EP0980721B1 - Dispositif mobile pour le nettoyage d'ouvrages de transport de fluides, notamment d'égouts - Google Patents
Dispositif mobile pour le nettoyage d'ouvrages de transport de fluides, notamment d'égouts Download PDFInfo
- Publication number
- EP0980721B1 EP0980721B1 EP99402033A EP99402033A EP0980721B1 EP 0980721 B1 EP0980721 B1 EP 0980721B1 EP 99402033 A EP99402033 A EP 99402033A EP 99402033 A EP99402033 A EP 99402033A EP 0980721 B1 EP0980721 B1 EP 0980721B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- chassis
- tool support
- sediments
- wheels
- hydraulic
- 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.)
- Expired - Lifetime
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Classifications
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F9/00—Arrangements or fixed installations methods or devices for cleaning or clearing sewer pipes, e.g. by flushing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
- B08B9/04—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes
- B08B9/049—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes having self-contained propelling means for moving the cleaning devices along the pipes, i.e. self-propelled
- B08B9/051—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes having self-contained propelling means for moving the cleaning devices along the pipes, i.e. self-propelled the cleaning devices having internal motors, e.g. turbines for powering cleaning tools
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/76—Graders, bulldozers, or the like with scraper plates or ploughshare-like elements; Levelling scarifying devices
- E02F3/7609—Scraper blade mounted forwardly of the tractor on a pair of pivoting arms which are linked to the sides of the tractor, e.g. bulldozers
- E02F3/7613—Scraper blade mounted forwardly of the tractor on a pair of pivoting arms which are linked to the sides of the tractor, e.g. bulldozers with the scraper blade adjustable relative to the pivoting arms about a vertical axis, e.g. angle dozers
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F5/00—Dredgers or soil-shifting machines for special purposes
- E02F5/28—Dredgers or soil-shifting machines for special purposes for cleaning watercourses or other ways
- E02F5/285—Dredgers or soil-shifting machines for special purposes for cleaning watercourses or other ways with drag buckets or scraper plates
Definitions
- the present invention relates to a mobile device for cleaning of fluids transport structures and more particularly of transport of effluents or wastewater.
- WO-95/31 295 describes a method and a device for ensuring cleaning as well as the evacuation of sediments which settle in pipes underground intended in particular for the transport of waste water.
- the device described in this publication consists of a rotary knife combined with a water injection for cleaning. It is operated from the outside and it presents therefore the disadvantage of being a non-independent system which is moved by cable to the interior of the pipe to be cleaned and whose dimensions, which cannot be adjusted, must correspond to those of the pipeline, which makes its use little flexible.
- FR-A-2 658 438 describes a device for clearing pipes which comprises disintegration means, scraping means and cleaning means, these various means being assembled with each other and moved in the pipeline via a cable towed from the outside.
- this device does not solve the problems set out above, in particular with regard to the necessary autonomy and the adaptability to different types and sizes of pipes.
- EP-A-0 365 921 describes a device for cleaning of pipes capable of move in pipes.
- the present invention provides an effective solution by producing a mobile device, autonomous, having the function of destructuring the sediments and moving them then to a point where their extraction and disposal are possible.
- the evacuation of the sediments is done differently depending on their nature.
- the means provided for ensure the destructuring of sediments are supported by one or more sleepers of said chassis, the choice being made according to the distribution of loads, depending on the desired power.
- the means ensuring the destructuring of the sediments are positioned on the tool support.
- the device according to the present invention is present in the form of a movable carriage intended to move, so self-contained, in the pipeline to be cleaned.
- This cart consists of a chassis designated as a whole by the reference 10, which in this example of realization is composed of two beams 12 and 14 beams interconnected by sleepers such as 13, 15, 17 and 19.
- the number, length and shape of these crosspieces can vary depending on the profile of the structure (staircase, arch circle, rectangular shape ...) in order to properly seat the carriage in the structure (for example at the bottom of this book, on the traffic benches when the structure is provided with it, by stepping over a low wall, etc.).
