EP0341179A1 - Casting provided with a destructible part - Google Patents

Casting provided with a destructible part Download PDF

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Publication number
EP0341179A1
EP0341179A1 EP89470008A EP89470008A EP0341179A1 EP 0341179 A1 EP0341179 A1 EP 0341179A1 EP 89470008 A EP89470008 A EP 89470008A EP 89470008 A EP89470008 A EP 89470008A EP 0341179 A1 EP0341179 A1 EP 0341179A1
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EP
European Patent Office
Prior art keywords
zone
resistant
section
patch
wall
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP89470008A
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German (de)
French (fr)
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EP0341179B1 (en
Inventor
Jean-Claude Hauer
Alain Percebois
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Pont a Mousson SA
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Pont a Mousson SA
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Publication date
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Priority to AT89470008T priority Critical patent/ATE70870T1/en
Publication of EP0341179A1 publication Critical patent/EP0341179A1/en
Application granted granted Critical
Publication of EP0341179B1 publication Critical patent/EP0341179B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D31/00—Cutting-off surplus material, e.g. gates; Cleaning and working on castings

Definitions

  • the present invention relates to foundry pieces of the type comprising a body having a wall provided with at least one pellet knockout so as to release an opening through said wall in place of said pellet.
  • the present invention aims to provide a foundry part of the type defined above better meeting those previously known to the requirements of practice, in particular in that it has a knockout pellet having on the one hand, the characteristic of being able to be released by percussion for sure, and on the other hand, the characteristic of being able to stay in place for sure.
  • the effort required to release the pellet can be known and can be calibrated to be identical on all the casting parts to be cast.
  • the production of the parts according to the invention is very simple, inexpensive, and allows parts to be obtained without waste, with great reliability and good quality.
  • the invention essentially provides a foundry piece of the type defined above, characterized in that the pellet is secured to a resistant zone of the wall of the body by means of a frangible zone surrounded by said zone. resistant, the section of this frangible zone connecting the patch to the resistant zone being substantially reduced compared to the section of this resistant zone and compared to the section of said pastille, and in that the pastille is entirely situated outside the space defined by the two planes P1 and P2 between which the resistant zone is inscribed.
  • the frangible zone is a hollow cylinder or a hollow prism and the pellet is respectively substantially cylindrical or prismatic.
  • the part is made of cast iron.
  • Figures 1, 2 and 3 show a foundry piece 1 comprising a body having a wall 2 provided at least one pad 3, knocked out by percussion so as to release an opening 4 through said wall 2 in place of said pad 3.
  • the pad 3 is secured to a resistant zone 5 of the wall 2 of the body 1 by means of a frangible zone 6 surrounded by said resistant zone 5.
  • This frangible zone 6 that is to say the section connecting the patch 3 to the resistant zone 5 is substantially reduced compared to the section of the resistant zone 5 and, compared to the section of the patch herself.
  • the patch 3 is entirely located outside the space defined by the two substantially flat surfaces P1 and P2 between which is the resistant zone 5.
  • the face 11 of the patch located on the side of the wall 2 is found at a distance h from the surface P2, of value greater than or equal to 0, whatever the mold closing faults.
  • FIG. 4 in which the same reference numerals designate the same members as in FIG. 1, shows a foundry part 1 comprising two knockouts 3, this part being represented inside its manufacturing mold 15.
  • the mold 15 comprises a lower half-part 16 and an upper half-part 17, for example removable by means of handles 18.
  • Inlets 19 are provided in the mold for casting the cast iron of the foundry piece 1.
  • the two parts of mold 16 and 17 are shaped to give the desired shape to the foundry part 1.
  • the frangible zone 6 of each patch 3 has an external face 20 and an internal face 22, these two external faces 20 and internal 22 having a draft, or surface configuration, suitable for promoting the demoulding.
  • the foundry part has, on the side of the external face 20 of the frangible zone 6, a part in relief with a conical wall, and, on the side of the internal face 22 of the frangible zone 6, a hollow part with a conical wall, the faces 20 and 22 being parallel at least approximately.
  • the section of the frangible zone 6 remains constant, and of this fact, the properties provided by this frangible zone (possibility of releasing the pellet by percussion for sure or possibility of considering the pellet in place as an integral part of the part) remain constant.
  • FIGS. 5 and 6 in which the same reference numerals designate the same members as in FIG. 1, it can be seen that a decentering of the two half-parts of the mold does not not modify the value of the section of the frangible zone 6 whose properties remain constant.
  • the reliability of the ventilable foundry part is greater than the reliability of ventilable foundry parts known to date, and this because of the possibilities of the patch which either is released "reliably” or is left in place "also reliably".

