EP2692952B1 - Couvercle de logement et procédé destiné à la fabrication d'un couvercle de logement - Google Patents

Couvercle de logement et procédé destiné à la fabrication d'un couvercle de logement Download PDF

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Publication number
EP2692952B1
EP2692952B1 EP20130178572 EP13178572A EP2692952B1 EP 2692952 B1 EP2692952 B1 EP 2692952B1 EP 20130178572 EP20130178572 EP 20130178572 EP 13178572 A EP13178572 A EP 13178572A EP 2692952 B1 EP2692952 B1 EP 2692952B1
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EP
European Patent Office
Prior art keywords
shaft cover
cover according
elements
support structure
rib elements
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.)
Not-in-force
Application number
EP20130178572
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German (de)
English (en)
Other versions
EP2692952A1 (fr
Inventor
Nino Persello
Walter Beer
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.)
Senn AG
Original Assignee
Senn AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Senn AG filed Critical Senn AG
Priority to EP20130178572 priority Critical patent/EP2692952B1/fr
Publication of EP2692952A1 publication Critical patent/EP2692952A1/fr
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Publication of EP2692952B1 publication Critical patent/EP2692952B1/fr
Not-in-force legal-status Critical Current
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D29/00—Independent underground or underwater structures; Retaining walls
    • E02D29/12—Manhole shafts; Other inspection or access chambers; Accessories therefor
    • E02D29/14—Covers for manholes or the like; Frames for covers