- Some of these sleepers are provided with means intended to receive cleaning tools (not shown in the drawing) ensuring the destructuring of the sediments accumulated in the pipe to be cleaned, the choice of sleepers intended to receive these tools is depending on the load distribution, according to the desired power.
- This chassis is provided at one of its ends (designated below end drive wheels 16, 18. Each of these wheels rotates in bearings provided respectively on each of the side members 12, 14 and it is driven by an independent motor.
- the chassis 10 also has idle load wheels.
- two pairs of idle load wheels are provided respectively 20, 22, 21 and 23, mounted respectively on the longitudinal beams 12, 14, at the end of the chassis opposite to the driving wheels 16, 18 (so-called rear end).
- Each pair of idler wheels journalled in bearings provided respectively on the side members 12, 14.
- the chassis 10 also includes guide wheels with an axle substantially vertical. In this nonlimiting exemplary embodiment, these wheels guides are distributed in pairs, respectively 24, 26 and 25, 27 on the side members 12, 14, at each end of the latter as can be clearly seen on the figures.
- Each guide wheel is mounted at the end of a support such as 28 provided of the wheel rotation shaft, this support being itself mounted at the end of a stirrup 30 welded to a beam such as 12, 14 and having several holes intended to receive a fixing pin for the support 28-guide wheel assembly, so to be able to modify the position of each guide wheel.
- a support such as 28 provided of the wheel rotation shaft
- this support being itself mounted at the end of a stirrup 30 welded to a beam such as 12, 14 and having several holes intended to receive a fixing pin for the support 28-guide wheel assembly, so to be able to modify the position of each guide wheel.
- FIG 1 there is shown in dashed lines different positions which can be occupied by different guide wheels 24, 25, 26, 27.
- These guide wheels are therefore designed so as to ability to roll over the vertical walls of the item to be cleaned. Their characteristics make it possible to adapt the device according to the invention to the dimensions and to the shape of these works.
- the wheels 24, 25, 26, 27 therefore have a role in guiding the device when the latter is not equipped with steered wheels, which is the case of the example of embodiment described and shown here. In particular, they allow the tool to circulate in curved pipes.
- the longitudinal beams 12, 14 are cut between the wheels drive 16,18 and idler wheels 21,23 and 20,22 respectively so as to allow folding of the two parts of the chassis 10 thus produced.
- These two parts are articulated around axes 31 or 32 (respectively upper and lower) so as to fold the frame around one or the other of its axes, according to one or other of the two positions indicated in dashed lines on Figure 2.
- the axes 31 and 32 are of course locked. We pass from this locked position to the position allowing the folding the chassis simply by unlocking one of the axes. This provision makes it possible to introduce the device according to the invention into the structure to be cleaned, when the latter is low ceiling.
- the device also includes a tool holder designated as a whole by the reference 33.
- This tool support visible in FIG. 1 is presented under the form of a braced frame which is rotatably mounted on one of the crosspieces of the chassis 10, in this example, it is the cross member 17.
- the tool support 33 is therefore positioned in front of the drive wheels 16.18. It is provided with means making it possible to adjust its position in height. In this exemplary embodiment, these means are produced in the form a rack winch 34 which is manually operated by the operator seated on the seat 35 mounted on the chassis 10.
- This winch actuates the tool support by through a cable 36 fixed to the front end 37 of the tool holder 33 in passing over a pulley 38 mounted at the front of the chassis 10.
- this manual height adjustment system of the tool holder 33 can be replaced by a sealed electrical mechanism comprising for example a sonar with a remote control, on the surface, for make the settings.
- the front part of the tool holder 33 is provided with cleaning means and sediment disposal.
- these means are produced in the form of two blades 40, 41 articulated at the end of a plate 39 mounted at the end 42 of the tool holder 33, via a pin horizontal articulation 46 (FIG. 2).
- the blades 40, 41 can be deployed and laterally retracted by means of jacks 44, 45 respectively, the cylinders are mounted on the plate 39 using vertical axes so as to ability to drive blades in front-to-back movements allowing to adapt the length of the blade system 40, 41 to the width of the structure to clean.
- FIG. 1 the positions which can be occupied by the blades when actuating the jacks 44, 45.