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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)
  • Mechanical Engineering (AREA)
  • Mold Materials And Core Materials (AREA)
  • Massaging Devices (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Dental Preparations (AREA)
  • Control Of Vending Devices And Auxiliary Devices For Vending Devices (AREA)
  • Braking Arrangements (AREA)
  • Piles And Underground Anchors (AREA)
  • Medicines That Contain Protein Lipid Enzymes And Other Medicines (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)
  • Adornments (AREA)
  • Peptides Or Proteins (AREA)
  • Toys (AREA)
  • Dental Prosthetics (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Thermistors And Varistors (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)

Abstract

The invention relates to a casting (1) comprising a body having a wall (2) equipped with at least one slug (3) breakable by knocking so as to expose an orifice (4) through said wall (2) in place of said slug (3). The slug (3) is fixed to a resistant zone (5) of the wall (2) of the body by means of a breakable zone (6) surrounded by said resistant zone (5), the cross-section of this breakable zone (6), which connects the slug (3) to the resistant zone, being substantially reduced in relation to the cross-section of this resistant zone (5) and in relation to the cross-section of the slug (3). Moreover, the slug (3) is located completely outside the space defined by the two planes P1 and P2 between which the resistant zone (5) is inscribed. <IMAGE>

Description

La présente invention concerne les pièces de fonderie du type comportant un corps ayant une paroi munie d'au moins une pastille défonçable par percussion de façon à dégager une ouverture au travers de ladite paroi à la place de ladite pastille.The present invention relates to foundry pieces of the type comprising a body having a wall provided with at least one pellet knockout so as to release an opening through said wall in place of said pellet.

Elle trouve une application particulièrement importante, bien que non exclusive, dans le domaine des pièces métalliques en fonte, et plus particulièrement des regards de chaussée destinés à obturer des ouver­tures donnant accès à une conduite, un égout ou une galerie.It finds a particularly important, although not exclusive, application in the field of metal cast iron parts, and more particularly of manhole covers intended to close openings giving access to a pipe, a sewer or a gallery.

Les règlementations en matière de voirie sont très différentes selon les pays et/ou selon les villes d'un même pays. Certaines agglomérations exigent, en effet, des regards de chaussée ventilés (munis de trous d'aération) alors que d'autres veulent des regards her­métiques. Très tôt, les fondeurs, obligés de prévoir ces deux types de regards de chaussée ont donc conçu des regards comportant des pastilles défonçables à la demande, et agencés pour constituer des regards ventilés (pastilles défonçables dégagées) ou des regards hermétiques (pastilles défonçables en place) ; une telle disposition permet donc, avec un même moule, de réaliser les deux types de regards.Road regulations are very different depending on the country and / or the city of the same country. Certain agglomerations require, in fact, ventilated manholes (provided with ventilation holes) while others want hermetic manholes. Very early on, founders, obliged to provide these two types of manhole covers, designed manholes comprising knockouts which can be knocked down on demand, and designed to constitute ventilated manholes (knockout knockouts released) or airtight manholes (knockout knockouts in place ); such an arrangement therefore makes it possible, with the same mold, to produce the two types of manholes.

De tels regards à pastilles défonçables sont à ce jour réalisés selon la technique consistant à prévoir une gorge annulaire laissant subsister, dans l'épaisseur de la paroi en fonte et sur le pourtour de la pastille à casser, une zone frangible. Or l' épaisseur de cette zone frangible ne peut pas être maîtrisée de façon satisfaisante par la technique utilisée, dans laquelle on réalise un moule en deux parties, se refermant l'une sur l'autre ; les tolérances dimensionnelles inhérentes d'une part à la fabrication des deux parties du moule et d'autre part au positionnement relatif des deux parties du moule peuvent entraîner des variations importantes d'épaisseur de la zone frangible, donc des variations importantes de la section de matière à casser.To date, these knockouts with knockouts have been produced using the technique of providing an annular groove leaving a frangible zone in the thickness of the cast iron wall and around the periphery of the pellet to be broken. However, the thickness of this frangible zone cannot be satisfactorily controlled by the technique used, in which a mold is produced in two parts, closing over one another; the dimensional tolerances inherent on the one hand in the manufacture of the two parts of the mold and on the other hand the relative positioning of the two parts of the mold can cause significant variations in thickness of the frangible zone, therefore significant variations in the section of material to be broken.

