EP0334765A1 - Machine for cleaning screwthreaded holes, especially screwthreaded holes for the closing devices of the access holes and spy holes of steam generators in nuclear-power stations - Google Patents
Machine for cleaning screwthreaded holes, especially screwthreaded holes for the closing devices of the access holes and spy holes of steam generators in nuclear-power stations Download PDFInfo
- Publication number
- EP0334765A1 EP0334765A1 EP89400840A EP89400840A EP0334765A1 EP 0334765 A1 EP0334765 A1 EP 0334765A1 EP 89400840 A EP89400840 A EP 89400840A EP 89400840 A EP89400840 A EP 89400840A EP 0334765 A1 EP0334765 A1 EP 0334765A1
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- European Patent Office
- Prior art keywords
- holes
- machine
- opening
- screwthreaded
- axis
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- 238000004140 cleaning Methods 0.000 title claims abstract description 14
- 230000002093 peripheral effect Effects 0.000 claims abstract description 3
- 230000001680 brushing effect Effects 0.000 claims description 21
- 238000007664 blowing Methods 0.000 claims description 4
- 238000003780 insertion Methods 0.000 claims description 3
- 230000037431 insertion Effects 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 claims description 2
- 230000000284 resting effect Effects 0.000 abstract 1
- 239000000428 dust Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000003100 immobilizing effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
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- B08B1/32—
Definitions
- the present invention relates to a machine for cleaning tapped holes distributed around the periphery of an opening.
- the present invention applies very particularly to the cleaning of tapped holes used for holding by peripheral bolting the obturators of orifices such as the point holes and the eye holes of the steam generators of nuclear power plants.
- the present invention proposes a machine making it possible to rationalize these operations, by ensuring the positioning and the movement with very high precision and perfect repeatability of the cleaning brushes in the tapped holes to be cleaned, the essential phases of the cleaning process. can also be linked automatically or semi-automatically.
- the machine comprises: means for centering and clamping on said opening, making it possible to position the machine on the axis of the opening and to hold it by pressing on the wall of this opening, - brushing means, arranged at a fixed radial distance from the axis of the opening and movable: . in rotation about the axis of the opening so that their trajectory describes a circle intersecting the axes of the different tapped holes distributed peripherally around the orifice, in order to selectively position these brushing means above each of the holes tapped, and . in axial translation along an axis coincident with the axis of a tapped hole, so as to allow the insertion of these brushing means into the tapped hole and their withdrawal from the tapped hole.
- - Means are also provided for indexing, relative to each of the tapped holes, the rotation of the brushing means; preferably, these indexing means comprise a retractable finger, solidly rotating the brushing means and coming into one of the tapped holes other than the tapped hole above which the brushing means are positioned; -
- the machine further comprises blowing and suction means cooperating with the brushing means; -
- a retractable suction housing surrounding the brushing means and coming to be pressed around the tapped hole so as to confine the suction volume there; and
- the centering and clamping means comprise a radially expandable crown taken between two flanges, one of which is fitted by a shoulder against the edge of the orifice.
- FIGS. 1 and 2 represent machines having the same structure and the same operating mode, but the dimensions of the different elements of which differ depending on whether it is cleaning a fist hole (Figure 1) or an eye hole ( Figure 2), the latter being much smaller in size, which makes it possible to have a machine which, although of similar structure, is of greater compactness .
- the reference 1 designates the fist hole ( Figure 1) or the eye hole ( Figure 2), which will be designated subsequently by the term "orifice", orifice which has at its periphery a plurality of tapped holes 2 regularly distributed, used for the bolting of a shutter of this orifice 1.
- the machine 3 firstly comprises means 4 for centering and clamping on the opening 1, which will make it possible to position it exactly on the axis of this opening, while also ensuring the maintenance of the machine by pressing on the wall of the opening, so that the body of the machine and the wall of the pipe where the opening 1 is made will be fully secured, without external support of the machine.
- centering and clamping means 4 comprise a first flange 5 of diameter slightly greater than that of the opening 1, so as to have a shoulder bearing against the rim 6 of this opening, while another flange 7 penetrates inside the opening with the lowest possible clearance.