Definitions

  • the present invention relates to a manhole cover according to the preamble of claim 1 and to a method for producing a manhole cover.
  • manhole covers are cast iron, either entirely cast iron or segmented on the top surface with a concrete or the like insert. These manhole covers are highly loadable and classifiable in their load design. In any case, such manhole covers are expensive to produce and therefore expensive.
  • the known manhole covers such as in EP-2 431 533 A2 or in DE 299 14 492 U1 are approved for their assigned load classes only as a composite system consisting of a defined iron and concrete casting. While iron casting fundamentally defines the size for covering the clear opening, the concrete takes over the filling in cast iron pockets intended for this purpose and thus forms - at least in part - the lid surface. The division into cast iron bags is made taking into account static and casting aspects. At the same time, after hardening, the concrete adopts an adhesive slip protection on the surface of the manhole cover. Due to the static and standard-related Design, which must be met for approval of the cast iron body, the manufacturing variability in the known manhole covers manufacturing technology limited.
  • the present invention has for its object to provide a manhole cover that meets a broad requirement profile, but at the same time can be easily and cost-effectively manufactured.
  • the present invention initially relates to a manhole cover for covering a manhole opening, wherein the manhole cover comprises a supporting structure.
  • the shaft cover according to the invention is characterized in that the supporting structure comprises a plurality of rib elements, at least one fixing element and at least one longitudinal element, that the rib elements can be fixed by the at least one comb element and that the at least one longitudinal element is connected to a plurality of rib elements.
  • a variant of the manhole cover according to the invention consists of the fact that the rib elements are flat and are oriented in such a way that they are in the Substantially parallel to a force acting on the support structure main load direction.
  • manhole cover according to the invention consist in that at least several rib elements extend from one edge of the manhole opening to an opposite edge.
  • manhole opening is rectangular.
  • manhole cover according to the invention consist in that the at least one longitudinal elements runs transversely to a plurality of rib elements and that the at least one longitudinal element is fixedly connected to a plurality of rib elements.
  • the at least one longitudinal element is a round bar, which is preferably guided through a plurality of rib elements.
  • the support structure is contained in a tub and is firmly connected to this and that the tub with a filling material, preferably a concrete mixture, can be filled.
  • manhole cover according to the invention consist in that a sealing element is provided between a contact surface of the trough and the trough, which allows a water seal and / or a fire seal.
  • manhole cover according to the invention are that a closing system is provided for securely closing the manhole opening.
  • the fixing element is a comb element, through which the rib elements pass, wherein preferably at least two comb elements are provided, which are arranged in the region of bearing surfaces of the supporting structure.
  • the fixing element is a web which connects two adjacent rib elements to a U-profile.
  • the fixing element is a tongue which is perpendicular to a rib member and connected thereto.
  • inventive manhole cover are that the longitudinal elements are arranged closer to a bottom of the manhole cover and that parallel to the longitudinal elements extending reinforcing bars are provided, which are arranged closer to an upper side of the manhole cover.
  • manhole cover according to the invention consist in that the support structure consists of a stainless material, in particular of a stainless steel according to DIN EN 10088-1.
  • manhole cover according to the invention consist in that a surface-flush installation with a roadway is provided.
  • manhole cover according to the invention are that the supporting structure without filling material fulfills a predetermined load standard and can be certified for this purpose.
  • the invention relates to a method for producing a manhole cover according to one of the variants specified above, wherein the method consists in that the support structure is manufactured by means of commercially available semifinished products using sheet metal working techniques.
  • a variant of the inventive method is that the support structure substantially is made by cutting and welding plate material.
  • a support structure 1 for a manhole cover according to the invention is shown in different views. So shows Fig. 1 a side view, Fig. 2 a top view and Fig. 3 a section through the support structure 1 along the cutting plane CC according to Fig. 2 ,
  • the support structure 1 comprises a plurality of parallel and flat rib elements 2, two comb elements 3 and two longitudinal elements 4 in the form of round tubes.
