EP3760830B1 - Dispositif de fermeture d'une cavité formée dans le sol - Google Patents

Dispositif de fermeture d'une cavité formée dans le sol Download PDF

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Publication number
EP3760830B1
EP3760830B1 EP20172065.3A EP20172065A EP3760830B1 EP 3760830 B1 EP3760830 B1 EP 3760830B1 EP 20172065 A EP20172065 A EP 20172065A EP 3760830 B1 EP3760830 B1 EP 3760830B1
Authority
EP
European Patent Office
Prior art keywords
mandrel
plate
opening
cavity
diameter
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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.)
Active
Application number
EP20172065.3A
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German (de)
English (en)
Other versions
EP3760830A1 (fr
Inventor
Michael Strzodka
Jan Magister
Andreas BÜRGER
Peter Biegel
Sokrates Giapapas
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GMB GmbH
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GMB GmbH
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Filing date
Publication date
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Publication of EP3760830A1 publication Critical patent/EP3760830A1/fr
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Publication of EP3760830B1 publication Critical patent/EP3760830B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B33/00—Sealing or packing boreholes or wells
    • E21B33/02—Surface sealing or packing

Definitions

  • the present invention relates to a device for closing a cavity formed in the ground, in particular vertical bores or shafts in the ground, which can lead to a daybreak.
  • Filter wells have been used for opencast mine drainage in brown coal mining for years. Some of these filter wells will be dredged over as the opencast mining progresses, while another part will remain standing and must be preserved. If storage is carried out improperly, daytime breakages can occur due to masses slipping into the cavity of the filter tube. In order to avoid such events and the resulting threats to public safety, safe storage of filter wells is necessary. To date, such subsequent storage has been carried out by subsequently drilling the filter well and then filling it with a clay-ash-sediment suspension. Such a procedure leads to considerable costs.
  • a device for sealing a damaged outlet socket of a borehole pipe comprising a pipe socket and a casing ring, the pipe socket and/or the casing ring being connected or connectable to a flexible hose on the side opposite the borehole.
  • EP 0 839 964 A2 discloses a cover for covering drill holes in concrete floors, asphalt floors and the like.
  • the present invention is based on the object of providing a device with which the upper opening of vertical bores or shafts in the ground can be closed or stored easily, safely, cost-effectively, reliably and permanently.
  • the immediate surroundings of the opening to be closed can consist of soil, which can be composed of loose or hard rock depending on the local geology.
  • the immediate surroundings of the opening to be closed can be leveled using suitable tools.
  • the present invention relates to the subjects mentioned in the claims.
  • the device according to the invention with a plate and a mandrel has the advantage that the device described here has a plate which has a diameter that is significantly larger than the opening of the cavity to be closed, and that the device is essentially on the closing opening supports surrounding ground.
  • the device is therefore independent of the shape and stability of the opening or cavity to be closed. This makes a much more cost-effective device possible for closing the cavity formed in the ground, in particular vertical bores or shafts in the ground.
  • the inner wall of the cavity formed in the ground can be partially or completely lined by one or more supporting or expansion elements with a central opening.
  • the mandrel preferably has a length in the direction of gravity that is longer than the uppermost support or expansion element closest to the opening. This prevents the mandrel from slipping horizontally in the event that the top support or expansion element slips or is completely or partially destroyed.
  • the plate can be circular, polygonal or oval.
  • the plate can be formed into different shapes. This has the advantage that the construction of the plate offers a wide range of options and adapts to the respective conditions around the opening to be protected can be adjusted.
  • the plate is rectangular, in particular square.
  • the mandrel preferably projects beyond the uppermost edge of the opening of the cavity to be preserved. In other words, part of the mandrel lies above the opening of the hole or shaft to be protected.
  • the outer shape of the mandrel is preferably partially or completely cylindrical or conical.
  • the conically shaped part of the mandrel can be designed to partially or completely protrude from the plate in the direction of introduction into the cavity to be preserved and thus to be insertable into the cavity to be preserved. This has the advantage that the mandrel can be produced cost-effectively, for example using a lathe.
  • the mandrel of the device according to the invention can be solid or comprise one or more mandrel cavities.
  • the mandrel is present as a separate element separate from the plate and is designed to be connectable to the plate.