- a radially expandable element for example an elastic ring 8, which will expand when the flanges 5 and 7 will be brought closer to each other, operation performed by the operation of a capstan 9, made by the operator; the machine will then be clamped due to the tightening of the crown 8 against the wall 10 of the orifice 1.
- the fixed part of the cleaning machine thus secured to the pipe of the steam generator supports an assembly 11 movable in rotation about the central axis 12 of the machine, axis which has been aligned with that of the opening 1 thanks to the centering means 4.
- This moving element 11 supports a rotary brush 13 driven by a pneumatic motor / reduction gear assembly.
- the rotary brush 13 will be able to be placed at the right of each of the holes 2 due to the rotation of the moving assembly 11.
- indexing means 15 comprise, for example, at the end of an arm 16 integral in rotation with the movable assembly 11, a cylindrical finger 17 having a diameter equal, to within a small clearance, to the internal diameter of the tapped holes 2.
- This finger 17 is mounted on a plate 18 movable axially relative to the arm 16 under the effect of the operation of a handle 19 actuated by the 'operator.
- the finger 17 will be able to position itself facing each of the holes 2 and the operation of the handle 19 will push the finger into this hole, immobilizing the moving element 11 in rotation.
- the position of the arm is such that, once this immobilization carried out, the brush 13 is very precisely aligned on the axis of one of the holes 2, for example the holes diametrically opposite to that into which the finger 17 has penetrated, or else another of the holes.
- an additional force recovery finger 20 is provided which will come to press the wall of the pipe not far from the hole, thus avoiding applying a significant force to it which would risk damaging the thread.
- the brushing means will be displaced in axial translation so as to make the brush 13 in the tapped hole to be cleaned.
- This movement of displacement is for example carried out by a hydraulic jack 22 supplied by a pipe 23 so as to control the advance or the retreat of the brush 13.
- suction casing 25 retractable on a fixed part 26, the front part of which is pressed against the periphery of the tapped hole during the entire brushing operation.
- an operating button 27 connected to the brush 13 allows the operator to remove the latter if necessary (for example, for cleaning), without the need to dismantle the machine and separate it from orifice 1.
- the operator centers the machine in the orifice 1 until the shoulder of the flange 5 comes to bear against the rim 6 of this orifice; it then positions the brushing head 13 by indexing the machine by pressing the finger 17 into one of the tapped holes, - It then operates the capstan 9 to clamp the machine in position against the orifice 1; - After having connected the various pneumatic, hydraulic and electrical supply hoses to a control cabinet, it starts the brush as well as the blowing and aspiration by the hose 24; - The machine then performs one or more cleaning cycles (penetration and removal of the brush head 13 in the tapped hole) by automatic operation of the cylinder 22 from the control cabinet; - the machine having returned to its initial position, it is de-indexed (withdrawal of finger 17), then it is indexed (insertion of finger 17) in the adjacent hole, and the cleaning cycle is restarted for the next hole.
Abstract
Description
La présente invention concerne une machine de nettoyage de trous taraudés répartis à la périphérie d'une ouverture.The present invention relates to a machine for cleaning tapped holes distributed around the periphery of an opening.
La présente invention s'applique tout particulièrement au nettoyage des trous taraudés servant au maintien par boulonnage périphérique des obturateurs d'orifices tels que les trous de point et les trous d'oeil des générateurs de vapeur des centrales nucléaires.The present invention applies very particularly to the cleaning of tapped holes used for holding by peripheral bolting the obturators of orifices such as the point holes and the eye holes of the steam generators of nuclear power plants.