- the tool holder 33 further comprises a jack 43 whose rod is coupled to the plate 39 and the piston of which is mounted on the tool support 33, so that the blade system 40, 41 can be oriented around a horizontal axis parallel to the tool holder, in a movement of approximately 90 ° upwards and approximately 15 ° towards the low. These positions have been illustrated in dashed lines in FIG. 2.
- Tools for destructuring the sediments accumulated in the pipe to be cleaned can be mounted directly on one of the central crosspieces of the chassis 10, as mentioned above where they can be hung on the tool holder 33 at and under axis 46. In all the exemplary embodiments, these tools are at constant depth in the sediment and they allow to have a continuous destructuring action on sediments accumulated in the pipeline to clean.
- the chassis 10 is further provided with an anti-tilting device intended to prevent the lifting of the part of the chassis opposite the drive wheels 16, 18.
- this anti-rearing device is designed in the form of a horizontal beam 47 made integral with the chassis 10, above the tool support 33 on which the latter comes to rest in the event of an abrupt lifting of this support.
- these means are further provided allowing the chassis 10 to rest on the ceiling of the work to be cleaned.
- these means can be produced in the form of hydraulic risers positioned respectively at the front and rear of the chassis and which support at least one wheel coming to bear on the ceiling of the work. This is a device whose realization is easy for those skilled in the art: for this reason, they have not been shown in the drawing.
- the attachment position of the tool support 33 allows, in the case where a sediment loading bucket is provided for disposal and which is fixed under the chassis 10, to obtain a higher lifting power since the force tends to crush the chassis on the ground, this force being more important than the mass of the device.
- the invention also provides for taking power at the end of the tool holder 33 so as to position a pump therein sludge to ensure the removal of previously destructured sediment.
- the chassis also includes a hauling winch 48 so as to ensure the exit of the device in case of blockage of the latter in the work to be cleaned.
- the device according to the present invention is preferably powered hydraulically, so that it can be submersible.
- Motor supply drive wheels 16, 18 as well as different cylinders control described above is carried out by hydraulic hoses and the power is supplied by a hydraulic group and pump which can be arranged on the surface.
- a hose management system is provided (winding, unwinding) at constant voltage, at low pressure for unwinding and high pressure for winding. This function is automatically slaved, when ordering forward / reverse on the surface.
- the invention also provides a variant according to which the hydraulic unit and the hydraulic pump are mounted on chassis 10, which makes it possible to The device which is the subject of the present invention is completely autonomous.
- the hydraulic group and pump as well as the system ensuring the winding and unwinding of the hoses can be installed on a trailer fitted with stabilizers.
- the device according to the invention can be positioned on edge, possibly in the folded position, on the trailer during transport and its installation in the pipeline.
- the object device of the invention makes it possible to combine two cleaning effects: on the one hand, the destructuring of the sediments accumulated in the structure to be cleaned (thanks to the presence of destructuring tools) and on the other hand, a hunting effect (obtained by implementing the blade system 40, 41) ensuring the movement of destructured sediments up to the point where their evacuation takes place, the latter can be carried out by pumping or using a crane. Height adjustment under the blades 40 and 41 allows to obtain a maximum hunting effect, without impact on the working height of destructuring tools, this flushing effect ensuring the conveyance of destructured sediments to the extraction system.
- the device which is the subject of the invention thanks to the possibilities of adjustment of blades 40 and 41 and guide wheels, allows adaptation to the profile of any work.
- the invention effectively provides a solution effective at the various problems mentioned above.
- the present invention is not limited to the examples of realization described and / or represented here but that it includes all the variants falling within the scope of the invention as defined by the appended claims.
- the propulsion of the device described above instead of being provided by a drive wheel system such as 16 and 18 could be obtained using tracks facilitating changes of direction of the device in the structure to clean.
- the position of the crosspieces 13, 15, 17, 19 can be made adjustable relative to the longitudinal beams 12, 14 constituting the chassis, in order to allow distribute the loads.