Il existe un risque important d'obtenir, après coulage de la fonte, un regard dont la pastille ne peut pas être défonçée (épaisseur de la zone frangible trop importante) ce qui interdit la fabrication de regards ventilés, ou au contraire un regard dont la pastille ne présente pas la solidité requise (épaisseur de la zone frangible trop faible), ce qui interdit la fabrication de regards hermétiques.There is a significant risk of obtaining, after pouring of the cast iron, a manhole whose pellet cannot be knocked out (thickness of the frangible zone too large) which prohibits the production of ventilated manholes, or on the contrary a manhole whose tablet does not have the required solidity (thickness of the frangible zone too low), which prohibits the manufacture of airtight manholes.

La présente invention vise à fournir une pièce de fonderie du type ci-dessus défini répondant mieux que celles antérieurement connues aux exigences de la pratique, notamment en ce qu'elle présente une pastille défonçable présentant d'une part, la caractéristique de pouvoir être dégagée par percussion à coup sûr, et d'autre part, la caractéristique de pouvoir rester en place à coup sûr.The present invention aims to provide a foundry part of the type defined above better meeting those previously known to the requirements of practice, in particular in that it has a knockout pellet having on the one hand, the characteristic of being able to be released by percussion for sure, and on the other hand, the characteristic of being able to stay in place for sure.

Par ailleurs, l'effort à fournir pour dégager la pastille peut être connu et peut être calibré pour être identique sur toutes les pièces de fonderie à couler.Furthermore, the effort required to release the pellet can be known and can be calibrated to be identical on all the casting parts to be cast.

La fabrication des pièces selon l'invention est d'une mise en oeuvre très simple, peu coûteuse, et permet d'obtenir des pièces sans rebut, avec une grande fiabilité et une bonne qualité.The production of the parts according to the invention is very simple, inexpensive, and allows parts to be obtained without waste, with great reliability and good quality.

Dans ce but l'invention propose essentiellement une pièce de fonderie du type ci-dessus défini, caractérisée en ce que la pastille est solidaire d'une zone résistante de la paroi du corps par l'intermédiaire d'une zone frangible entourée par ladite zone résis­tante, la section de cette zone frangible reliant la pastille à la zone résistante étant sensiblement amoindrie par rapport à la section de cette zone résistante et par rapport à la section de ladite pastille, et en ce que la pastille est entièrement située à l'extérieur de l'espace défini par les deux plans P₁ et P₂ entre lesquels s'inscrit la zone résistante.For this purpose, the invention essentially provides a foundry piece of the type defined above, characterized in that the pellet is secured to a resistant zone of the wall of the body by means of a frangible zone surrounded by said zone. resistant, the section of this frangible zone connecting the patch to the resistant zone being substantially reduced compared to the section of this resistant zone and compared to the section of said pastille, and in that the pastille is entirely situated outside the space defined by the two planes P₁ and P₂ between which the resistant zone is inscribed.

Dans des modes avantageux de réalisation, on a recours en outre à l'une et/ou à l'autre des dispositions suivantes :
- La zone frangible est un cylindre creux ou un prisme creux et la pastille est respectivement sensi­blement cylindrique ou prismatique.
- La pièce est réalisée en fonte.In advantageous embodiments, recourse is also had to one and / or the other of the following arrangements:
- The frangible zone is a hollow cylinder or a hollow prism and the pellet is respectively substantially cylindrical or prismatic.
- The part is made of cast iron.

L'invention sera mieux comprise à la lecture de la description qui suit des modes particuliers de réalisation, donnés à titre d'exemple non limitatif.The invention will be better understood on reading the description which follows of the particular embodiments, given by way of nonlimiting example.