  • the mandrel and plate can be manufactured separately, transported and only connected together at the point of use. This allows further flexibility in the use of the device and possibly makes it easier to transport the device to the place of use.
  • the mandrel is designed in one piece. This prevents any unintentional separation of the parts.
  • the plate has a central primary plate opening with a diameter that is smaller than the diameter of the end of the mandrel facing away from the opening to be stored in the device according to the invention, while the opposite end of the mandrel has a diameter that is smaller than the diameter of the central primary plate opening.
  • the mandrel can thus be introduced into the central primary plate opening in such a way that part of the mandrel protrudes from the plate in the direction of the cavity to be protected, while the mandrel cannot be completely passed through the central primary plate opening.
  • the central primary plate opening and the mandrel are designed in such a way that the mandrel cannot fall through the central primary plate opening.
  • the mandrel can have a partially conical outer shape.
  • the mandrel may have a circular cross-section at one end with a diameter smaller than the diameter of the central primary plate opening, with the opposite end of the mandrel having a circular cross-section with a diameter larger than the diameter of the central one primary plate opening.
  • the mandrel and the plate are designed to be connectable to one another by a bayonet lock or via projections, extensions or barbs and complementary recesses.
  • the mandrel and the plate have one or more extensions and/or recesses, the mandrel and plate being designed to complement each other in such a way that the mandrel and plate can be connected to one another by means of the extensions and/or recesses.
  • the plate preferably has elements that allow manual or mechanical transport or manual or mechanical assembly.
  • the plate has hooks, eyes and/or handle elements so that the device can be transported and assembled in an efficient manner.
  • the plate can have at least one secondary plate opening, which is preferably formed perpendicular to the surface of the plate, the at least one secondary plate opening being arranged in such a way that it communicates with the primary plate opening (5) for inserting the at least one mandrel (2). not overlapped.
  • the at least one secondary plate opening can be used to fasten or fix the plate to the ground using, for example, a ground anchor or the like.
  • the surface of the plate is quadrangular (e.g. rectangular, in particular square), with four secondary plate openings each assigned to one of the corners of the plate.
  • the diameter of one, several or all secondary plate openings is preferably no more than a quarter of the diameter of the base of the mandrel or the central primary plate opening.
  • the plate is preferably designed in one piece. This has the advantage that the plate does not have to have any additional connecting elements for connecting separate plate parts. This leads to a reduction in manufacturing costs.
  • the plate can be designed in several parts, the plate then having at least two segments that can be permanently attached to one another.
  • the plate has at least one embossed or printed identification and/or a marker.
  • the plate may contain embossed or printed markings on one or more sides, for example text, numbers, symbols or QR code (Quick Response Code).
  • QR code Quick Response Code
  • the plate can contain other markers, in the form of metal bodies, RFID (Radio-Frequency Identification) or NFC (Near-Field Communication), for better location. This has the advantage that marks of origin and quality seals are attached and improved location of the device is possible.
  • the mandrel preferably has a circular or oval cross section. This has the advantage that the mandrel can be produced cost-effectively, for example using a lathe.
  • the mandrel can have at least two individual columns or columns that are braced together. This has the advantage that the mandrel or the device as a whole can be reinforced in an efficient, material-friendly manner.
  • the mandrel preferably has at least one sealing lamella.
  • the sealing lamella is designed and attached in such a way that the most effective closure of the opening of the cavity to be protected is achieved.
  • the sealing lamella is usually arranged on one of the outer sides of the mandrel. This has the advantage that an effective sealing of the opening of the cavity to be closed is possible.
  • a damping element is preferably arranged between the mandrel and the inner wall of the cavity. This has the advantage that the device is protected not only against forces directed in the direction of gravity, but also against horizontal forces. This ensures that the device according to the invention covers the cavity to be closed securely, permanently and reliably.
  • the present invention also relates to a method for closing a cavity formed in the ground, preferably for closing vertical bores or shafts in the ground, particularly preferably for closing filter wells for opencast mine drainage, the method according to the invention being characterized in that that the cavity is closed by using a device according to the invention and that no possible daybreak endangers public safety.
  • the immediate surroundings of the opening of the cavity to be closed are leveled before the device according to the invention is inserted.