  • the two comb elements 3 are fixing elements for the rib elements 2 and are arranged parallel to each other in an edge region of the rectangular manhole cover, the rib elements 2 passing through the comb elements 3 and extending from one edge of the manhole opening to the opposite edge of the manhole opening.
  • the rib elements 2 are aligned parallel to a main loading direction F, wherein the distance between the rib elements 2 and their dimensions results from the maximum permissible load.
  • the longitudinal elements 4 are - like the comb elements acting as fixing elements 3 - arranged perpendicular to the rib elements 2 and thereby give them comprehensive lateral stability. In the embodiment according to Fig. 1 two longitudinal elements 4 are shown. However, the number of longitudinal elements 4 may be higher within the available space, especially if so due to the maximum expected load conditions should be required.
  • the longitudinal elements 4 do not extend over the entire longitudinal extent of the shaft opening, but end in the region of a frame member 9, in which lifting elements 10 are arranged for lifting the whole support structure 1 and the manhole cover and optionally a locking system 11 for securely closing the shaft opening ,
  • the support structure 1 alone forms the inventive manhole cover.
  • a manhole cover is used to open cover a manhole opening and allows the exchange of air between a manhole cavity and the environment, at the same time a load within the calculated maximum load of the support structure 1 is possible.
  • FIGS. 4 and 5 A further embodiment variant of the manhole cover according to the invention is shown in FIGS FIGS. 4 and 5 shown, where Fig. 4 a top view and Fig. 5 a cross section along the cutting surface DD according to Fig. 4 shows.
  • the support structure 1 is embedded in this embodiment in a trough 6, which makes it possible to pour out the resulting by inserting the support structure 1 in the tub 6 cavities with a filler.
  • a suitable Concrete mixture In particular, a suitable Concrete mixture.
  • the supporting structure 1 is fixedly connected to the trough 6, the joining taking place, for example, by welding, forming or riveting.
  • Fig. 6 and 7 show the same manhole cover as in the 4 and 5 , but in the embodiment according to Fig. 6 and 7 the tub 6 with inserted support structure 1 is completely filled with a filling material. Accordingly, the rib elements 2 as well as the entire support structure 1 are cast, so no longer visible.
  • reinforcing elements 12 are provided in order to ensure the strength and stability of the filling material in areas where no stabilizing rib elements 2 are present.
  • reinforcing elements 12 are provided in order to ensure the strength and stability of the filling material in areas where no stabilizing rib elements 2 are present.
  • the reinforcing elements 12 lead to the desired strength.
  • a sealing element 7 is provided which makes it possible to seal the manhole cover, and indeed a required day-water density and / or a required fire protection can be obtained hereby.
  • a suitable filling material for filling the resulting through the support structure 1 cavities in the tub 6 is to be used.
  • the sealing element 7 is in the entire bearing area, i. arranged around the shaft opening.
  • a sealing material is particularly suitable fire-retardant joint sealing material made of flexible polyurethane foam with acrylate dispersion impregnation.
  • Fig. 8 shows a possible realization of the intermeshing of rib element 2 and comb element, wherein in the in Fig. 8 illustrated embodiment, a first comb element 3 and a second comb element 3 'are available as fixing elements.
  • the first comb element 3 extends over the entire support surface and stabilizes the rib element 3 in a first comb region 13, so that the rib elements 3 do not tilt. Further, the load is transmitted to the rib members 3 on the manhole frame, whereby a possibly existing sealing element leads to a reliable seal. This particular because the manhole frame and thus the design of the tub 6 in the region of the support surface is very flat and thus forms a good sealing surface.
  • the first comb area 13 is also an assembly aid in the production of the supporting structure 1.
  • the second comb region 14 is formed by a second comb element 3 ', which in turn can be a flat iron.
  • the second comb element 3 ' serves for further tilt stabilization and screening of the rib elements 2, wherein the second comb element 3 'is used as an assembly aid in the manufacture of the support structure 1.
  • comb elements 3 and 3 ⁇ Although the in Fig. 8 shown embodiment, two comb elements 3 and 3 ⁇ , it is conceivable that only a single element is used as a comb element. In this case, the first comb region 13 or the second comb region 14 can be realized or both comb regions 13 and 14 can be realized, wherein in the latter case, for example, a composite comb element is realized.
  • the manhole cover according to the invention is produced with commercially available semifinished products using the generally known sheet metal working techniques.