- the device which is the subject of the invention can tow a trailer which is loaded by a hydraulic arm supported by the chassis.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Cleaning In General (AREA)
- Vehicle Cleaning, Maintenance, Repair, Refitting, And Outriggers (AREA)
- Handcart (AREA)
- Cleaning By Liquid Or Steam (AREA)
Description
- il faut tenir compte du fait que les canalisations peuvent être de dimensions et de formes différentes (circulaires, rectangulaires, présence de banquettes murales pour la circulation du personnel chargé de l'entretien...), ce qui nécessite une adaptation du matériel de nettoyage à ces contraintes,
- l'intérieur des canalisations n'est généralement accessible qu'à partir de puits qui sont répartis régulièrement sur la longueur desdites canalisations,
- les canalisations peuvent être en charge, ce qui est notamment le cas des canalisations à rejet direct en mer dans lesquelles, compte-tenu des effets des marées, ces canalisations sont pleines à marée haute,
- les sédiments qui se déposent en partie supérieure des canalisations sont hétérogènes et compactés : il faut donc, en priorité, procéder à une déstructuration de cette couche supérieure de sédiments, ce qui nécessite ensuite un outil spécifique pour transporter les sédiments déstructurés vers leur lieu d'élimination.
- un châssis composé de poutres longerons reliées entre elles par des traverses et muni à une extrémité de roues motrices tourillonnant dans des paliers prévus respectivement sur chaque longeron, chaque roue étant entraínée par un moteur indépendant ;
- des paires de roues porteuses folles prévues à l'autre extrémité dudit châssis, chaque paire tourillonnant dans des paliers prévus respectivement sur chaque longeron ;
- des roues guides à axes sensiblement verticaux, disposées chacune le long des longerons dudit châssis et conçues de manière à pouvoir rouler sur les parois latérales dudit ouvrage à nettoyer,
- des moyens de déstructuration des sédiments et,
- un support d'outils, positionné devant les roues motrices et monté sur ledit châssis à l'aide d'un axe de rotation horizontal, ledit support d'outils étant muni de moyens pour régler sa position en hauteur et il est équipé de moyens de nettoyage et d'évacuation des sédiments déstructurés, constitués d'une platine montée à rotation à l'extrémité dudit support d'outils et portant un système de lames orientables pour assurer le nettoyage et l'évacuation des sédiments déstructurés, ladite platine étant munie de moyens pour adapter la longueur du système de lames à la largeur de l'ouvrage et de moyens pour régler la hauteur libre sous ledit système de lames.
Claims (23)
- Dispositif mobile destiné à assurer le nettoyage d'ouvrages de transport de fluides, notamment de canalisations de transport d'effluents ou d'eaux usées comprenant :un châssis (10) composé de poutres longerons (12, 14) reliées entre elles par des traverses (13, 15, 17, 19) et muni à une extrémité de roues motrices (16, 18) tourillonnant dans des paliers prévus respectivement sur chaque longeron, chaque roue étant entraínée par un moteur indépendant ;des paires de roues porteuses folles (20, 21 ; 22, 23) prévues à l'autre extrémité dudit châssis, chaque paire tourillonnant dans des paliers prévus respectivement sur chaque longeron ;des roues guides (24, 25, 26, 27) à axes sensiblement verticaux, disposées chacune le long des longerons dudit châssis et conçues de manière à pouvoir rouler sur les parois latérales dudit ouvrage à nettoyer,des moyens de déstructuration des sédiments et,un support d'outils (33), positionné devant les roues motrices (16, 18) et monté sur ledit châssis (10) à l'aide d'un axe de rotation horizontal, ledit support d'outils étant muni de moyens (34, 36) pour régler sa position en hauteur et il est équipé de moyens de nettoyage et d'évacuation des sédiments déstructurés, constitués d'une platine (39) montée en rotation à l'extrémité (42) dudit support d'outils et portant un système de lames orientables (40, 41) pour assurer le nettoyage et l'évacuation des sédiments déstructurés, ladite platine étant munie de moyens (44, 45) pour adapter la longueur du système de lames à la largeur de l'ouvrage et de moyens (43) pour régler la hauteur libre sous ledit système de lames.
