EP0083007A1 - Manhole cover - Google Patents

Manhole cover Download PDF

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Publication number
EP0083007A1
EP0083007A1 EP82111515A EP82111515A EP0083007A1 EP 0083007 A1 EP0083007 A1 EP 0083007A1 EP 82111515 A EP82111515 A EP 82111515A EP 82111515 A EP82111515 A EP 82111515A EP 0083007 A1 EP0083007 A1 EP 0083007A1
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EP
European Patent Office
Prior art keywords
frame
manhole cover
counter
ramps
cover according
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.)
Withdrawn
Application number
EP82111515A
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German (de)
French (fr)
Inventor
Jean-Claude Hauer
Jacques Oger
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.)
Pont a Mousson SA
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Pont a Mousson SA
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Publication date
Application filed by Pont a Mousson SA filed Critical Pont a Mousson SA
Publication of EP0083007A1 publication Critical patent/EP0083007A1/en
Withdrawn legal-status Critical Current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

Definitions

  • the present invention relates to a circular manhole cover, of the type comprising a frame and a buffer provided on their periphery with a series of surfaces associated in pairs, including three bearing surfaces and three counter-bearing surfaces interposed between these bearing surfaces.
  • the object of the invention is to provide a look allowing easy and rapid installation of the tampon.
  • the subject of the invention is a manhole cover of the aforementioned type, characterized in that the bearing surfaces of each part of the manhole comprise two ramps inclined circumferentially in the same direction and a flat support.
  • the against-support frame surfaces include a first surface vertical between the two ramps, and two descending surfaces that flank the flat support and which follow with a slightly larger diameter the trajectory followed by the associated surfaces of the tampon during the positioning of the latter.
  • rotation is stopped by the vertical abutment surface, which returns the pad to the other two abutment surfaces.
  • the pad is self-locked when, according to another characteristic of the invention, the descending counter-bearing surfaces are overhanging.
  • the circular gaze shown in Figs. l to 4 consists of two pieces of rough ductile iron foundry, namely a frame l intended to be sealed in a pavement or sidewalk covering and a removable buffer lA.
  • the frame 1 (Fig. 1 and 2), which is moldable without a core, comprises an annular lower sole 2 on the inner periphery of which protrudes upwards an approximately cylindrical skirt 3.
  • Vertical stiffening ribs 4 extend between the sole 2 and the skirt 3. Inside this skirt protrude six surfaces regularly distributed angularly: a planar support 5, a vertical abutment 6 against diametrically opposed to this support last, two helical support ramps 7 framing the stop 6 and two counter-supports 8.
  • an internal retaining collar 9 extends over most of the periphery of the skirt 3, a little below the level of the reliefs 5 to 8.
  • the plane support 5 and the two ramps 7 have approximately the same circumferential extent; the two ramps are inclined by the same angle in the same circumferential direction, which is in this example clockwise, and pass from one level located above support 5 at a level located below this support.
  • the normal N to the stop 6 is inclined at an acute angle ⁇ relative to the corresponding radius of the frame, clockwise.
  • Each counter-support 8 has an overhanging active surface 10 which has a frustoconical shape with the same axis as the frame and which descends clockwise along a slope roughly equal to half the slope of the ramps 7.
  • the pad 1A comprises an upper planar web 11 provided near its periphery with a lower skirt 12 and, inside the latter, of a stiffening rib 13.
  • the diameter of the web 11 is a little less than the inside diameter of the skirt 3 of the frame.
  • the ramps 7A and 7 are exactly conjugate, but the inclination ⁇ upwards of the faces 10A of the counter-supports 8A is a few degrees greater than the inclination ⁇ down of the faces 10 of the counter-supports 8 (Fig. 7).
  • the veil 11 is notched at the right of the counter-supports 8A to allow a coreless molding of the pad.
  • FIGS. 5 and 6 constitute developed diagrams of the region between the plane support 5 and the ramp 7 which precedes it (Fig. 5) and that between the two ramps 7 (Fig. 6).
  • the buffer is placed at an angle so that its flat surface 5A rests on the plane support 5 of the frame., At point Al in FIG. 5.
  • the ramps 7A are then supported on the upper part of the ramps 7, at B1, and the surfaces 10A are located near the counter-supports 10 (points Cl and Dl), but without contact with them.
  • the slope of the ramps 7 and 7A is chosen to be strong enough so that, under the effect of its own weight and taking into account the presence of various particles on the surfaces 5 and 7, the buffer itself initiates a helical type movement descending, possibly initiated by a pickaxe.
  • the ramps 7A slide on the ramps 7, following the path Bl-B2-B3, and the support 5A slides simultaneously on the support 5 along A1-A2-A3.
  • This is permitted by the aforementioned slope of the counter-supports 10, thanks to which the surfaces 10A of the buffer run along these counter-supports without touching them, as represented by the pairs of points C2-D2 and C3-D3:
  • the buffer is locked :; that is to say that it cannot be removed by simple lifting but requires for this a reverse helical movement, which is obtained by acting a tool in a notch 17 of the web 11 (Fig. 4).
  • the buffer 1A is thus self-closing, self-centering, self-locking and stable.
  • its first bias setting can be done very easily, without great precision being necessary, by lateral displacement of the pad on the edge of the frame.

