EP1932971A1 - Manhole cover - Google Patents

Manhole cover Download PDF

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Publication number
EP1932971A1
EP1932971A1 EP07291485A EP07291485A EP1932971A1 EP 1932971 A1 EP1932971 A1 EP 1932971A1 EP 07291485 A EP07291485 A EP 07291485A EP 07291485 A EP07291485 A EP 07291485A EP 1932971 A1 EP1932971 A1 EP 1932971A1
Authority
EP
European Patent Office
Prior art keywords
auxiliary seal
skirt
seal
frame
buffer
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
EP07291485A
Other languages
German (de)
French (fr)
Other versions
EP1932971B1 (en
Inventor
Arnaud Cuny
Jacky Boca
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.)
Saint Gobain PAM SA
Original Assignee
Saint Gobain PAM SA
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 Saint Gobain PAM SA filed Critical Saint Gobain PAM SA
Publication of EP1932971A1 publication Critical patent/EP1932971A1/en
Application granted granted Critical
Publication of EP1932971B1 publication Critical patent/EP1932971B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • E02D29/149—Annular gaskets

Definitions

  • the main seal is used to silence the look in the closed state, as well as to reduce the amount of water likely to enter the gap between the frame and the buffer, without guaranteeing a complete seal.
  • the invention aims to improve the waterproofness of this manhole, with simple and economical means.
  • the invention relates to a manhole of the type indicated, characterized in that the main seal and the auxiliary seal are formed by two separate parts.
  • the single figure shows in section a manhole according to the invention, designated by the general reference 2.
  • the manhole 2 comprises a frame 4 and a buffer 10 supported by the frame.
  • the frame 4 and the pad 10 define a central axis X-X and are preferably made of ductile iron.
  • the frame 4 delimits an opening 6 and has an internal collar 8 serving to support the pad 10.
  • the buffer 10 has a substantially planar sealing web 12, perpendicular to the central axis XX and which closes the opening 6 when the buffer 10 is in the closed position on the frame, and a cylindrical skirt 14 located under the sealing veil 12 and which extends inward parallel to the central axis XX.
  • the cylindrical skirt 14 is centered on the central axis XX and extends into the opening delimited by the internal collar 8.
  • the skirt 14 is located at a distance from the periphery of the sealing veil 12, the latter thus delimiting a flange device 13 having an inner surface 15 which is perpendicular to the central axis XX and which connects to the skirt 14.
  • the inner surface 15 and the skirt 14 thus define a concave corner 16 which is directed radially outwards relative to the central axis XX.
  • the manhole 2 is further provided with a main seal 18, made of an elastic material, such as elastomer for example.
  • the main seal 18 is disposed on the inner collar 8 and located between the buffer 10 and the frame 4 in the closed state of the eye 2. More specifically, the main seal 18 has a C-shaped radial section, surrounding the inner flange 8. In the closed position, the lower surface 15 of the rim 13 of the buffer rests on the main seal 18, thus preventing the sound of slamming of the buffer on the frame during the passage of vehicles .
  • the main seal 18 also provides a primary seal against runoff water likely to enter the gap between the buffer and the frame.
  • the manhole 2 also includes an auxiliary seal 20 for sealing the runoff water.
  • This auxiliary seal 20 is disposed on the skirt 14 and is in contact with the concave corner 16.
  • the auxiliary seal 20 is made in one piece and an elastic material, for example elastomeric material.
  • the two seals 18 and 20 are made of the same material.
  • the auxiliary seal 20 comprises a first sealing lip portion 22 and a second portion 24 integral with the first portion 22.
  • the first portion 22 is generally torus shaped and has a hollow ring-shaped radial cross-section which facilitates deformation thereof.
  • the second portion 24 extends the first portion 22 axially inward and has a non-circular radial cross section, in this case a substantially rectangular cross section.
  • the radial cross section of the auxiliary seal 20 is substantially P-shaped.
  • the second portion 24 applies over its entire axial length to the skirt 14 and serves essentially to prevent the sliding and twisting of the auxiliary seal 20 on the skirt 14.
  • the axial length of the second portion 24 is greater than the axial length of the first portion 22.
  • the auxiliary seal 20 When closing the buffer 10 on the frame 4, the auxiliary seal 20 is placed against the main seal 18 and at least the sealing lip 22 is elastically compressed. Thus this auxiliary seal 20 substantially increases the tightness of the manhole 2.
  • the auxiliary seal 20 according to the invention can easily be installed on existing manholes.