On comprendra aisément qu'il est absolument essentiel pour la sécurité que ces trous d'oeil et de poing soient obturés de manière absolument étanche lorsque le générateur de vapeur est en fonctionnement. Or il est apparu que l'encrassement des taraudages, notamment à la suite de travaux produisant des poussières et débris à proximité de ces trous d'oeil et de point, pouvait produire un boulonnage imparfait des obturateurs, inconvénient lourd de conséquences en ce qui concerne la sécurité du générateur de vapeur en cas de remise en service de celui-ci.It will be readily understood that it is absolutely essential for safety that these eye and fist holes are closed in an absolutely sealed manner when the steam generator is in operation. However, it appeared that the fouling of the threads, in particular following work producing dust and debris near these eye and point holes, could produce imperfect bolting of the shutters, a drawback fraught with consequences as regards the safety of the steam generator if it is put back into service.
Il est donc nécessaire, notamment après une phase de travaux, de nettoyer très soigneusement les trous taraudés servant au boulonnage des obturateurs.It is therefore necessary, particularly after a work phase, to clean the threaded holes used for bolting the shutters very carefully.
Jusqu'à présent, cette opération était réalisée manuellement, mais cette tâche s'est avérée fastidieuse (en raison notamment du nombre important de trous taraudés à nettoyer) et de fiabilité incertaine.Until now, this operation was carried out manually, but this task proved to be tedious (in particular because of the large number of tapped holes to be cleaned) and of uncertain reliability.
Pour cette raison, la présente invention propose une machine permettant de rationnaliser ces opérations, en assurant le positionnement et le déplacement avec une très grande précision et une répétabilité parfaite des brosses de nettoyage dans les trous taraudés à nettoyer, les phases essentielles du processus de nettoyage pouvant en outre être enchaînées automatiquement ou semi-automatiquement.For this reason, the present invention proposes a machine making it possible to rationalize these operations, by ensuring the positioning and the movement with very high precision and perfect repeatability of the cleaning brushes in the tapped holes to be cleaned, the essential phases of the cleaning process. can also be linked automatically or semi-automatically.
A cet effet, selon l'invention, la machine comprend :
- des moyens de centrage et de bridage sur ladite ouverture, permettant d'assurer le positionnement de la machine sur l'axe de l'ouverture et son maintien par appui sur la paroi de cette ouverture,
- des moyens de brossage, disposés à une distance radiale fixe de l'axe de l'ouverture et mobiles :
. en rotation autour de l'axe de l'ouverture de manière que leur trajectoire décrive un cercle venant intersecter les axes des différents trous taraudés répartis périphériquement autour de l'orifice, afin de positionner sélectivement ces moyens de brossage au-dessus de chacun des trous taraudés, et
. en translation axiale selon un axe confondu avec l'axe d'un trou taraudé, de manière à permettre l'enfoncement de ces moyens de brossage dans le trou taraudé et leur retrait hors du trou taraudé.To this end, according to the invention, the machine comprises:
means for centering and clamping on said opening, making it possible to position the machine on the axis of the opening and to hold it by pressing on the wall of this opening,
- brushing means, arranged at a fixed radial distance from the axis of the opening and movable:
. in rotation about the axis of the opening so that their trajectory describes a circle intersecting the axes of the different tapped holes distributed peripherally around the orifice, in order to selectively position these brushing means above each of the holes tapped, and
. in axial translation along an axis coincident with the axis of a tapped hole, so as to allow the insertion of these brushing means into the tapped hole and their withdrawal from the tapped hole.
Selon un certain nombre de caractéristiques avantageuses :
- il est en outre prévu des moyens d'indexage, par rapport à chacun des trous taraudés, de la rotation des moyens de brossage ; de préférence, ces moyens d'indexage comportent un doigt rétractable, solidiare en rotation des moyens de brossage et venant pénétrer dans l'un des trous taraudés autres que le trou taraudé au-dessus duquel sont positionnés les moyens de brossage ;
- la machine comprend en outre des moyens de soufflage et d'aspiration coopérant avec les moyens de brossage ;
- il est en outre prévu un carter d'aspiration rétractable entourant les moyens de brossage et venant se plaquer autour du trou taraudé de manière à confiner à cet endroit le volume d'aspiration ; et
- les moyens de centrage et de bridage comprennent une couronne expansible radialement prise entre deux flasques dont l'un vient s'adapter par un épaulement contre le rebord de l'orifice.According to a number of advantageous features:
- Means are also provided for indexing, relative to each of the tapped holes, the rotation of the brushing means; preferably, these indexing means comprise a retractable finger, solidly rotating the brushing means and coming into one of the tapped holes other than the tapped hole above which the brushing means are positioned;
- The machine further comprises blowing and suction means cooperating with the brushing means;
- There is also provided a retractable suction housing surrounding the brushing means and coming to be pressed around the tapped hole so as to confine the suction volume there; and
- The centering and clamping means comprise a radially expandable crown taken between two flanges, one of which is fitted by a shoulder against the edge of the orifice.