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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)
  • Vibration Dampers (AREA)
  • Underground Structures, Protecting, Testing And Restoring Foundations (AREA)

Abstract

On the periphery of the frame (1) of the manhole there are three bearing surfaces which are at 120 DEG relative to one another and of which two are ramps (7) inclined circumferentially in the same direction and one is a plane rest (5). Three interposed counter-rests consist of an oblique vertical stop (6) located between the two ramps and of two radial overhanging downward counter-rests (10). The cover has six respectively associated surfaces. It is placed askew, plane rest on plane rest, then it descends helically, encounters the stop (6) and is returned up against the downward counter-rests of the frame. <IMAGE>

Description

La présente invention est relative à un regard de chaussée circulaire, du type comprenant un cadre et un tampon pourvus sur leur périphérie d'une série de surfaces associées deux à deux, dont trois surfaces d'appui et trois surfaces de contre-appui intercalées entre ces surfaces d'appui.The present invention relates to a circular manhole cover, of the type comprising a frame and a buffer provided on their periphery with a series of surfaces associated in pairs, including three bearing surfaces and three counter-bearing surfaces interposed between these bearing surfaces.

Diverses solutions ont été proposées pour assurer avec de tels regards une mise en place automatique du tampon sous l'effet de la gravité par un mouvement à peu près hélicoïdal, cette mise en place étant accompagnée d'un auto-verrouillage du tampon. Dans chaque cas, le cadre et le tampon présentent une symétrie ternaire qui impose à l'opérateur d'amener le tampon coa- xialement au cadre avant de le poser. Du fait du poids des tampons, cette opération est relativement difficile et penible.Various solutions have been proposed to ensure with such looks an automatic positioning of the buffer under the effect of gravity by a roughly helical movement, this positioning being accompanied by a self-locking of the buffer. In each case, the frame and the pad have a ternary symmetry which requires the operator to bring the pad coaxially to the frame before placing it. Due to the weight of the pads, this operation is relatively difficult and painful.

L'invention a pour but de fournir un regard permettant une pose facile et rapide du tampon.The object of the invention is to provide a look allowing easy and rapid installation of the tampon.

A cet effet, l'invention a pour objet un regard de chaussée du type précité, caractérisé en ce que les surfaces d'appui de chaque pièce du regard comprennent deux rampes inclinées circonférentiellement dans le même sens et un appui plan.To this end, the subject of the invention is a manhole cover of the aforementioned type, characterized in that the bearing surfaces of each part of the manhole comprise two ramps inclined circumferentially in the same direction and a flat support.

Dans un mode de réalisation très avantageux qui garantit une libre rotation du tampon au cours de sa mise en place, les surfaces de contre-appui du cadre comprennent une première surface' verticale située entre les deux rampes, et deux surfaces descendantes qui encadrent l'appui plan et qui suivent avec un diamètre légèrement supérieur la trajectoire suivie par les surfaces associées du tampon lors de la mise en place de ce dernier. Ainsi, la rotation est stoppée par la surface de contre-appui verticale, laquelle renvoie le tampon vers les deux autres surfaces de contre-appui.In one embodiment very advantageous that ensures free rotation of the pad during its introduction, the against-support frame surfaces include a first surface vertical between the two ramps, and two descending surfaces that flank the flat support and which follow with a slightly larger diameter the trajectory followed by the associated surfaces of the tampon during the positioning of the latter. Thus, rotation is stopped by the vertical abutment surface, which returns the pad to the other two abutment surfaces.