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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)
  • Sewage (AREA)

Abstract

The manhole (2) has a cover (10) with a closure shell (12) to close an opening (6) defined by a frame (4), and a cylindrical skirt (14) centered on a central axis (X-X). A main seal (18) is arranged on an inner flange (8) of the frame, and interposed between the cover and the frame when the cover is in closed position. The skirt defines a concave corner (16) radially directed outwards relative to the axis. An auxiliary seal (20) is arranged on the skirt, and contacts the corner when the manhole is at closed state. The seals are made of elastic material.

Description

La présente invention concerne un regard de chaussée, du type définissant un axe central et comprenant

  • un cadre délimitant une ouverture et muni d'une collerette interne s'étendant radialement vers l'intérieur,
  • un tampon comprenant un voile d'obturation destiné à obturer l'ouverture ainsi qu'une jupe cylindrique centrée sur l'axe central et sensiblement complémentaire de la collerette interne, le voile d'obturation et la jupe définissant un coin concave dirigé radialement vers l'extérieur par rapport à l'axe central, et
  • un joint principal disposé sur la collerette interne et interposé entre le tampon et le cadre lorsque le tampon est en position de fermeture, le regard de chaussée comprenant un joint auxiliaire qui est, au moins à l'état fermé du regard, disposé sur la jupe et est en contact avec le coin concave.
The present invention relates to a manhole, of the type defining a central axis and comprising
  • a frame defining an opening and provided with an inner flange extending radially inwards,
  • a buffer comprising a sealing veil intended to close the opening and a cylindrical skirt centered on the central axis and substantially complementary to the inner collar, the sealing veil and the skirt defining a concave wedge directed radially towards the outside the central axis, and
  • a main seal disposed on the inner collar and interposed between the buffer and the frame when the buffer is in the closed position, the manhole comprising an auxiliary seal which is, at least in the closed state of view, arranged on the skirt and is in contact with the concave corner.

On connaît dans l'état de la technique des regards de chaussée de ce type. Le joint principal est utilisé afin d'insonoriser le regard à l'état fermé, ainsi que pour réduire la quantité d'eau susceptible d'entrer dans l'interstice entre le cadre et le tampon, sans toutefois garantir une étanchéité complète.In the state of the art, there are known manholes of this type. The main seal is used to silence the look in the closed state, as well as to reduce the amount of water likely to enter the gap between the frame and the buffer, without guaranteeing a complete seal.

L'invention a pour but d'améliorer l'étanchéité de ce regard de chaussée, et ce avec des moyens simples et économiques.The invention aims to improve the waterproofness of this manhole, with simple and economical means.

A cet effet, l'invention a pour objet un regard de chaussée du type indiqué, caractérisé en ce que le joint principal et le joint auxiliaire sont formés par deux pièces distinctes.For this purpose, the invention relates to a manhole of the type indicated, characterized in that the main seal and the auxiliary seal are formed by two separate parts.

Selon des modes particuliers de réalisation, le regard de chaussée selon l'invention comporte l'une ou plusieurs des caractéristiques suivantes :

  • le joint auxiliaire comprend une première partie formant lèvre d'étanchéité ;
  • la première partie a une forme de tore ;
  • la première partie a une section transversale creuse, notamment en forme d'anneau ;
  • le joint auxiliaire comprend une seconde partie solidaire de la première partie et ayant une section transversale non circulaire ;
  • la seconde partie prolonge la première partie axialement vers l'intérieur et s'applique sur toute sa longueur axiale sur la jupe ;
  • la seconde partie du joint auxiliaire est adaptée pour empêcher le glissement et la torsion du joint auxiliaire sur la jupe ;
  • le joint principal et le joint auxiliaire sont fabriqués en matière élastique, de préférence en la même matière élastique ; et
  • le joint auxiliaire est adapté pour venir se poser contre le joint principal et la lèvre d'étanchéité lors de la fermeture du tampon sur le cadre.
According to particular embodiments, the manhole according to the invention comprises one or more of the following characteristics:
  • the auxiliary seal comprises a first sealing lip portion;
  • the first part has a torus shape;
  • the first part has a hollow cross section, in particular ring-shaped;
  • the auxiliary seal comprises a second portion secured to the first portion and having a non-circular cross section;
  • the second portion extends the first portion axially inwardly and applies over its entire axial length to the skirt;
  • the second portion of the auxiliary seal is adapted to prevent sliding and twisting of the auxiliary seal on the skirt;
  • the main seal and the auxiliary seal are made of elastic material, preferably of the same elastic material; and
  • the auxiliary seal is adapted to come to rest against the main seal and the sealing lip when closing the buffer on the frame.