D'autres caractéristiques et avantages apparaîtront à la lecture de la description détaillée d'un mode de réalisation préféré de la présente invention, faite en référence aux dessins annexés sur lesquels :
- - la figure 1 montre une machine de nettoyage des trous taraudés servant au boulonnage d'obturateurs de trou de poing de générateurs de vapeur de centrales nucléaires, et
- - la figure 2 montre une machine de nettoyage des trous taraudés servant au boulonnage d'obturateurs de trou d'oeil de générateurs de vapeur de centrales nucléaires
- FIG. 1 shows a machine for cleaning tapped holes used for the bolting of fist hole plugs for nuclear power plant steam generators, and
- - Figure 2 shows a machine for cleaning the tapped holes used for the bolting of eye hole plugs of nuclear power plant steam generators
La description qui va suivre sera faite indifférement en référence aux figures 1 et 2, qui représentent des machines ayant la même structure et le même mode de fonctionnement, mais dont les dimensions des différents éléments diffèrent selon qu'il s'agit du nettoyage d'un trou de poing (figure 1) ou d'un trou d'oeil (figure 2), ce dernier étant de dimension beaucoup plus réduite, ce qui permet d'avoir une machine qui, bien que de structure semblable, est de compacité supérieure.The description which follows will be given without reference to FIGS. 1 and 2, which represent machines having the same structure and the same operating mode, but the dimensions of the different elements of which differ depending on whether it is cleaning a fist hole (Figure 1) or an eye hole (Figure 2), the latter being much smaller in size, which makes it possible to have a machine which, although of similar structure, is of greater compactness .
Sur les figures, la référence 1 désigne le trou de poing (figure 1) ou le trou d'oeil (figure 2), que l'on désignera par la suite sous le terme d' "orifice", orifice qui présente à sa périphérie une pluralité de trous taraudés 2 régulièrement répartis, servant au boulonnage d'un obturateur de cet orifice 1.In the figures, the
La machine 3 comporte tout d'abord des moyens 4 de centrage et de bridage sur l'ouverture 1, qui permettront de la positionner exactement sur l'axe de cetter ouverture, en assurant en outre le maintien de la machine par appui sur la paroi de l'ouverture, de sorte que le corps de la machine et la paroi de la conduite où est pratiquée l'ouverture 1 se trouveront entièrement solidarisés, sans support extérieur de la machine.The
Ces moyens 4 de centrage et de bridage comportent un premier flasque 5 de diamètre légèrement supérieur à celui de l'ouverture 1, de manière à présenter un épaulement venant en appui contre le rebord 6 de cette ouverture, tandis qu'un autre flasque 7 pénètre à l'intérieur de l'ouverture avec le jeu le plus faible possible.These centering and clamping means 4 comprise a
Entre ces flasques 5 et 7 est disposé un élément expansible radialement, par exemple une couronne élastique 8, qui va venir se dilater lorsque les flasques 5 et 7 vont être rapprochés l'un de l'autre, opération réalisée par la manoeuvre d'un cabestan 9, effectuée par l'opérateur ; la machine se trouvera alors bridée du fait du serrage de la couronne 8 contre la paroi 10 de l'orifice 1.Between these
La partie fixe de la machine de nettoyage ainsi solidarisée à la conduite du générateur de vapeur supporte un équipage 11 mobile en rotation autour de l'axe central 12 de la machine, axe qui a été aligné sur celui de l'ouverture 1 grâce aux moyens de centrage 4.The fixed part of the cleaning machine thus secured to the pipe of the steam generator supports an
Cet équipage mobile 11 supporte une brosse rotative 13 entraînée par un ensemble moteur pneumatique/train réducteur.This moving