Le tampon est auto-verrouillé lorsque, suivant une autre caractéristique de l'invention, les surfaces de contre-appui descendantes sont en surplomb.The pad is self-locked when, according to another characteristic of the invention, the descending counter-bearing surfaces are overhanging.

L'invention est exposée ci-après plus en détail à l'aide des dessins annexés, qui en représentent seulement un mode d'exécution. Sur ces dessins:

  • la Fig. l est une vue de dessus du cadre d'un regard conforme à l'invention;
  • la Fig. 2 en est une vue en coupe diamétrale prise suivant la ligne 2-2 de la Fig. l;
  • la Fig. 3 est une vue en élévation du tampon du même regard;
  • la Fig. 4 est une vue de dessous de ce tampon;
  • les Fig. 5 et 6 sont des schémas développés illustrant la mise en place du tampon;
  • la Fig. 7 illustre en coupe un détail du regard après cette mise en place; et
  • la Fig. 8 illustre schématiquement la stabilité du tampon.
The invention is set out below in more detail with the aid of the appended drawings, which show only one embodiment. In these drawings:
  • Fig. l is a top view of the frame of a manhole according to the invention;
  • Fig. 2 is a diametral section view taken along line 2-2 of FIG. l;
  • Fig. 3 is an elevational view of the stamp of the same gaze;
  • Fig. 4 is a bottom view of this stamp;
  • Figs. 5 and 6 are developed diagrams illustrating the placement of the tampon;
  • Fig. 7 illustrates in section a detail of the look after this installation; and
  • Fig. 8 schematically illustrates the stability of the buffer.

Le regard circulaire représenté aux Fig. l à 4 est constitué de deux pièces en fonte ductile brutes de fonderie, à savoir un cadre l destiné à'être scellé dans un revêtement de chaussée ou de trottoir et un tampon amovible lA.The circular gaze shown in Figs. l to 4 consists of two pieces of rough ductile iron foundry, namely a frame l intended to be sealed in a pavement or sidewalk covering and a removable buffer lA.

Le cadre 1 (Fig. 1 et 2), qui est moulable sans noyau, comprend une semelle inférieure annulaire 2 sur la périphérie intérieure de laquelle fait saillie vers le haut une jupe 3 à peu près cylindrique. Des nervures verticales 4 de rigidification s'étendent entre la semelle 2 et la jupe 3. A l'intérieur de cette jupe font saillie six surfaces régulièrement réparties angulairement: un appui plan 5, une butée verticale 6 de contre-appui diamétralement opposée à ce dernier, deux rampes d'appui hélicoïdales 7 encadrant la butée 6 et deux contre-appuis 8. De plus, une collerette intérieure de retenue 9 s'étend sur l'essentiel de la périphérie de la jupe 3, un peu au-dessous du niveau des reliefs 5 à 8.The frame 1 (Fig. 1 and 2), which is moldable without a core, comprises an annular lower sole 2 on the inner periphery of which protrudes upwards an approximately cylindrical skirt 3. Vertical stiffening ribs 4 extend between the sole 2 and the skirt 3. Inside this skirt protrude six surfaces regularly distributed angularly: a planar support 5, a vertical abutment 6 against diametrically opposed to this support last, two helical support ramps 7 framing the stop 6 and two counter-supports 8. In addition, an internal retaining collar 9 extends over most of the periphery of the skirt 3, a little below the level of the reliefs 5 to 8.

L'appui plan 5 et les deux rampes 7 ont à peu près la même étendue circonférentielle;les deux rampes sont inclinées d'un même angle dans le même sens circonférentiel, qui est dans cet exemple le sens horaire, et passent d'un niveau situé au-dessus de l'appui 5 à un niveau situé au-dessous de cet appui. La normale N à la butée 6 est inclinée d'un angle aigu α par rapport au rayon correspondant du cadre , dans le sens horaire.The plane support 5 and the two ramps 7 have approximately the same circumferential extent; the two ramps are inclined by the same angle in the same circumferential direction, which is in this example clockwise, and pass from one level located above support 5 at a level located below this support. The normal N to the stop 6 is inclined at an acute angle α relative to the corresponding radius of the frame, clockwise.

