the enclosure 20 of protection in order to allow the bell 20 to fulfill its functions of suction and protection of the area where the surface treatment or the like takes place, without disturbing the surface treatment, pickling or peeling process using the installation of the invention.
- the heating device 22 can cover all or part of the height of the enclosure 20. According to the invention, the heating device 22 is arranged so that the heat it produces is transferred to at least the end lower the protective enclosure 20. Preferably, the heating device 22 is arranged at the lower part of the protective enclosure 20, that is to say near the lower end of the enclosure of protection 20 located opposite the surface to be treated and carrying the flap or flexible protective skirt 21 in contact with the surface to be treated, since it is at this level that mainly penetrates the air loaded with harmful moisture.
- the heating device 22 is advantageously located near the flap 21 but without covering it, so that the flap 21 retains its flexibility and not to risk burning the flexible elements constituting the flap 21.
- the heating device 22 is arranged around the protective enclosure 20, in contact or without contact with said enclosure 20.
- the heat transfer from the heating device 22 to the protective enclosure 20 takes place by conduction.
- the heat transfer of the heating device 22 to the protective enclosure 20 takes place by radiation or by convection.
- the heating device 22 is arranged near the protective enclosure 20, that is to say at a distance enabling an effective transfer of heat between the heating device 22 and the protective enclosure 20, which distance is adjusted according to the desired degree of heating at the level of the protective enclosure 20.
- the heating means 22, 23 may comprise one or more heating devices 22 covering all or part of the periphery of the enclosure 20 and all or part of the height of the protective enclosure 20.
- the heating means 22, 23 may comprise one or more heating devices 22 covering continuously, that is to say without interruption, all or part of the periphery of the protective enclosure 20.
- the heating means 22, 23 may also comprise a plurality of heating devices 22 arranged in contact with each other. other or at regular or irregular intervals along all or part of the periphery of the protective enclosure 20. It is the same along the height of the protective enclosure 20, where one or more heating elements can be arranged in one or more rows, said rows being arranged in contact with one another or at regular or irregular intervals along all or part of the height of the protective enclosure 20.
- the term electric heating device means any device capable of converting into heat the electrical energy supplied by a power supply device.
- the heating device 22 may comprise at least one heating electric cord wound at least one turn around the protective enclosure 20.
- heating cord is meant a ribbon consisting of one or more electrical wires, which produce Joule effect heat, surrounded by an elastomer and a metal braid, if necessary, with a length of the order of 0.5 to 3 m, a width of 10 to 20 mm and a power of from 20 to 80 W / m according to the models. Examples can be found in the documents from Flexelec and describing the Flextape heating tape (RS, RS / J ).
- the heating device 22 may comprise at least one heating blanket covering all or part of the protective enclosure 20.
- This type of cover proposed for example by the company Industrial Diesel, is widely used in the industry to maintain in temperature tanks, electric batteries stored outside heated buildings in the Nordic countries.
- the heating device 22 may comprise at least one device for blowing hot air.
- ambient air that is to say air located outside the protective enclosure 20, ie from the room where the surface treatment operation is carried out, is sucked, heated and blown by the device 22 to the protective enclosure 20.
- the heating device 22 may also comprise at least one infrared radiation source arranged around the protective enclosure 20.
- the heating power of the heating device 22 is preferably between 1 and 500 W, preferably between 1 and 200 W, advantageously between 1 and 200 W. and 100 W.
- powers up to 200 W should be sufficient to solve the problem of ice pickup in most situations, but it goes without saying that higher powers can also be implemented, for example up to 500 W.
- the power supply device 23 may comprise means for regulating and / or controlling the heating power of the heating device 22, thus making it possible to adapt the heating power as a function of the quantity of ice formed at the level of the heating device 22. of the flap 21, which depends in particular on the hygrometry rate of the intake air and the flow of cryogenic fluid circulating in the protective enclosure 20.