L'invention sera mieux comprise à la lecture de la description qui va suivre, donnée uniquement à titre d'exemple et faite en se référant au dessin unique, sur lequel est représentée une partie d'un regard de chaussée selon l'invention.The invention will be better understood on reading the description which follows, given solely by way of example and with reference to the single drawing, on which is represented a part of a manhole according to the invention.

La Figure unique montre en coupe un regard de chaussée selon l'invention, désigné par la référence générale 2.The single figure shows in section a manhole according to the invention, designated by the general reference 2.

Le regard de chaussée 2 comprend un cadre 4 et un tampon 10 supporté par le cadre. Le cadre 4 et le tampon 10 définissent un axe central X-X et sont de préférence réalisés en fonte ductile.The manhole 2 comprises a frame 4 and a buffer 10 supported by the frame. The frame 4 and the pad 10 define a central axis X-X and are preferably made of ductile iron.

Le cadre 4 délimite une ouverture 6 et comporte une collerette interne 8 servant d'appui au tampon 10.The frame 4 delimits an opening 6 and has an internal collar 8 serving to support the pad 10.

Le tampon 10 présente un voile d'obturation 12 sensiblement plan, perpendiculaire à l'axe central X-X et qui obture l'ouverture 6 lorsque le tampon 10 est en position de fermeture sur le cadre, ainsi qu'une jupe cylindrique 14 située sous le voile d'obturation 12 et qui s'étend vers l'intérieur parallèlement à l'axe central X-X.The buffer 10 has a substantially planar sealing web 12, perpendicular to the central axis XX and which closes the opening 6 when the buffer 10 is in the closed position on the frame, and a cylindrical skirt 14 located under the sealing veil 12 and which extends inward parallel to the central axis XX.

La jupe cylindrique 14 est centrée sur l'axe central X-X et s'étend dans l'ouverture délimitée par la collerette interne 8. La jupe 14 est située à distance de la périphérie du voile d'obturation 12, ce dernier délimitant ainsi un rebord périphérique 13 ayant une surface intérieure 15 qui est perpendiculaire à l'axe central X-X et qui se raccorde à la jupe 14. La surface intérieure 15 et la jupe 14 définissent ainsi un coin concave 16 qui est dirigé radialement vers l'extérieur par rapport à l'axe central X-X.The cylindrical skirt 14 is centered on the central axis XX and extends into the opening delimited by the internal collar 8. The skirt 14 is located at a distance from the periphery of the sealing veil 12, the latter thus delimiting a flange device 13 having an inner surface 15 which is perpendicular to the central axis XX and which connects to the skirt 14. The inner surface 15 and the skirt 14 thus define a concave corner 16 which is directed radially outwards relative to the central axis XX.

Le regard de chaussée 2 est en outre muni d'un joint principal 18, fabriqué en une matière élastique, telle que de l'élastomère par exemple. Le joint principal 18 est disposé sur la collerette interne 8 et situé entre le tampon 10 et le cadre 4 à l'état fermé du regard 2. Plus précisément, le joint principal 18 a une section radiale en forme de C, entourant la collerette interne 8. En position de fermeture, la surface inférieure 15 du rebord 13 du tampon repose sur le joint principal 18, empêchant ainsi les bruits de claquement du tampon sur le cadre lors du passage de véhicules. En plus de cette fonction d'insonorisation, le joint principal 18 assure également une étanchéité primaire par rapport aux eaux de ruissellement susceptibles de s'introduire dans l'interstice entre le tampon et le cadre.The manhole 2 is further provided with a main seal 18, made of an elastic material, such as elastomer for example. The main seal 18 is disposed on the inner collar 8 and located between the buffer 10 and the frame 4 in the closed state of the eye 2. More specifically, the main seal 18 has a C-shaped radial section, surrounding the inner flange 8. In the closed position, the lower surface 15 of the rim 13 of the buffer rests on the main seal 18, thus preventing the sound of slamming of the buffer on the frame during the passage of vehicles . In addition to this soundproofing function, the main seal 18 also provides a primary seal against runoff water likely to enter the gap between the buffer and the frame.

Le regard de chaussée 2 comprend également un joint auxiliaire 20 destiné à parfaire l'étanchéité aux eaux de ruissellement. Ce joint auxiliaire 20 est disposé sur la jupe 14 et est en contact avec le coin concave 16. Le joint auxiliaire 20 est fabriqué d'un seul tenant et en une matière élastique, par exemple en matière élastomère. De préférence, les deux joints 18 et 20 sont fabriqués en la même matière. Le joint auxiliaire 20 comprend une première partie formant lèvre d'étanchéité 22, ainsi qu'une seconde partie 24 solidaire de la première partie 22.The manhole 2 also includes an auxiliary seal 20 for sealing the runoff water. This auxiliary seal 20 is disposed on the skirt 14 and is in contact with the concave corner 16. The auxiliary seal 20 is made in one piece and an elastic material, for example elastomeric material. Preferably, the two seals 18 and 20 are made of the same material. The auxiliary seal 20 comprises a first sealing lip portion 22 and a second portion 24 integral with the first portion 22.