  • the immediate surroundings of the opening of the cavity preferably extends at least to the area around the opening of the cavity to be closed, which is covered by the plate of the device according to the invention.
  • a depression or pit can first be dug around the opening of the cavity to be closed before the device according to the invention is used.
  • the depression or pit can be filled again after inserting the device according to the invention and, if necessary, leveled to the surface.
  • the present invention also relates to a use of the device according to the invention, wherein the device according to the invention is used to close a cavity formed in the ground, preferably a vertical bore or shaft in the ground, particularly preferably a filter well for opencast mine drainage.
  • a device 10 according to a first embodiment is shown in a schematic sectional view.
  • the device 10 is designed to close a cavity 12 formed in the ground 11.
  • the device 10 comprises a plate 1 and a mandrel 2.
  • the plate 1 has an area that is at least twice larger than the area of the opening 3 of the cavity 12 to be covered.
  • the plate 1 is supported on the ground 11 surrounding the opening 3 .
  • the plate 1 has a circular shape.
  • the mandrel 2 comprises a head element 31 and a body element 32. The mandrel 2 is held in a form-fitting manner on the plate 1 in the middle of the plate 1 and normal to the plate plane and is arranged in the direction of gravity.
  • the mandrel 2, or the body element 32 can be introduced into the cavity 12 through the opening 3, the mandrel 2 preferably having a length in the direction of gravity of at least 50 cm, preferably at least 60 cm, more preferably at least 80 cm, in particular preferably from 60 cm to 180 cm or from 80 cm to 150 cm.
  • the mandrel 2, or the head element 31 has a circular shape.
  • the mandrel 2 can be partially conical in its outer shape, with the end D1 of the mandrel 2 on the plate side having a larger diameter compared to the diameter at the opposite end D2 of the mandrel 2.
  • the diameter of the cross section at the end D2 is therefore smaller than the diameter of the cross section at end D1.
  • the diameter of the cross section at the end D2 is smaller than the diameter of the cavity 12 to be kept or the opening 3 of the cavity 12 to be kept.
  • the length of the mandrel 2 exceeds the uppermost edge 4 of the opening 3 of the cavity 12 to be kept.
  • Figure 3 illustrates a schematic representation of a further embodiment of the device 10 according to the invention.
  • the mandrel 2 is completely cylindrical in its external shape, i.e. with a constant cross section over the length of the body element 32 of the mandrel 2.
  • the end D1 of the mandrel 2 points , or the body element 32, on the side facing the plate has a cross section that corresponds to the cross section at the end D2.
  • the diameter a of the cross section of the end D1 and D2 of the mandrel 2 is adapted to the diameter of the opening 3 of the cavity 12 to be closed and can, for example, be between 300 mm and 100 mm, in particular 315 mm.
  • the body element 32 comprises a first body part 41 and a second body part 42.
  • the first body part 41 has a length b, which is, for example, between 160 mm and 230 mm, in particular 194 mm.
  • the second body part 42 has a length c which is between 800 mm and 1200 mm, in particular 1000 mm.
  • the first body part 41 can be connected to the second body part 42 by means of a butt seam 43.
  • the head element 31 of the mandrel 2 includes a first head part 44 and a second head part 45, which are non-positively connected to one another, for example by welding.
  • the first head part 44 has a thickness g that is between 15 mm and 50 mm, in particular 30 mm.
  • the second head part 45 has a thickness h that is between 15 mm and 35 mm, in particular 25 mm.
  • the first head part 44 has a diameter d that is between 320 mm and 360 mm, in particular 340 mm.
  • the second head part 45 has a diameter e that is between 250 mm and 300 mm, in particular 277.6 mm.
  • the mandrel 2 can have an additional extension 46 at the end D1, which has a diameter f that is between 315 mm and 390 mm, in particular 370 mm.
  • the head element 31 can be connected to the body element 32, for example by means of a pre-weld collar 47.
  • the mandrel 2 can have a mandrel cavity. Part of the mandrel 2 preferably projects beyond the plate 1.
  • the mandrel cavity has a diameter e which is between 250 mm and 300 mm, in particular 277.6 mm.
  • the outer shape of the mandrel 2 can be partially or completely cylindrical or conical.
  • the plate 1 has a central primary plate opening 5, with the mandrel 2 being inserted into the central primary plate opening.
  • the mandrel 2 can be connected to the plate 1 as a separate element.
  • the plate 1 has the central primary plate opening 5 through which the mandrel 2 can be introduced into the cavity 12. It is provided that the plate 1 has a central primary plate opening 5 with a diameter smaller than a diameter of the mandrel 2, so that only a part of the mandrel 2 can be inserted through the central plate opening 5 and the mandrel 2 is designed such that a Falling of the mandrel 2 through the central primary plate opening 5 is excluded.
  • the mandrel 2 can be at least partially conical.