  • sheet metal working techniques In order for shaft openings can be produced inexpensively and flexibly, regardless of the size, in particular automated production techniques are used in an advantageous manner, whereby an economical production can be further increased.
  • the support structure is formed with a defined rib / plug system which is designed with respect to the main loading direction F.
  • the cutting of the structure for the supporting structure consisting of rib elements and comb elements, made of sheets can be done with a laser cutting process.
  • the required accuracy of fit, the nesting of the sheets (rib elements 2 and 3 comb elements) and the round rods (Longitudinal elements 4) is required guaranteed.
  • the manhole cover in variants in the mounting frame during use must cause a satisfactory barrier of daytime water and / or fire.
  • the support structure is sufficient to protect against corrosion. This is achieved, inter alia, that a suitable material is used for the supporting structure 1, for example according to DIN EN 10088-1.
  • the manhole cover according to the invention fulfills the required conditions with regard to optimum longevity and corrosion resistance.
  • the support structure 1 forms with the tub 6, which in turn made of semi-finished products (in particular cut sheet metal parts) a tight manhole cover.
  • the tub 6 is considered as a lost formwork, which also absorbs the filler in addition to the sealing function.
  • the support structure 1 is designed for the respective required load sizes and includes other technical facilities, such as the locking system 11 and the lifting elements 10, which are realized for example as threaded sockets for connecting lifting tools for lifting the manhole cover.
  • the support structure 1 consists - as mentioned - of geometrically and statically determined rib elements and longitudinal elements made of high-strength stainless steel.
  • the rib elements 2 and the longitudinal elements 4 are in a statically defined grid in comb elements 3 as Fixing elements arranged vertically.
  • the predetermined by the grid pitch is dependent on the normalized or required load class, the height of the manhole cover and the clear width of the shaft opening to be covered.
  • the support structure 1 is assembled from the parts, such as rib elements 2, comb elements 3 and longitudinal elements 4 and secured with defined welds. All these parts are designed statically and arranged statically favorable in the direction of loading.
  • the inserted rib elements 2 in the comb elements 3 take over the longitudinal elements 4 together a bridge function to take over the load and the heat transfer.
  • the longitudinal elements 4 are drawn in statically defined number by the neutral fiber of the rib plates in the solder and meet next to the power transmission, torque transfer and heat transfer and the anchoring of the filler.
  • 4 technical devices - such as sensors, lighting, signaling, etc. - can be attached to the longitudinal elements.
  • the support structure 1 can be used as such as a support system for other inputs and structures or as high-strength stainless rake.
  • the manhole cover according to the invention can be manufactured in a technologically simple and economical manner.
  • the size can be independent of an energy and material intensive manufacturing process, such as iron foundries known to be produced.
  • iron foundries known to be produced thus, even small quantities can be produced economically, which also meet high standards. Due to the statically designed arrangement of the rib elements in the support structure high loads, regardless of the site of action, can be recorded.
  • the filling material filled into the tub with supporting structure has no direct static influence on the design of the manhole cover
  • the filling material eg concrete
  • a concrete strength grade can be kept as low as necessary, and therefore economically, in accordance with the application and the required exposure class.
  • an optimal weather, adhesion and fire protection can be realized.
  • Backfilling the manhole cover at the construction site can facilitate transport from the factory to the construction site, as this naturally reduces the transport weight of the manhole cover without filling material.
  • the manhole cover therefore fulfills the tested and certified load class ex works. Due to the consistent use of stainless steel, a concrete cover problem can be ruled out, allowing for a slim manhole cover construction.
  • manhole cover according to the invention can also be carried out under water (for example, also in the sea, ie in the saltwater area).
  • the rib elements are made of a high-strength, tough rust-resistant and acid-resistant steel, which has an identical corrosion behavior as a stainless steel of the "corrosion protection class III / medium". At the same time it must have a low nickel content and a balanced ferritic, austenitic mixed structure.