Chaque contre-appui 8 comporte une surface active 10 en surplomb qui a une forme tronconique de même axe que le cadre et qui descend dans le sens horaire suivant une pente à peu près égale à la moitié de la pente des rampes 7.Each counter-support 8 has an overhanging active surface 10 which has a frustoconical shape with the same axis as the frame and which descends clockwise along a slope roughly equal to half the slope of the ramps 7.

Le tampon 1A comprend un voile plan supérieur 11 pourvu près de sa périphérie d'une jupe inférieure 12 et, à l'intérieur de celle-ci, d'un nervurage 13 de rigidification. Le diamètre du voile 11 est un peu inférieur au diamètre intérieur de la jupe 3 du cadre.The pad 1A comprises an upper planar web 11 provided near its periphery with a lower skirt 12 and, inside the latter, of a stiffening rib 13. The diameter of the web 11 is a little less than the inside diameter of the skirt 3 of the frame.

Sur la périphérie de la jupe 12 font saillie vers l'extérieur six reliefs 5A à 8A respectivement conjugués, ou quasi-conjugués, des six reliefs 5 à 8 du cadre et répartis angulairement de la même façon. On retrouve ainsi un appui plan 5A, une butée verticale et oblique 6A diamétralement opposée à cet appui, deux rampes 7A encadrant la butée 6A et deux contre-appuis8A dont la face active 10A est tournée obliquement vers le haut. suivant un profil tronconique.On the periphery of the skirt 12 protrude outwards six reliefs 5A to 8A respectively conjugated, or almost conjugate, of the six reliefs 5 to 8 of the frame and angularly distributed in the same way. There is thus a flat support 5A, a vertical and oblique stop 6A diametrically opposite to this support, two ramps 7A framing the stop 6A and two counter-supports 8A whose active face 10A is turned obliquely upwards. following a frustoconical profile.

Les rampes 7A et 7 sont exactement conjuguées, mais l'inclinaison β vers le haut desfaces 10A des contre-appuis 8A est supérieure de quelques degrés à l'inclinai- scn γ vers le bas des faces 10 des contre-appuis 8(Fig.7). Le voile 11 est échancré au droit des contre-appuis 8A pour permettre un moulage sans noyau du tampon.The ramps 7A and 7 are exactly conjugate, but the inclination β upwards of the faces 10A of the counter-supports 8A is a few degrees greater than the inclination γ down of the faces 10 of the counter-supports 8 (Fig. 7). The veil 11 is notched at the right of the counter-supports 8A to allow a coreless molding of the pad.

La mise en place du tampon dans le cadre va maintenant être expliquée en regard des Fig. 5 et 6, qui constituent des schémas développés de la région comprise entre l'appui plan 5 et la rampe 7 qui le précède (Fig. 5) et de celle comprise entre les deux rampes 7 (Fig. 6)..The placement of the buffer in the frame will now be explained with reference to FIGS. 5 and 6, which constitute developed diagrams of the region between the plane support 5 and the ramp 7 which precedes it (Fig. 5) and that between the two ramps 7 (Fig. 6).

On pose le tampon de biais de façon que sa surface plane 5A s'appuie sur l'appui plan 5 du cadre., au point Al de la Fig. 5. Les rampes 7A s'appuient alors sur la partie supérieure des rampes 7, en B1, et les surfaces 10A se trouvent près des contre-appuis 10 (points Cl et Dl), mais sans contact avec eux.The buffer is placed at an angle so that its flat surface 5A rests on the plane support 5 of the frame., At point Al in FIG. 5. The ramps 7A are then supported on the upper part of the ramps 7, at B1, and the surfaces 10A are located near the counter-supports 10 (points Cl and Dl), but without contact with them.