  • the mandrel 2 has a cross section at the end D2 with a diameter smaller than the diameter of the central primary plate opening 5, the end D1 of the mandrel 2 having a circular cross section with a diameter larger than the diameter of the central primary Plate opening 5. This means that only part of the mandrel 2 can be inserted through the central primary plate opening 5, with the remaining part of the mandrel 2 being stopped by the edge 6 of the central primary plate opening 5.
  • Figure 4 illustrates a further embodiment of the device 10.
  • the mandrel 2 and the plate 1 are preferably designed to be connectable to one another by a bayonet lock 13 or barb 14.
  • a longitudinal slot can be arranged on the outside of the body element 32 of the mandrel 2, the end of which is adjoined at right angles by a short transverse slot (not illustrated in the figures).
  • the inner side of the central primary plate opening 5 of the plate 1 has an extension which can be inserted into the transverse slot and then effects the firm connection. If the body element 32 is inserted through the central primary plate opening 5, a plug-and-turn movement can take place, whereby the extension can snap into the corresponding transverse slot through the longitudinal slot.
  • the plate 2 can be formed in several parts, for example in four segments or parts 15, 16, 17, 18. At least two segments, preferably at least four segments or parts 15, 16, 17, 18, can be fastened to one another.
  • the plate 1 is preferably designed in such a way that the plate 1 has sufficient stability, which is caused by material properties, thickness of the plate 1 or the internal structure of the plate 1, in order to withstand acting vertical forces.
  • Figure 6 shows a further embodiment of the device 10, wherein the plate 1 has elements, in particular carrying handle elements 19, which are used for manual or mechanical transport or manual or mechanical assembly.
  • the carrying handle elements 19 can be arranged on the plate 1 in such a way that the carrying handle elements 19 are designed to be rotatable about an axis 20 along the surface of the plate 1. This may allow rotation of the carrying handle elements 19 about the axis 20 for gripping the carrying handle element 19 and carrying the plate 1.
  • the side 21 of the plate 1 can have an embossed or printed identification 22 and a marker 23.
  • Figures 7 to 11 illustrated various further embodiments of the device 10, wherein the plate 1 and the mandrel 2 or the head element 31 have different geometric shapes.
  • the plate 1 is preferably square, with the mandrel 2 having a circular cross section.
  • the plate 1 is preferably circular, with the mandrel 2 having a polygonal cross section ( Figure 8 ), a square cross section ( Figures 9 and 10 ) or a triangular cross section ( Figure 11 ) having.
  • the plate 1 and/or the mandrel 2 can be oval shaped.
  • Figure 12 illustrates a further embodiment of the device 10, according to which the mandrel 2 has at least one sealing lamella 24.
  • the sealing plate 24 can be formed from different materials, for example from different copolymers.
  • the mandrel 2 or the body element 32 can be designed in several parts, as in Figure 13 is shown.
  • a first part 33 is arranged on or connected to the outer shape of the body element 32.
  • a second part 34 can be arranged on the outside of the first part 33 or connected to it.
  • the individual parts 32, 33 can be made from different materials and/or have different structures.
  • Figure 14 and Figure 15 show further embodiments of the device 10, according to which the mandrel 2 has at least two individual columns 35.
  • the mandrel 2 has two individual columns 35 and according to Figure 15 the mandrel 2 has three individual columns 35.
  • Figures 16 and 17 illustrate embodiments of the device 10, according to which the mandrel 2 has at least two columns 35 braced together by means of a strut 36.
  • the mandrel 2 has two columns 35 braced together by means of a strut 36 and according to Figure 17 the mandrel 2 has three columns 35 braced together by means of two struts 36.
  • Figures 18 and 19 show further embodiments of the device 10, according to which the mandrel 2 has at least one extension 38 on its outside 37.
  • the mandrel 2 has four extensions 38 on its outside 37 and according to Figure 19 the mandrel 2 has three extensions 38 on its outside 37.
  • the mandrel 2 has four recesses 39 on its outside 37.
  • Figure 21 shows a schematic representation of a further embodiment of the device 10, wherein the plate 1 has at least one secondary plate opening 40, which is formed perpendicular/perpendicular to the base surface of the plate 1, the at least one secondary plate opening 40 being arranged in such a way that it is connected to the base surface of the mandrel 2 or with the base area of the central primary plate opening 5 does not overlap.
  • the plate 1 is square and has a central primary plate opening 5 and four secondary plate openings 40.
  • the plate 1 is square with a side length i that is between 800 mm and 1200 mm, in particular 1000 mm.
  • the primary central plate opening 5 has a diameter k that is between 310 mm and 360 mm, in particular 340 mm.
  • the secondary plate opening can be at a distance j from the respective plate edge, the distance j can be between 100 mm and 200 mm, in particular 150 mm. Furthermore, the respective secondary plate opening 40 has a diameter I that is between 50 mm and 200 mm, in particular 100 mm.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Sewage (AREA)
  • Sheet Holders (AREA)