La description se réfère aux dessins qui l'accompagnent sur lesquels :

  • - la figure 1 est une coupe en élévation d'une pièce de fonderie selon l'invention, munie d'une pastille cylindrique défonçable par percussion ;
  • - la figure 2 est une coupe suivant II-II figure 1 ;
  • - la figure 3 est une coupe d'une autre pièce de fonderie, selon l'invention, munie d'une pastille prismatique ;
  • - la figure 4, montre, en coupe dans les mêmes conditions que sur la figure 1, une pièce de fonderie selon l'invention, munie de deux pastilles, ainsi que le moule dans lequel elle a été coulée ;
  • - la figure 5, montre par une vue agrandie en coupe, en élévation, une partie de la pièce de fonderie de la figure 4, réalisée dans le cas d'un défaut de centrage de son moule de fabrication ;
  • - la figure 6 est une coupe suivant VI-VI figure 5.
The description refers to the accompanying drawings in which:
  • - Figure 1 is a sectional elevation of a foundry piece according to the invention, provided with a cylindrical pellet knockable by percussion;
  • - Figure 2 is a section along II-II Figure 1;
  • - Figure 3 is a section through another foundry piece, according to the invention, provided with a prismatic pellet;
  • - Figure 4 shows, in section under the same conditions as in Figure 1, a foundry piece according to the invention, provided with two pellets, as well as the mold in which it was cast;
  • - Figure 5 , shows an enlarged sectional view, in elevation, part of the foundry part of Figure 4, produced in the case of a centering defect of its manufacturing mold;
  • - Figure 6 is a section along VI-VI Figure 5.

Les figures 1, 2 et 3 montrent une pièce de fonderie 1 comportant un corps ayant une paroi 2 munie d'au moins une pastille 3, défonçable par percussion de façon à dégager une ouverture 4 au travers de ladite paroi 2 à la place de ladite pastille 3. La pastille 3 est solidaire d'une zone résistante 5 de la paroi 2 du corps 1 par l'intermédiaire d'une zone frangible 6 entourée par ladite zone résistante 5.Figures 1, 2 and 3 show a foundry piece 1 comprising a body having a wall 2 provided at least one pad 3, knocked out by percussion so as to release an opening 4 through said wall 2 in place of said pad 3. The pad 3 is secured to a resistant zone 5 of the wall 2 of the body 1 by means of a frangible zone 6 surrounded by said resistant zone 5.

La section de cette zone frangible 6, c'est-à-­dire la section reliant la pastille 3 à la zone résistante 5, est sensiblement amoindrie par rapport à la section de la zone résistante 5 et, par rapport à la section de la pastille elle-même.The section of this frangible zone 6, that is to say the section connecting the patch 3 to the resistant zone 5, is substantially reduced compared to the section of the resistant zone 5 and, compared to the section of the patch herself.

La pastille 3 est entièrement située à l'extérieur de l'espace défini par les deux surfaces sensiblement planes P₁ et P₂ entre lesquelles se trouve la zone résistante 5. Autrement dit, la face 11 de la pastille située du côté de la paroi 2 se trouve à une distance h de la surface P₂, de valeur supérieure ou égale à 0, quels que soient les défauts de fermeture du moule.The patch 3 is entirely located outside the space defined by the two substantially flat surfaces P₁ and P₂ between which is the resistant zone 5. In other words, the face 11 of the patch located on the side of the wall 2 is found at a distance h from the surface P₂, of value greater than or equal to 0, whatever the mold closing faults.

La figure 4, sur laquelle les mêmes chiffres de référence désignent les mêmes organes que sur la figure 1, montre une pièce de fonderie 1 comportant deux pastilles défonçables 3, cette pièce étant représentée à l'intérieur de son moule de fabrication 15. Le moule 15 comporte une demi-partie inférieure 16 et une demi-­partie supérieure 17, par exemple amovible par l'inter­médiaire de poignées 18. Des entrées 19 sont ménagées dans le moule pour couler la fonte de la pièce de fonderie 1. Les deux parties de moule 16 et 17 sont conformées pour donner la forme voulue à la pièce de fonderie 1.FIG. 4, in which the same reference numerals designate the same members as in FIG. 1, shows a foundry part 1 comprising two knockouts 3, this part being represented inside its manufacturing mold 15. The mold 15 comprises a lower half-part 16 and an upper half-part 17, for example removable by means of handles 18. Inlets 19 are provided in the mold for casting the cast iron of the foundry piece 1. The two parts of mold 16 and 17 are shaped to give the desired shape to the foundry part 1.