- Dispositif selon la revendication 1 caractérisé en ce les moyens prévus pour assurer la déstructuration des sédiments sont supportés par une ou plusieurs des traverses du châssis (10) , le choix étant effectué en fonction de la répartition des charges, selon la puissance désirée.
- Dispositif selon la revendication 1, caractérisé en ce que les moyens assurant la déstructuration des sédiments sont positionnés sur le support d'outils (33).
- Dispositif selon la revendication 1 caractérisé en ce que lesdites poutres longerons (12, 14) sont réalisées chacune en deux parties maintenues par des moyens de verrouillage, de manière à permettre de replier le châssis.
- Dispositif selon la revendication 1, caractérisé en ce que les deux parties du châssis sont solidarisées l'une de l'autre à l'aide d'arbres (31, 32) disposés sur la même verticale des longerons, le déverrouillage de l'un desdits arbres permettant le repliage du châssis par rotation autour de l'autre arbre.
- Dispositif selon la revendication 1 caractérisé en ce qu'il comporte deux lames (40, 41) chacune montée en rotation sur ladite platine (39) et pourvue d'un vérin (44, respectivement 45) en vue d' en modifier la position angulaire par rapport à l'axe du châssis (10) et donc d'adapter la longueur du système de lames à la largeur de l'ouvrage à nettoyer.
- Dispositif selon l'une quelconque des revendications précédentes caractérisé en ce que le système de lames (40, 41) est muni d'un vérin (43) pour modifier la hauteur sous ledit système, la tige dudit vérin étant articulée sur ladite platine (39) et son piston étant monté sur ledit support d'outils (33).
- Dispositif selon l'une quelconque des revendications précédentes caractérisé en ce que les moyens permettant de régler la position en hauteur du support d'outils sont réalisés sous la forme d'un treuil (34) monté sur le châssis et actionné manuellement depuis le dispositif.
- Dispositif selon l'une quelconque des revendications 1 à 7 caractérisé en ce que les moyens permettant de régler la position en hauteur du support d'outils sont réalisés sous la forme d'un mécanisme électrique étanche avec un sonar à commande à distance en surface.
- Dispositif selon l'une quelconque des revendications précédentes caractérisé en ce que l'on prévoit un système anti-cabrage (47) conçu et positionné de manière à empêcher le soulèvement de la partie du dispositif opposée aux roues motrices (16, 18).
- Dispositif selon la revendication 10 caractérisé en ce que ledit système anti-cabrage est réalisé sous la forme d'une poutre horizontale (47) montée sur le châssis (10) au-dessus du support d'outils (33) sur laquelle vient prendre appui ce dernier en cas de soulèvement brusque dudit support.
- Dispositif selon l'une quelconque des revendications précédentes caractérisé en ce qu'il comporte en outre des moyens lui permettant de prendre appui sur le plafond de l'ouvrage à nettoyer.
- Dispositif selon la revendication 12 caractérisé en ce que les moyens permettant au dispositif de prendre appui sur le plafond de l'ouvrage à nettoyer sont constitués de rehausses hydrauliques positionnées respectivement à l'avant et à l'arrière dudit châssis (10) et qui supportent au moins une roue venant s'appuyer sur ledit plafond.
- Dispositif selon l'une quelconque des revendications précédentes caractérisé en ce qu'il est propulsé hydrauliquement.
- Dispositif selon la revendication 14 caractérisé en ce que le groupe et la pompe assurant la propulsion hydraulique sont embarqués sur ledit châssis.
- Dispositif selon la revendication 13 caractérisé en ce que le groupe et la pompe assurant la propulsion hydraulique sont positionnés en surface, l'alimentation en énergie hydraulique du dispositif étant effectuée à l'aide de flexibles hydrauliques, dont le système de gestion enroulement/déroulement, à tension constante est également disposé en surface.
- Dispositif selon l'une quelconque des revendications précédentes caractérisé en ce que la position desdites traverses (13, 15, 17, 19) est réglable par rapport aux poutres longerons (12, 14) constituant ledit châssis afin de permettre de répartir les charges.