Claims (16)

  1. Dispositif (10) de fermeture d'une cavité (12) formée dans le sol (11),
    caractérisé en ce que
    le dispositif (10) comprend les éléments suivants :
    - une plaque (1) qui présente une surface qui est au moins deux fois plus grande que la surface d'une ouverture (3) à recouvrir de la cavité (12), la plaque (1) pouvant être supportée sur le sol (11) entourant l'ouverture (3), la plaque (1) présentant une ouverture de plaque primaire centrale (5) d'un diamètre (k) ; et
    - au moins un mandrin (2) ayant une extrémité (D1) opposée à l'ouverture à conserver et une extrémité opposée (D2), le mandrin (2) pouvant être introduit comme élément séparé dans l'ouverture primaire centrale de la plaque de sorte que le mandrin (2) est disposé au centre de la plaque (1) et normalement par rapport au plan de la plaque sur la plaque (1) dans la direction de la gravité et l'extrémité opposée (D2) de l'au moins un mandrin (2) peut être introduite dans la cavité (12) à travers l'ouverture (3), où
    le diamètre (k) de l'ouverture de plaque primaire centrale (5) est inférieur au diamètre du mandrin (2) au niveau de l'extrémité (D1) et supérieur au diamètre du mandrin (2) au niveau de l'extrémité opposée (D2), de sorte qu'une chute du mandrin (2) à travers l'ouverture de plaque primaire centrale (5) est exclue, et dans lequel l'au moins un mandrin (2) est formé d'une seule pièce et présente une longueur dans la direction de la gravité d'au moins 50 cm.
  2. Dispositif (10) selon la revendication 1, dans lequel la plaque (1) est de forme carrée avec une longueur de côté (i) de 800 mm à 1200 mm.
  3. Dispositif selon la revendication 2, dans lequel l'ouverture de plaque primaire centrale a un diamètre (k) de 310 mm à 360 mm.
  4. Dispositif (10) selon l'une quelconque des revendications précédentes, dans lequel l'au moins un mandrin (2) est partiellement ou totalement cylindrique ou conique dans sa forme extérieure.
  5. Dispositif (10) selon l'une des revendications précédentes, dans lequel l'au moins un mandrin (2) présente une longueur dans la direction de la gravité comprise entre 60 cm et 180 cm, de préférence entre 80 cm et 150 cm.
  6. Dispositif (10) selon l'une quelconque des revendications précédentes, dans lequel le mandrin (2) comporte au niveau de son extrémité (D1) un élargissement (46) de diamètre (f), le diamètre (k) de l'ouverture primaire centrale (5) de la plaque étant inférieur au diamètre (f) de l'élargissement au niveau de l'extrémité (D1) du mandrin (2).
  7. Dispositif (10) selon l'une des revendications précédentes, dans lequel l'au moins un mandrin (2) et la plaque (1) sont conçus pour pouvoir être reliés l'un à l'autre par une fermeture à baïonnette ou par des barbes.
  8. Dispositif (10) selon l'une quelconque des revendications précédentes, dans lequel la plaque (1) comprend au moins une ouverture de plaque secondaire (40) formée perpendiculairement à la surface de la plaque (1), l'au moins une ouverture de plaque secondaire (40) étant agencée de manière à ne pas chevaucher l'ouverture de plaque primaire (5) pour l'insertion de l'au moins un mandrin (2) ou la surface de base de l'au moins un mandrin (2).
  9. Dispositif (10) selon l'une quelconque des revendications précédentes, dans lequel l'au moins un mandrin (2) présente une section transversale circulaire ou ovale.
  10. Dispositif (10) selon l'une des revendications précédentes, dans lequel il est prévu un élément de tête (31) qui est relié à l'extrémité (D1) au mandrin (2), de préférence au moyen d'une collerette de présoudage (47).
  11. Dispositif (10) selon l'une des revendications précédentes, dans lequel l'au moins un mandrin (2) présente sur sa face extérieure au moins un prolongement (38) ou un évidement (39).
  12. Procédé de fermeture d'une cavité (12) formée dans le sol (11), en particulier pour la fermeture de forages ou de puits verticaux dans le sol,
    caractérisé en ce que
    un dispositif selon l'une des revendications 1 à 11 est utilisé.
  13. Procédé selon la revendication 12, dans lequel la cavité est un puits filtrant pour le drainage d'une mine à ciel ouvert.
  14. Procédé selon la revendication 12 ou 13, dans lequel, avant l'utilisation du dispositif selon l'une des revendications 1 à 11, on aplanit l'environnement immédiat de l'ouverture de la cavité à fermer.
  15. Utilisation d'un dispositif selon l'une des revendications 1 à 11 pour la fermeture d'une cavité formée dans le sol, en particulier pour la fermeture de forages ou de puits verticaux dans le sol.
  16. Utilisation selon la revendication 15, dans laquelle la cavité est un puits filtrant pour le drainage d'une mine à ciel ouvert.
EP20172065.3A 2019-07-02 2020-04-29 Dispositif de fermeture d'une cavité formée dans le sol Active EP3760830B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE202019103633.8U DE202019103633U1 (de) 2019-07-02 2019-07-02 Vorrichtung zum Verschließen eines im Erdboden ausgebildeten Hohlraums