La brosse rotative 13 va pouvoir se placer au droit de chacun des trous 2 du fait de la rotation de l'équipage mobile 11.The
Afin de positionner cette brosse exactement au droit de chacun des trous, il est prévu des moyens d'indexage 15 qui comportent par exemple, à l'extrémité d'un bras 16 solidaire en rotation de l'équipage mobile 11, un doigt 17 cylindrique ayant un diamètre égal, à une faible jeu près, au diamètre intérieur des trous taraudés 2. Ce doigt 17 est monté sur une plaque 18 mobile axialement par rapport au bras 16 sous l'effet de la manoeuvre d'une poignée 19 actionnée par l'opérateur.In order to position this brush exactly at the right of each of the holes, indexing means 15 are provided which comprise, for example, at the end of an
Ainsi, le doigt 17 va pouvoir se positionner face à chacun des trous 2 et la manoeuvre de la poignée 19 va enfoncer le doigt dans ce trou, immobilisant en rotation l'équipage mobile 11. La position du bras est telle que, une fois cette immobilisation réalisée, la brosse 13 se trouve très précisément alignée sur l'axe de l'un des trous 2, par exemple le trous diamètralement opposé à celui où a pénétré le doigt 17, ou bien un autre des trous.Thus, the
Pour éviter tout endommagement du taraudage au moment où, après la fin de l'opération de brossage, le doigt 17 est rétracté hors du trou où il se trouvait, il est prévu un doigt supplémentaire 20 de reprise d'effort qui va venir appuyer sur la paroi de la conduite non loin du trou, évitant ainsi d'y appliquer un effort important qui risquerait d'endommager le taraudage.To avoid any damage to the tapping at the moment when, after the end of the brushing operation, the
Une fois l'indexage réalisé par pénétration du doigt 17 dans l'un des trous (la rotation de l'équipage mobile étant éventuellement facilitée par la poignée 21), on va déplacer les moyens de brossage en translation axiale de manière à faire pénétrer la brosse 13 dans le trou taraudé à nettoyer. Ce mouvement de déplacement est par example réalisé par un vérin hydraulique 22 alimenté par une conduite 23 de manière à commander l'avance ou le recul de la brosse 13.Once the indexing has been carried out by penetration of the
Il est enfin prévu des moyens de soufflage d'air dans l'axe de la brosse pour faciliter le décollement des particules et poussières, et des moyens d'aspiration de ces particules et poussières éventuellement dégagées, au moyen d'un flexible d'aspiration 24 venant créér une forte dépression au voisinage du trou taraudé à brosser. Pour renforcer l'effet d'aspiration, il est prévu un carter d'aspiration 25, rétractable sur une partie fixe 26, dont la partie antérieure vient se plaquer à la périphérie du trou taraudé pendant toute l'opération de brossage.Finally, provision is made for air blowing means in the axis of the brush to facilitate detachment of the particles and dust, and means for sucking up these particles and dust which may be released, by means of a suction hose. 24 creating a strong depression in the vicinity of the tapped hole to be brushed. To enhance the suction effect, there is provided a
Par ailleurs, un bouton de manoeuvre 27 relié à la brosse 13 permet à l'opérateur de retirer celle-ci en cas de besoin (par exemple, pour nettoyage), sans qu'il soit besoin de démonter la machine et de la séparer de l'orifice 1.Furthermore, an
On va maintenant décrire le mode opératoire de la machine de brossage que l'on vient de présenter :
- tout d'abord, l'opérateur centre la machine dans l'orifice 1 jusqu'à ce que l'épaulement du flasque 5 vienne en appui contre le rebord 6 de cet orifice ;
- il positionne ensuite la tête de brossage 13 en indexant la machine par enfoncement du doigt 17 dans l'un des trous taraudés,
- il manoeuvre ensuite le cabestan 9 pour brider en position la machine contre l'orifice 1 ;