  • the longitudinal elements and other components should - as far as possible for manufacturing reasons - also the "corrosion protection class III / medium" belong.
  • the feasible large size manhole covers and the use of proven locking systems can be reliably avoided vandalism or similar unauthorized access to the manhole cover.
  • the locking elements on the manhole cover can be designed as a friction lock, screw connection or according to special requirements.
  • the manhole cover according to the invention can be repaired or revised in case of damage, this being independent of whether the supporting structure and / or the filling material has been damaged. Thus, the life is significantly increased.
  • a destruction fracture of the manhole cover, as it can occur in known manhole covers made of cast iron, thermosetting polymer or a polyester concrete is excluded in the inventive manhole cover, wherein as the polyester concrete, the SMC (Sheet Molding Compound) production process or the BMC (Bulk Molding Compound) production process is understood.
  • FIG. 9 shows the manhole cover in a plan view, with which the support structure with the rib elements 2, the longitudinal elements 4 and reinforcing bars 17 can be seen.
  • Fig. 10 making a section along the cutting plane AA through the supporting structure according to Fig. 9 shows, it can be seen, in each case two rib elements 2 are connected by a web 15 which acts as a fixing element, wherein the web 15 and the rib elements 2 form a U-profile.
  • the spacing of belonging to a U-profile rib elements 2 is thus accomplished by the web 15.
  • the spacing between two U-profiles is achieved by connecting elements 16 for connecting the webs 15 to the bottom of the tub 6.
  • connecting elements 16 for example, rivets can be used.
  • a welding of the webs 15 to the bottom of the tub 6 is also conceivable.
  • the connecting elements 16 are provided at regular intervals and centrally in the webs 15. Corresponding provisions are provided in accordance with the webs 16 in the bottom of the tub 6.
  • Fig. 11 shows a section along the sectional plane BB, which thus transversely to the longitudinal elements 4 and the Reinforcing rods 17 runs. Unlike the ones in the Fig. 1 to 8 illustrated variants are the longitudinal elements 4 in the embodiment according to Fig. 11 closer to the bottom of the tub 6 - ie closer to the bottom of the manhole cover - arranged. As a result, loads on the supporting structure are better absorbed by the longitudinal elements 4.
  • the reinforcing bars 17, on the other hand, are closer to the upper side of the supporting structure - i. closer to the top of the manhole cover - arranged and thus ensure that the rib elements 2 are held in position and that a filling material with which the tub 6 is possibly filled, can not be squeezed out.
  • the longitudinal elements 4 may consist of a standard steel in a specific embodiment.
  • the reinforcing rods 17 - which, as has been stated above, located near the top of the manhole cover - is preferably a stainless steel depending on weather conditions to use.
  • Openings 18 in the rib elements 2 visible.
  • the openings 18 are arranged at regular intervals and serve to distribute the introduced filling material within the recessed into the tub 6 support structure. This allows rapid filling with filler material.
  • Fig. 12 shows a net image of a U-profile, which consists of two rib elements 2 and a web 15 as a fixing. Also visible are the openings 18 and prepared bushings for the longitudinal elements 4 and for the reinforcing rods 17. By simply bending by 90 ° of the rib elements 2 with respect to the web 15 creates a U-profile used in the support structure, as it often Fig. 10 used and connected to the bottom of the tub 6 by means of the connecting elements 16.
  • FIG. 13 the tub 6 is shown in perspective.
  • the tub 6 is produced in a variant alone by folding, with the starting position in the Fig. 14 shown network image is used.
  • a stable and self-contained tub is obtained, in which only the U-profiles with inserted longitudinal elements 4 and inserted reinforcing rods 17 must be attached ,
  • FIG. 15 a further embodiment of the inventive manhole cover, which here is a section analogous to Fig. 10 is.
  • the longitudinal elements 4 the reinforcing rods 17 and the rib members 2, the latter having at the lower end a tongue 19 which leads together with the respective rib member in cross-section to an L-shape.
  • the tongue 19 is another form of a fixing element for fixing the respective Rib member.
  • the tongue 19 is welded, for example, with the respective rib member or in one piece by bending - as with the in Fig. 12 shown embodiment has been described - shaped.
  • the tongues 19 are connected to the bottom of the tub 6, which can be done by welding or by riveting.
  • the invention is based on a in the Fig. 1 to 15 illustrated rectangular manhole cover is explained, other forms of manhole covers are conceivable.
  • the present invention is basically not only suitable for covering rectangular shaft openings, but manhole covers can be adapted to any shape.
  • round, trapezoidal or other shapes can be realized using the invention.