- the heating power of the heating device 22 is adjusted so as to produce a rise in temperature of a value strictly below 0 ° C at a value greater than or equal to 0 ° C at at least the lower end of the protective enclosure 20 and at least a portion of the periphery of said protective enclosure 20 .
- the present invention thus makes it possible to minimize, or even prevent, the setting in ice and hardening of the constituent elements of the flap 21 in contact with the lower end of the protective enclosure 20, thus improving the contact between the enclosure of protection 20 and the treated substrate, and therefore the efficiency of the suction system equipping the tool nozzle holder 4 of the work installation.
- the present invention is applicable in any treatment operation by jets of cryogenic fluid, such as liquid nitrogen, in particular surface treatment, pickling or peeling, a material, such as metals, concrete, stone, plastics, wood etc.
- cryogenic fluid such as liquid nitrogen
- pickling or peeling a material, such as metals, concrete, stone, plastics, wood etc.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Cleaning In General (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1160565A FR2982786B1 (fr) | 2011-11-21 | 2011-11-21 | Installation et procede de travail par jets de fluide cryogenique avec amelioration de la cloche d'aspiration |
| PCT/FR2012/052431 WO2013076394A1 (fr) | 2011-11-21 | 2012-10-23 | Installation et procédé de travail par jets de fluide cryogénique avec amélioration de la cloche d'aspiration |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2782710A1 true EP2782710A1 (fr) | 2014-10-01 |
| EP2782710B1 EP2782710B1 (fr) | 2015-10-07 |
Family
ID=47191991
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP12787810.6A Not-in-force EP2782710B1 (fr) | 2011-11-21 | 2012-10-23 | Installation et procédé de travail par jets de fluide cryogénique avec amélioration de la cloche d'aspiration |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP2782710B1 (fr) |
| FR (1) | FR2982786B1 (fr) |
| WO (1) | WO2013076394A1 (fr) |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE7736750U1 (de) * | 1977-12-01 | 1978-03-09 | Bosch-Siemens Hausgeraete Gmbh, 7000 Stuttgart | Elektrische dunstabzugshaube |
| US5315793A (en) * | 1991-10-01 | 1994-05-31 | Hughes Aircraft Company | System for precision cleaning by jet spray |
| US6099398A (en) * | 1998-08-20 | 2000-08-08 | C.D.S. Inc. | Media assist gaseous nitrogen distribution system for deflashing machine |
| US6120357A (en) * | 1999-02-22 | 2000-09-19 | Imation Corp. | System and method for CO2 cleaning of data storage disks |
| US6656017B2 (en) * | 2001-04-24 | 2003-12-02 | David P. Jackson | Method and apparatus for creating an open cell micro-environment for treating a substrate with an impingement spray |
| US7316363B2 (en) | 2004-09-03 | 2008-01-08 | Nitrocision Llc | System and method for delivering cryogenic fluid |
| US7310955B2 (en) | 2004-09-03 | 2007-12-25 | Nitrocision Llc | System and method for delivering cryogenic fluid |
| WO2010000001A1 (fr) | 2008-07-02 | 2010-01-07 | Karen Gasparyan | Outil de blocage et de serrage de barre |
| FR2945761B1 (fr) * | 2009-05-20 | 2012-06-01 | Air Liquide | Installation et procede de traitement de surface par jets de fluide cryogenique. |
-
2011
- 2011-11-21 FR FR1160565A patent/FR2982786B1/fr not_active Expired - Fee Related
-
2012
- 2012-10-23 EP EP12787810.6A patent/EP2782710B1/fr not_active Not-in-force
- 2012-10-23 WO PCT/FR2012/052431 patent/WO2013076394A1/fr not_active Ceased
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2013076394A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2782710B1 (fr) | 2015-10-07 |
| WO2013076394A1 (fr) | 2013-05-30 |
| FR2982786B1 (fr) | 2014-09-19 |
| FR2982786A1 (fr) | 2013-05-24 |
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