La pente des rampes 7 et 7A est choisie suffisamment forte pour que, sous l'effet de son propre poids et compte tenu de la présence de diverses particules sur les surfaces 5 et 7, le tampon amorce de lui-même un mouvement de type hélicoïdal descendant, éventuellement initié par un coup de pioche. Au cours de ce mouvement, les rampes 7A glissent sur les rampes 7, suivant le trajet Bl-B2-B3,et l'appui 5A glisse simultanément sur l'appui 5 suivant A1-A2-A3. Ceci est permis par la pente précitée des contre-appuis 10, grâce à laquelle les surfaces 10A du tampon longent sans les toucher ces contre-appuis,comme représenté par les couples de points C2-D2 et C3-D3:The slope of the ramps 7 and 7A is chosen to be strong enough so that, under the effect of its own weight and taking into account the presence of various particles on the surfaces 5 and 7, the buffer itself initiates a helical type movement descending, possibly initiated by a pickaxe. During this movement, the ramps 7A slide on the ramps 7, following the path Bl-B2-B3, and the support 5A slides simultaneously on the support 5 along A1-A2-A3. This is permitted by the aforementioned slope of the counter-supports 10, thanks to which the surfaces 10A of the buffer run along these counter-supports without touching them, as represented by the pairs of points C2-D2 and C3-D3:

Bien entendu, le même mouvement se produit de l'autre côté du regard: l'autre rampe 7A glisse sur l'autre rampe 7, et l'autre surface 10A longe sans la toucher l'autre contre-appui 10.Of course, the same movement occurs on the other side of the gaze: the other ramp 7A slides on the other ramp 7, and the other surface 10A runs along without touching the other counter-support 10.

Ce mouvement pseudo-hélicoidal se poursuit jusqu'à venue de la butée 6A du tampon contre celle 6 du cadre (trajet E1-E2-E3 de la Fig. 6). La butée 6 développe alors une réaction horizontale et oblique, à peu près suivant la normale N à sa surface; la composante tangentielle de cette réaction arrête la rotation du tampon, tandis que sa composante radiale, dirigée vers l'appui plan 5, provoque une translation horizontale du tampon vers cet appui, jusqu'à contact des deux surfaces 10A contre les surfaces 10 respectives, lesquelles développent chacune une réaction radiale dirigée vers le bas.This pseudo-helical movement continues until the stop 6A of the buffer comes against that 6 of the frame (path E1-E2-E3 in FIG. 6). The stop 6 then develops a horizontal and oblique reaction, roughly along the normal N at its surface; the tangential component of this reaction stops the rotation of the buffer, while its radial component, directed towards the plane support 5, causes a horizontal translation of the buffer towards this support, until contact of the two surfaces 10A against the respective surfaces 10, which each develop a downward radial reaction.

On remarque sur la Fig. 7 que grâce à la relation β>γ précitée, avec en pratique une différence de quelques degrés et une valeur de l'ordre de 45° pour ces angles, on obtient après matage du métal une surface inférieure de.contact 10B. Ces angles, qui sont Mesurés dans des plans de coupe radiaux, sont constants sur toute la longueur des contre-appuis 10A.We notice in Fig. 7 that thanks to the above-mentioned relation β> γ, with in practice a difference of a few degrees and a value of the order of 45 ° for these angles, after matting the metal, a lower surface of de.contact 10B is obtained. These angles, which are measured in radial section planes, are constant over the entire length of the counter-supports 10A.

Une fois en place, le tampon possède ainsi six points de contact avec le cadre qui assurent sa stabilité (Fig. 8):

  • - si une force est exercée à l'intérieur du triangle 14 de stabilité défini par les trois appuis 5, 7, 7 du cadre., il n'y a aucune sollicitation du tampon au basculement;
  • - si une force est exercée dans le segment de cercle 15 défini par les deux rampes 7 et la butée 6, le tampon tend à basculer autour des deux rampes 7, et les contre-appuis 10 développent la réaction nécessaire pour s'y opposer;
  • si une force est exercée dans un des deux segments de cercle 16 restants, la tendance au basculement est contrée d'abord par la butée 6, dont la réaction renvoie le tampon vers les contre-appuis 10, et la stabilité est encore obtenue.
Once in place, the pad thus has six points of contact with the frame which ensure its stability (Fig. 8):
  • - If a force is exerted inside the triangle of stability 14 defined by the three supports 5, 7, 7 of the frame., there is no stress on the buffer during tilting;
  • - If a force is exerted in the circle segment 15 defined by the two ramps 7 and the stop 6, the pad tends to tilt around the two ramps 7, and the counter-supports 10 develop the reaction necessary to oppose it;
  • if a force is exerted in one of the two remaining circle segments 16, the tendency to tilt is first countered by the stop 6, the reaction of which returns the buffer to the counter-supports 10, and stability is still obtained.