- Dispositif selon l'une quelconque des revendications précédentes caractérisé en ce qu'il comporte en outre une pompe à boues positionnée à l'extrémité du porte outils (33).
- Dispositif selon l'une quelconque des revendications précédentes caractérisé en ce que la position du support d'outils (33) est réglable latéralement par rapport à l'axe dudit châssis (10).
- Dispositif selon l'une quelconque des revendications précédentes caractérisé en ce qu'il comporte une grue pour assurer l'évacuation des sédiments destructurés et transportés au point d'extraction.
- Dispositif selon l'une quelconque des revendications 1 à 19 caractérisé en ce qu'il comporte une pompe pour assurer l'évacuation des sédiments destructurés et transportés au point d'extraction.
- Dispositif selon l'une quelconque des revendications précédentes caractérisé en ce que l'on prévoit un système de vérins au niveau des axes (31, 32) autour desquels s' effectue le repliage dudit châssis (10) positionné et actionné de manière à faciliter les changements de direction du dispositif.
- Dispositif selon l'une quelconque des revendications précédentes caractérisé en ce qu'il est conçu de manière à tracter une remorque qui est chargée par un bras hydraulique prévu par le châssis (10).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9810445 | 1998-08-14 | ||
FR9810445A FR2782284B1 (fr) | 1998-08-14 | 1998-08-14 | Dispositif mobile pour le nettoyage d'ouvrages de transport de fluides, notamment d'egouts |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0980721A1 EP0980721A1 (fr) | 2000-02-23 |
EP0980721B1 true EP0980721B1 (fr) | 2003-05-02 |
Family
ID=9529698
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99402033A Expired - Lifetime EP0980721B1 (fr) | 1998-08-14 | 1999-08-10 | Dispositif mobile pour le nettoyage d'ouvrages de transport de fluides, notamment d'égouts |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0980721B1 (fr) |
AT (1) | ATE238847T1 (fr) |
DE (2) | DE69907339T2 (fr) |
ES (1) | ES2147173T3 (fr) |
FR (1) | FR2782284B1 (fr) |
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Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3344748A1 (de) * | 1982-08-18 | 1985-06-13 | Gert Dipl.-Ing. Steinweller (FH), 2201 Hohenfelde | Wurzel-schneidgeraet fuer die abtrennung von wurzeldurchwachsungen in freigefaelle-grossrohren |
FR2632334B1 (fr) * | 1988-06-02 | 1993-03-05 | Semafor | Dispositif de curage, notamment pour le nettoyage d'un egout en service normal |
EP0365921B1 (fr) * | 1988-10-25 | 1992-03-11 | HEINRICH SCHLICK GmbH | Dispositif passant à travers des canaux fermés |
FR2671298B1 (fr) * | 1991-01-07 | 1993-04-09 | Lorini Jean Luc | Engin de curage destine a curer automatiquement les egouts visitables. |
US5377381A (en) * | 1992-10-26 | 1995-01-03 | Wilson; Edward G. | Cleaning system and method |
-
1998
- 1998-08-14 FR FR9810445A patent/FR2782284B1/fr not_active Expired - Fee Related
-
1999
- 1999-08-10 ES ES99402033T patent/ES2147173T3/es not_active Expired - Lifetime
- 1999-08-10 DE DE69907339T patent/DE69907339T2/de not_active Expired - Fee Related
- 1999-08-10 EP EP99402033A patent/EP0980721B1/fr not_active Expired - Lifetime
- 1999-08-10 DE DE0980721T patent/DE980721T1/de active Pending
- 1999-08-10 AT AT99402033T patent/ATE238847T1/de not_active IP Right Cessation
Also Published As
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DE980721T1 (de) | 2000-10-05 |
DE69907339D1 (de) | 2003-06-05 |
DE69907339T2 (de) | 2003-10-16 |
EP0980721A1 (fr) | 2000-02-23 |
FR2782284B1 (fr) | 2000-11-03 |
ES2147173T1 (es) | 2000-09-01 |
ATE238847T1 (de) | 2003-05-15 |
ES2147173T3 (es) | 2003-11-01 |
FR2782284A1 (fr) | 2000-02-18 |
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