La zone frangible 6 de chaque pastille 3 présente une face externe 20 et une face interne 22, ces deux faces externe 20 et interne 22 présentant une dépouille, ou configuration surfacique, propre à favoriser le démoulage. Dans le cas d'une pastille sensiblement cylindrique par exemple, la pièce de fonderie présente, du côté de la face externe 20 de la zone frangible 6, une partie en relief à paroi conique, et, du côté de la face interne 22 de la zone frangible 6, une partie en creux à paroi conique, les faces 20 et 22 étant parallèles au moins approximativement.The frangible zone 6 of each patch 3 has an external face 20 and an internal face 22, these two external faces 20 and internal 22 having a draft, or surface configuration, suitable for promoting the demoulding. In the case of a substantially cylindrical pellet for example, the foundry part has, on the side of the external face 20 of the frangible zone 6, a part in relief with a conical wall, and, on the side of the internal face 22 of the frangible zone 6, a hollow part with a conical wall, the faces 20 and 22 being parallel at least approximately.

Grâce à l'invention on conçoit que, tant que l'imprécision dans la confection du moule est inférieure à la grandeur h, dans le sens perpendiculaire au plan de la pièce de fonderie, la section de la zone frangible 6 demeure constante, et de ce fait, les propriétés procurées par cette zone frangible (possibilité de dégager la pastille par percussion à coup sûr ou possibilité de considérer la pastille en place comme partie intégrante de la pièce) demeurent constantes.Thanks to the invention, it is understood that, as long as the imprecision in the making of the mold is less than the quantity h , in the direction perpendicular to the plane of the casting, the section of the frangible zone 6 remains constant, and of this fact, the properties provided by this frangible zone (possibility of releasing the pellet by percussion for sure or possibility of considering the pellet in place as an integral part of the part) remain constant.

Toujours grâce à l'invention, et comme on peut le constater sur les figures 5 et 6 sur lesquelles les mêmes chiffres de référence désignent les mêmes organes que sur la figure 1, on conçoit qu'un décentrage des deux demi-parties du moule ne modifie pas la valeur de la section de la zone frangible 6 dont les propriétés demeurent constantes.Still thanks to the invention, and as can be seen in FIGS. 5 and 6 in which the same reference numerals designate the same members as in FIG. 1, it can be seen that a decentering of the two half-parts of the mold does not not modify the value of the section of the frangible zone 6 whose properties remain constant.

Compte tenu du fait que les propriétés de la zone frangible 6 ne sont altérées ni par une imprécision dans la confection du moule, ni par un décentrage de ses deux demi-parties constitutives, la fiabilité de la pièce de fonderie ventilable, que ce soit dans le cas où on doit obtenir une pièce "ventilée" ou dans le cas où on doit obtenir une pièce "hermétique", est plus grande que la fiabilité des pièces de fonderie ventilables connues jusqu'à ce jour, et ce en raison des possibilités de la pastille qui, soit est dégagée "d'une façon fiable", soit est laissée en place "également d'une façon fiable".Given the fact that the properties of the frangible zone 6 are not altered either by an imprecision in the making of the mold, or by a decentering of its two constituent half-parts, the reliability of the ventilable foundry part, whether in the case where one must obtain a "ventilated" part or in the case where one must obtain a "hermetic" part, is greater than the reliability of ventilable foundry parts known to date, and this because of the possibilities of the patch which either is released "reliably" or is left in place "also reliably".

Comme il va de soi et comme il résulte d'ailleurs de ce qui précède, l'invention ne se limite nullement aux modes de réalisation plus spécifiquement décrits ; elle en embrasse au contraire toutes les variantes.As it goes without saying and as it results from elsewhere from the above, the invention is in no way limited to the embodiments more specifically described; on the contrary, it embraces all its variants.

Claims (5)