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  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Underground Structures, Protecting, Testing And Restoring Foundations (AREA)

Claims (17)

  1. Couvercle de logement pour couvrir une ouverture de logement, le couvercle de logement comprenant une structure porteuse (1), la structure porteuse (1) comprenant plusieurs éléments de nervure (2), au moins un élément de fixation (3, 15, 19) et au moins un élément longitudinal (4), caractérisé en ce que les éléments de nervure (2) peuvent être fixés à travers le au moins un élément fixation (3, 15, 19), et en ce que le au moins un élément longitudinal (4) est raccordé à plusieurs éléments de nervure (2).
  2. Couvercle de logement selon la revendication 1, caractérisé en ce que les éléments de nervure (2) sont réalisés plats et sont orientés de telle sorte qu'ils s'étendent essentiellement parallèlement à une direction de charge principale (F) agissant sur la structure porteuse (1).
  3. Couvercle de logement selon la revendication 1 ou 2, caractérisé en ce qu'au moins plusieurs éléments de nervure (2) s'étendent depuis un bord de l'ouverture de logement jusqu'au bord opposé.
  4. Couvercle de logement selon l'une des revendications 1 à 3, caractérisé en ce que l'ouverture de logement est rectangulaire.
  5. Couvercle de logement selon l'une des revendications 1 à 4, caractérisé en ce que le au moins un élément longitudinal (4) s'étend transversalement à plusieurs éléments de nervure (2) et en ce que le au moins un élément longitudinal (4) est relié fixement à plusieurs éléments de nervure (2).
  6. Couvercle de logement selon l'une des revendications 1 à 5, caractérisé en ce que le au moins un élément longitudinal (4) est une barre ronde qui traverse de préférence plusieurs éléments de nervure (2).
  7. Couvercle de logement selon l'une des revendications 1 à 6, caractérisé en ce que la structure porteuse (1) est renfermée dans une cuve (6) et est raccordée fixement à cette dernière, et en ce que la cuve (6) peut être remplie d'un matériau de remplissage, de préférence d'un mélange de béton.
  8. Couvercle de logement selon la revendication 7, caractérisé en ce qu'il est prévu entre une surface d'appui de la cuve (6) et la cuve (6) un élément d'étanchéité (7) qui permet une étanchéité hydraulique et/ou une étanchéité au feu.
  9. Couvercle de logement selon la revendication 7 ou 8, caractérisé en ce qu'il est prévu un système de fermeture (8) pour une fermeture sécurisée de l'ouverture de logement.
  10. Couvercle de logement selon l'une des revendications 1 à 9, caractérisé en ce que l'élément de fixation est un élément en forme de peigne (3), à travers lequel passent les éléments de nervure (2), de préférence au moins deux éléments en forme de peigne (3) étant prévus, lesquels sont agencés dans la zone des surfaces d'appui de la structure porteuse (1).
  11. Couvercle de logement selon l'une des revendications 1 à 9, caractérisé en ce que l'élément de fixation est une tige (15) qui relie deux éléments de nervure (2) adjacents à un profil en U.
  12. Couvercle de logement selon l'une des revendications 1 à 9, caractérisé en ce que l'élément de fixation est une languette (19) qui s'étend perpendiculairement à un élément de nervure (2) et qui est raccordée à ce dernier.
  13. Couvercle de logement selon l'une des revendications 1 à 12, caractérisé en ce que les éléments longitudinaux (4) sont agencés plus près d'une face inférieure du couvercle de logement et en ce qu'il y a des tiges d'armature (17) s'étendant parallèlement aux éléments longitudinaux (4) qui sont agencées plus près d'une face supérieure du couvercle de logement.
  14. Couvercle de logement selon l'une des revendications 1 à 13, caractérisé en ce que la structure porteuse (1) est composée d'un matériau inoxydable, en particulier d'un acier inoxydable conformément à la norme DIN EN 10088-1.
  15. Couvercle de logement selon l'une des revendications 1 à 14, caractérisé en ce que la structure porteuse (1) répond, sans matériau de remplissage, à une norme de charge déterminée et peut être certifiée à cet effet.
  16. Procédé pour fabriquer un couvercle de logement selon l'une des revendications 1 à 15, caractérisé en ce que la structure porteuse (1) est fabriquée à l'aide de produits semi-finis courants en utilisant des techniques d'usinage de tôles.
  17. Procédé selon la revendication 16, caractérisé en ce que la structure porteuse (1) est fabriquée essentiellement par découpe et par soudage de matériau en forme de plaque.
EP20130178572 2012-07-31 2013-07-30 Couvercle de logement et procédé destiné à la fabrication d'un couvercle de logement Not-in-force EP2692952B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20130178572 EP2692952B1 (fr) 2012-07-31 2013-07-30 Couvercle de logement et procédé destiné à la fabrication d'un couvercle de logement

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP20120178604 EP2692951B1 (fr) 2012-07-31 2012-07-31 Couvercle de logement et procédé destiné à la fabrication d'un couvercle de logement
EP20130178572 EP2692952B1 (fr) 2012-07-31 2013-07-30 Couvercle de logement et procédé destiné à la fabrication d'un couvercle de logement

Publications (2)

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EP2692952A1 EP2692952A1 (fr) 2014-02-05
EP2692952B1 true EP2692952B1 (fr) 2015-03-18

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EP20120178604 Not-in-force EP2692951B1 (fr) 2012-07-31 2012-07-31 Couvercle de logement et procédé destiné à la fabrication d'un couvercle de logement
EP20130178572 Not-in-force EP2692952B1 (fr) 2012-07-31 2013-07-30 Couvercle de logement et procédé destiné à la fabrication d'un couvercle de logement

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CN108487325A (zh) * 2018-04-27 2018-09-04 北京洛科瀚科技有限公司 一种设有结构工艺筋的填充式球墨铸铁井盖

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DE29914492U1 (de) * 1999-08-18 1999-12-16 Heinrich Meier Eisengießerei GmbH & Co KG, 32369 Rahden Scharnierbarer Straßenaufsatz
DE102010037641A1 (de) 2010-09-17 2012-03-22 Thomas Lorenz Industrietechnik Gmbh & Co. Kg Schachtdeckel
DE202011000182U1 (de) * 2011-01-25 2012-01-30 Buderus Kanalguss Gmbh Straßenaufsatz

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EP2692951B1 (fr) 2015-05-06
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