- après avoir branché les différents flexibles d'alimentation pneumatique, hydraulique et électrique à une armoire de commande, il met en route la brosse ainsi que le soufflage et l'aspiration par le flexible 24 ;
- la machine effectue alors un ou plusieurs cycles de nettoyage (pénétration puis retrait de la tête de brossage 13 dans le trou taraudé) par manoeuvre automatique du vérin 22 depuis l'armoire de commande ;
- la machine étant revenue à sa position initiale, on la désindexe (retrait du doigt 17), puis on l'indexe (enfoncement du doigt 17) dans le trou adjacent, et on recommence le cycle de nettoyage pour le trou suivant.We will now describe the operating mode of the brushing machine that we have just presented:
- First of all, the operator centers the machine in the
it then positions the brushing
- It then operates the
- After having connected the various pneumatic, hydraulic and electrical supply hoses to a control cabinet, it starts the brush as well as the blowing and aspiration by the
- The machine then performs one or more cleaning cycles (penetration and removal of the
- the machine having returned to its initial position, it is de-indexed (withdrawal of finger 17), then it is indexed (insertion of finger 17) in the adjacent hole, and the cleaning cycle is restarted for the next hole.
Claims (6)
- des moyens (4) de centrage et de bridage sur ladite ouverture, permettant d'assurer le positionnement de la machine sur l'axe (12) de l'ouverture et son maintien par appui sur la paroi (10) de cette ouverture,
- des moyens de brossage (13), disposés à une distance radiale fixe de l'axe de l'ouverture et mobiles :
. en rotation autour de l'axe (12) de l'ouverture de manière que leur trajectoire décrive un cercle venant intersecter les axes des différents trous taraudés répartis périphériquement autour de l'orifice, afin de positionner sélectivement ces moyens de brossage au-dessus de chacun des trous taraudés, et
. en translation axiale selon un axe confondu avec l'axe d'un trou taraudé, de manière à permettre l'enfoncement de ces moyens de brossage dans le trou taraudé et leur retrait hors du trou taraudé.1. A machine (3) for cleaning tapped holes (2) distributed around the periphery of an opening (1), in particular the tapped holes used for holding, by peripheral bolting, the obturators of orifices such as the point holes and the eye-catchers for steam generators in nuclear power plants, characterized in that it comprises:
- means (4) for centering and clamping on said opening, ensuring the positioning of the machine on the axis (12) of the opening and its maintenance by pressing on the wall (10) of this opening,
- brushing means (13), arranged at a fixed radial distance from the axis of the opening and movable:
. in rotation around the axis (12) of the opening so that their trajectory describes a circle intersecting the axes of the various tapped holes distributed peripherally around the orifice, in order to selectively position these brushing means above each of the tapped holes, and
. in axial translation along an axis coincident with the axis of a tapped hole, so as to allow the insertion of these brushing means into the tapped hole and their withdrawal from the tapped hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT89400840T ATE77268T1 (en) | 1988-03-25 | 1989-03-24 | DEVICE FOR CLEANING FEMALE THREADED HOLES, IN PARTICULAR FEMALE THREADED HOLES FOR CLOSING DEVICES OF ACCESS OPENINGS AND PEEPHOLES OF STEAM BOILERS OF NUCLEAR POWER PLANTS. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8803968A FR2629250A1 (en) | 1988-03-25 | 1988-03-25 | THREADED HOLES CLEANING MACHINE, IN PARTICULAR THREADED HOLES FOR THE PUNCH HOLE AND HOLES HOLE OF STEAM GENERATORS OF NUCLEAR POWER PLANTS |