1. Pièce de fonderie (1) comportant un corps ayant une paroi (2) munie d'au moins une pastille (3) défonçable par percussion de façon à dégager une ouverture (4) au travers de ladite paroi (2) à la place de ladite pastille (3), caractérisée en ce que la pastille (3) est solidaire d'une zone résistante (5) de la paroi (2) du corps par l'intermédiaire d'une zone frangible (6) entourée par ladite zone résistante (5), la section de cette zone frangible (6), reliant la pastille (3) à la zone résistante, étant sensiblement amoindrie par rapport à la section de cette zone résistante (5) et par rapport à la section de la pastille (3), et en ce que la pastille (3) est entièrement située à l'extérieur de l'espace défini par les deux plans P₁ et P₂ entre lesquels s'inscrit la zone résistante (5).1. Foundry piece (1) comprising a body having a wall (2) provided with at least one pellet (3) knocked out by percussion so as to release an opening (4) through said wall (2) instead of said patch (3), characterized in that the patch (3) is integral with a resistant zone (5) of the wall (2) of the body by means of a frangible zone (6) surrounded by said zone resistant (5), the section of this frangible zone (6), connecting the patch (3) to the resistant zone, being appreciably lessened with respect to the section of this resistant zone (5) and with respect to the section of the patch (3), and in that the patch (3) is entirely situated outside the space defined by the two planes P₁ and P₂ between which the resistant zone (5) is inscribed. 2. Pièce de fonderie selon la revendication 1, caractérisée en ce que la zone frangible (6) est un cylindre creux et la pastille (3) est sensiblement cylindrique.2. Foundry part according to claim 1, characterized in that the frangible zone (6) is a hollow cylinder and the pellet (3) is substantially cylindrical. 3. Pièce de fonderie selon la revendication 1, caractérisée en ce que la zone frangible (6) est un prisme creux et la pastille est sensiblement pris­matique.3. Foundry part according to claim 1, characterized in that the frangible zone (6) is a hollow prism and the pellet is substantially prismatic. 4. Pièce de fonderie selon la revendication 1, caractérisée en ce que la zone frangible (6) présente une face externe (20) et une face interne (22), ces deux faces externe (20) et interne (22) étant coniques et parallèles, au moins approximativement, de manière à favoriser le démoulage.4. Foundry part according to claim 1, characterized in that the frangible zone (6) has an external face (20) and an internal face (22), these two external (20) and internal (22) faces being conical and parallel, at least approximately, so as to favor demolding. 5. Pièce de fonderie selon l'une quelconque des revendications précédentes, caractérisée en ce que la pièce est un regard de chaussée.5. Foundry part according to any one of the preceding claims, characterized in that the part is a manhole cover.
EP89470008A 1988-05-05 1989-05-03 Casting provided with a destructible part Expired - Lifetime EP0341179B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89470008T ATE70870T1 (en) 1988-05-05 1989-05-03 CASTING PROVIDED WITH A DESTRUCTIVE PART.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8806047 1988-05-05
FR8806047A FR2630942B1 (en) 1988-05-05 1988-05-05 FOUNDRY PIECE PROVIDED WITH A BREAKABLE PELLET

Publications (2)

Publication Number Publication Date
EP0341179A1 true EP0341179A1 (en) 1989-11-08
EP0341179B1 EP0341179B1 (en) 1991-12-27

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EP89470008A Expired - Lifetime EP0341179B1 (en) 1988-05-05 1989-05-03 Casting provided with a destructible part

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EP (1) EP0341179B1 (en)
AT (1) ATE70870T1 (en)
DE (1) DE68900596D1 (en)
DK (1) DK172195B1 (en)
ES (1) ES2024392T3 (en)
FR (1) FR2630942B1 (en)
GR (1) GR3003446T3 (en)
NO (1) NO170200C (en)
PT (1) PT90442B (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT234061B (en) * 1962-08-20 1964-06-10 Kaiserslautern Guss Armatur Cover-like closure body made of cast iron for manhole openings
FR2414284A7 (en) * 1978-01-07 1979-08-03 Passavant Werke Dished circular manhole cover - has concrete filled cast iron body with vertical sides and uniform wall thickness
EP0050928A1 (en) * 1980-10-27 1982-05-05 The Dover Engineering Works Limited Manufacturing manhole cover frames

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT234061B (en) * 1962-08-20 1964-06-10 Kaiserslautern Guss Armatur Cover-like closure body made of cast iron for manhole openings
FR2414284A7 (en) * 1978-01-07 1979-08-03 Passavant Werke Dished circular manhole cover - has concrete filled cast iron body with vertical sides and uniform wall thickness
EP0050928A1 (en) * 1980-10-27 1982-05-05 The Dover Engineering Works Limited Manufacturing manhole cover frames

Also Published As

Publication number Publication date
DK214789A (en) 1989-11-06
EP0341179B1 (en) 1991-12-27
NO891807D0 (en) 1989-05-02
GR3003446T3 (en) 1993-02-17
ES2024392T3 (en) 1992-08-16
NO170200B (en) 1992-06-15
DE68900596D1 (en) 1992-02-06
ES2024392A4 (en) 1992-03-01
NO170200C (en) 1992-09-23
DK172195B1 (en) 1997-12-22
DK214789D0 (en) 1989-05-02
PT90442A (en) 1989-11-30
PT90442B (en) 1994-05-31
NO891807L (en) 1989-11-06
ATE70870T1 (en) 1992-01-15
FR2630942A1 (en) 1989-11-10
FR2630942B1 (en) 1991-04-05

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