Publications (2)

Publication Number Publication Date
EP3760830A1 EP3760830A1 (fr) 2021-01-06
EP3760830B1 true EP3760830B1 (fr) 2023-09-13

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EP20172065.3A Active EP3760830B1 (fr) 2019-07-02 2020-04-29 Dispositif de fermeture d'une cavité formée dans le sol

Country Status (3)

Country Link
EP (1) EP3760830B1 (fr)
DE (1) DE202019103633U1 (fr)
PL (1) PL3760830T3 (fr)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4673034A (en) * 1986-01-06 1987-06-16 Hansen Donald J Cased water wells having flexible pad
NL1004421C1 (nl) * 1996-11-04 1997-04-03 Eijkelkamp Agrisearch Equip Bv Deksel voor boorgaten.
FR2844296B1 (fr) * 2002-09-05 2004-11-19 Lefeuvre Sa Coiffe de protection pour puits ou forage
DE202010009507U1 (de) * 2010-06-22 2010-11-04 Rexholm, John Vorrichtung zum Abdichten eines havarierten Austrittsstutzens (II)
US8413583B2 (en) * 2010-07-23 2013-04-09 Samuel T. Sloan Hole covering and locator

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PL3760830T3 (pl) 2024-03-04
EP3760830A1 (fr) 2021-01-06
DE202019103633U1 (de) 2019-09-03

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