De plus, du fait du surplomb des contre-appuis 10, le tampon est verrouillé:; c'est-à-dire qu'il ne peut être retiré par simple soulèvement mais nécessite pour cela un mouvement hélicoïdal inverse, que l'on obtient en faisant agir un outil dans une encoche 17 du voile 11 (Fig. 4).In addition, due to the overhang of the counter-supports 10, the buffer is locked :; that is to say that it cannot be removed by simple lifting but requires for this a reverse helical movement, which is obtained by acting a tool in a notch 17 of the web 11 (Fig. 4).

Le tampon 1A est ainsi auto-fermeur, auto- centreur, auto-verrouillé et stable. De plus, sa première mise en place en biais peut s'effectuer très facilement, sans qu'une grande précision soit nécessaire, par déplacement latéral du tampon sur le bord du cadre.The buffer 1A is thus self-closing, self-centering, self-locking and stable. In addition, its first bias setting can be done very easily, without great precision being necessary, by lateral displacement of the pad on the edge of the frame.

Claims (7)

1.- Regard de chaussée circulaire, du type comprenant un cadre (1) et un tampon (lA) pourvus sur leur périphérie d'une série de surfaces associées deux à deux, dont trois surfaces d'appui (5-5A, 7-7A) et trois surfaces de contre-appui (10-10A) intercalées entre les surfaces d'appui, caractérisé en ce que les surfaces d'appui de chaque pièce (l,lA) du regard comprennent deux rampes (7-7A) inclinées circonférentiellement dans le même sens et un appui plan (5-5A), et en ce que les surfaces de contre-appui (10) du cadre (1) comprennent une première surface verticale (6) située entre les deux rampes (7), et deux surfaces descendantes (10) qui encadrent l'appui plan (5) et qui suivent avec un diamètre légèrement supérieur la trajectoire suivie par les surfaces associées (10A) du tampon (lA) lors de la mise en place de ce dernier.1.- Circular manhole cover, of the type comprising a frame (1) and a buffer (lA) provided on their periphery with a series of surfaces associated in pairs, including three bearing surfaces (5-5A, 7- 7A) and three counter-bearing surfaces (10-10A) interposed between the bearing surfaces, characterized in that the bearing surfaces of each part (l, lA) of the manhole comprise two inclined ramps (7-7A) circumferentially in the same direction and with a flat support (5-5A), and in that the counter-support surfaces (10) of the frame (1) comprise a first vertical surface (6) located between the two ramps (7), and two descending surfaces (10) which surround the plane support (5) and which follow with a slightly greater diameter the trajectory followed by the associated surfaces (10A) of the pad (lA) during the positioning of the latter. 2.- Regard de chaussée suivant la revendication 1, caractérisé en ce que la surface verticale (6) est inclinée par rapport à la direction radiale correspondante du cadre (1).2.- manhole cover according to claim 1, characterized in that the vertical surface (6) is inclined relative to the corresponding radial direction of the frame (1). 3.- Regard de chaussée suivant l'une des revendications 1 et 2, caractérisé en ce que la normale à chacune des deux surfaces de contre-appui descendantes (10) est dirigée radialement.3.- manhole cover according to one of claims 1 and 2, characterized in that the normal to each of the two descending abutment surfaces (10) is directed radially. 4.- Regard de chaussée suivant l'une quelconque des revendications 1 à 3, caractérisé en ce que les surfaces de contre-appui descendantes (10) sont en surplomb.4.- manhole cover according to any one of claims 1 to 3, characterized in that the descending downforce surfaces (10) are overhanging. 5.- Regard de chaussée suivant l'une quelconque des revendications 1 à 4, caractérisé en ce que chaque rampe (7-7A) passe d'un niveau situé au-dessus de l'appui plan (5-5A) à un niveau situé au-dessous de cet appui plan.5.- manhole cover according to any one of claims 1 to 4, characterized in that each ramp (7-7A) passes from a level located above the plane support (5-5A) to a level located below this flat support. 6.- Regard de chaussée suivant l'une quelconque des revendications 1 à 5, caractérisé en ce que les six surfaces (5-5A, 6-6A, 7-7A) sont régulièrement réparties sur la périphérie du regard.6.- manhole cover according to any one of claims 1 to 5, characterized in that the six surfaces (5-5A, 6-6A, 7-7A) are regularly distributed over the periphery of the manhole. 7.- Regard de chaussée suivant l'une quelconque des revendications 1 à 6, caractérisé en ce que le cadre (1) comporte une collerette intérieure (9) entre lesdites surfaces d'appui et de contre-appui (5, 6, 7, 8).7.- manhole cover according to any one of claims 1 to 6, characterized in that the frame (1) has an inner flange (9) between said bearing and abutment surfaces (5, 6, 7 , 8).
EP82111515A 1981-12-29 1982-12-11 Manhole cover Withdrawn EP0083007A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8124375A FR2519046A1 (en) 1981-12-29 1981-12-29 FLOOR LOOK
FR8124375 1981-12-29