| FR8803968 | 1988-03-25 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0334765A1 true EP0334765A1 (en) | 1989-09-27 |
| EP0334765B1 EP0334765B1 (en) | 1992-06-17 |
Family
ID=9364662
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP89400840A Expired - Lifetime EP0334765B1 (en) | 1988-03-25 | 1989-03-24 | Machine for cleaning screwthreaded holes, especially screwthreaded holes for the closing devices of the access holes and spy holes of steam generators in nuclear-power stations |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US4962566A (en) |
| EP (1) | EP0334765B1 (en) |
| AT (1) | ATE77268T1 (en) |
| DE (1) | DE68901797T2 (en) |
| ES (1) | ES2032661T3 (en) |
| FR (1) | FR2629250A1 (en) |
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| CN107351093A (en) * | 2017-07-11 | 2017-11-17 | 中国科学院光电技术研究所 | A kind of reactor pressure vessel bolt hole cleaning detection robot |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1659301A (en) * | 1925-12-11 | 1928-02-14 | Foster Wheeler Corp | Handhole closure |
| US3810710A (en) * | 1972-08-10 | 1974-05-14 | J Ennemoser | Vehicle wheel stud drill |
| EP0282388A1 (en) * | 1987-02-26 | 1988-09-14 | Creation De Mecanismes D'automatismes Et D'asservissements | Device for brushing threaded bore holes |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2480167A1 (en) * | 1980-04-15 | 1981-10-16 | Framatome Sa | DEVICE FOR SUPPORTING AND MOVING A TOOL WITHIN A FITTING |
| US4485517A (en) * | 1981-09-08 | 1984-12-04 | Voigt Lothar A | Device for automatically cleaning manhole rims |
-
1988
- 1988-03-25 FR FR8803968A patent/FR2629250A1/en active Pending
-
1989
- 1989-03-24 AT AT89400840T patent/ATE77268T1/en not_active IP Right Cessation
- 1989-03-24 EP EP89400840A patent/EP0334765B1/en not_active Expired - Lifetime
- 1989-03-24 ES ES198989400840T patent/ES2032661T3/en not_active Expired - Lifetime
- 1989-03-24 DE DE8989400840T patent/DE68901797T2/en not_active Expired - Lifetime
- 1989-03-24 US US07/328,389 patent/US4962566A/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1659301A (en) * | 1925-12-11 | 1928-02-14 | Foster Wheeler Corp | Handhole closure |
| US3810710A (en) * | 1972-08-10 | 1974-05-14 | J Ennemoser | Vehicle wheel stud drill |
| EP0282388A1 (en) * | 1987-02-26 | 1988-09-14 | Creation De Mecanismes D'automatismes Et D'asservissements | Device for brushing threaded bore holes |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10304328B3 (en) * | 2003-02-04 | 2004-04-15 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Cleaning appliance for technical surfaces of e.g. work pieces between production processes has nozzle applicator for cleaning fluid moved by compressed air, and freely moveable cleaning brushes |
| CN101961716A (en) * | 2010-09-28 | 2011-02-02 | 桂林电子科技大学 | Ring-die intelligent automatic cleaning plant |
| CN101961716B (en) * | 2010-09-28 | 2013-01-23 | 桂林电子科技大学 | Ring-die intelligent automatic cleaning plant |
| CN106076916A (en) * | 2016-08-19 | 2016-11-09 | 浙江荣亿精密机械有限公司 | A kind of automatic nut endoporus scrap removing machine |
| CN106111569A (en) * | 2016-08-19 | 2016-11-16 | 浙江荣亿精密机械有限公司 | A kind of dry type nut inner hole scrap removing machine |
| CN106111569B (en) * | 2016-08-19 | 2018-08-10 | 浙江荣亿精密机械有限公司 | A kind of dry type nut inner hole scrap removing machine |
| CN106076916B (en) * | 2016-08-19 | 2018-08-10 | 浙江荣亿精密机械有限公司 | A kind of automatic nut endoporus scrap removing machine |
Also Published As
| Publication number | Publication date |
|---|---|
| US4962566A (en) | 1990-10-16 |
| EP0334765B1 (en) | 1992-06-17 |
| FR2629250A1 (en) | 1989-09-29 |
| DE68901797D1 (en) | 1992-07-23 |
| DE68901797T2 (en) | 1992-12-10 |
| ATE77268T1 (en) | 1992-07-15 |
| ES2032661T3 (en) | 1993-02-16 |
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