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EP0083007A1 true EP0083007A1 (en) 1983-07-06

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EP82111515A Withdrawn EP0083007A1 (en) 1981-12-29 1982-12-11 Manhole cover

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EP (1) EP0083007A1 (en)
FR (1) FR2519046A1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991001412A1 (en) * 1989-07-22 1991-02-07 Duct & Access Covers Ltd. Duct cover
EP0481938A2 (en) * 1990-10-18 1992-04-22 EDIL PLAST S.r.l. A modular frame for defining and profiling the edges of wells, canalizations for openings in general
GB2250307A (en) * 1989-07-22 1992-06-03 Duct & Access Covers Ltd Duct cover
WO1997022760A1 (en) * 1995-12-16 1997-06-26 Envirolite Holdings Limited Manhole cover
US20180291609A1 (en) * 2015-10-07 2018-10-11 Wavin B.V. Inspection chamber for a pipe structure for drainage or sewerage
US11401681B2 (en) * 2018-04-27 2022-08-02 Bingham & Taylor Corp. Snap on meter pit extension

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB482517A (en) * 1936-09-30 1938-03-30 Frederick Turnbull Improvements in and relating to manhole and like covers
DE1107158B (en) * 1958-06-14 1961-05-18 Passavant Werke Rectangular manhole cover
FR2082237A5 (en) * 1970-02-26 1971-12-10 Pont A Mousson
DE2049923A1 (en) * 1970-10-10 1972-04-13 Rheinstahl Ag, 4300 Essen Manhole cover in the shape of a hexagon
FR2192580A7 (en) * 1972-07-10 1974-02-08 Pont A Mousson

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB482517A (en) * 1936-09-30 1938-03-30 Frederick Turnbull Improvements in and relating to manhole and like covers
DE1107158B (en) * 1958-06-14 1961-05-18 Passavant Werke Rectangular manhole cover
FR2082237A5 (en) * 1970-02-26 1971-12-10 Pont A Mousson
DE2049923A1 (en) * 1970-10-10 1972-04-13 Rheinstahl Ag, 4300 Essen Manhole cover in the shape of a hexagon
FR2192580A7 (en) * 1972-07-10 1974-02-08 Pont A Mousson

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991001412A1 (en) * 1989-07-22 1991-02-07 Duct & Access Covers Ltd. Duct cover
GB2250307A (en) * 1989-07-22 1992-06-03 Duct & Access Covers Ltd Duct cover
EP0481938A2 (en) * 1990-10-18 1992-04-22 EDIL PLAST S.r.l. A modular frame for defining and profiling the edges of wells, canalizations for openings in general
EP0481938A3 (en) * 1990-10-18 1993-01-27 Edil Plast Di Savorani Sandra E C. - S.A.S. A modular frame for defining and profiling the edges of wells, canalizations for openings in general
US5279083A (en) * 1990-10-18 1994-01-18 Edil Plast S.R.L. Modular frame for defining and profiling the edges of wells, canalizations for openings in general
WO1997022760A1 (en) * 1995-12-16 1997-06-26 Envirolite Holdings Limited Manhole cover
US20180291609A1 (en) * 2015-10-07 2018-10-11 Wavin B.V. Inspection chamber for a pipe structure for drainage or sewerage
US10550562B2 (en) * 2015-10-07 2020-02-04 Wavin B.V. Inspection chamber for a pipe structure for drainage or sewerage
US11401681B2 (en) * 2018-04-27 2022-08-02 Bingham & Taylor Corp. Snap on meter pit extension

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