La première partie 22 a une forme générale de tore et a une section transversale radiale creuse en forme d'anneau qui facilite sa déformation.The first portion 22 is generally torus shaped and has a hollow ring-shaped radial cross-section which facilitates deformation thereof.

La seconde partie 24 prolonge la première partie 22 axialement vers l'intérieur et a une section transversale radiale non circulaire, en l'occurrence une section transversale sensiblement rectangulaire. Ainsi, la section transversale radiale du joint auxiliaire 20 a sensiblement une forme de P.The second portion 24 extends the first portion 22 axially inward and has a non-circular radial cross section, in this case a substantially rectangular cross section. Thus, the radial cross section of the auxiliary seal 20 is substantially P-shaped.

Il est à noter que la seconde partie 24 s'applique sur toute sa longueur axiale sur la jupe 14 et sert essentiellement à empêcher le glissement et la torsion du joint auxiliaire 20 sur la jupe 14. De plus, la longueur axiale de la seconde partie 24 est supérieure à la longueur axiale de la première partie 22.It should be noted that the second portion 24 applies over its entire axial length to the skirt 14 and serves essentially to prevent the sliding and twisting of the auxiliary seal 20 on the skirt 14. In addition, the axial length of the second portion 24 is greater than the axial length of the first portion 22.

Lors de la fermeture du tampon 10 sur le cadre 4, le joint auxiliaire 20 vient se poser contre le joint principal 18 et au moins la lèvre d'étanchéité 22 est élastiquement comprimée. Ainsi ce joint auxiliaire 20 augmente d'une manière sensible l'étanchéité du regard de chaussée 2.When closing the buffer 10 on the frame 4, the auxiliary seal 20 is placed against the main seal 18 and at least the sealing lip 22 is elastically compressed. Thus this auxiliary seal 20 substantially increases the tightness of the manhole 2.

Le joint auxiliaire 20 selon l'invention peut facilement être installé sur des regards de chaussée existants.The auxiliary seal 20 according to the invention can easily be installed on existing manholes.

Claims (9)

Regard de chaussée, du type définissant un axe central (X-X) et comprenant - un cadre (4) délimitant une ouverture (6) et muni d'une collerette interne (8) s'étendant radialement vers l'intérieur, - un tampon (10) comprenant un voile d'obturation (12) destiné à obturer l'ouverture (6) ainsi qu'une jupe cylindrique (14) centrée sur l'axe central (X-X) et sensiblement complémentaire de la collerette interne (8), le voile d'obturation (12) et la jupe définissant un coin concave (16) dirigé radialement vers l'extérieur par rapport à l'axe central (X-X), et - un joint principal (18) disposé sur la collerette interne (8) et interposé entre le tampon (10) et le cadre (4) lorsque le tampon est en position de fermeture,
le regard de chaussée (2) comprenant un joint auxiliaire (20) qui est, au moins à l'état fermé du regard, disposé sur la jupe (14) et est en contact avec le coin concave (16), caractérisé en ce que le joint principal (18) et le joint auxiliaire (20) sont formés par deux pièces distinctes.Pavement look, of the type defining a central axis (XX) and comprising - a frame (4) defining an opening (6) and provided with an inner flange (8) extending radially inwards, - A buffer (10) comprising a sealing web (12) intended to close the opening (6) and a cylindrical skirt (14) centered on the central axis (XX) and substantially complementary to the internal collar ( 8), the sealing web (12) and the skirt defining a concave corner (16) directed radially outwardly with respect to the central axis (XX), and - a main seal (18) disposed on the inner collar (8) and interposed between the buffer (10) and the frame (4) when the buffer is in the closed position,
the manhole (2) comprising an auxiliary seal (20) which is, at least in the closed state of vision, arranged on the skirt (14) and is in contact with the concave corner (16), characterized in that the main seal (18) and the auxiliary seal (20) are formed by two separate pieces. Regard selon la revendication 1, caractérisé en ce que le joint auxiliaire (20) comprend une première partie (22) formant lèvre d'étanchéité.A liner according to claim 1, characterized in that the auxiliary seal (20) comprises a first sealing lip portion (22). Regard selon la revendication 2, caractérisé en ce que la première partie (22) a une forme de tore.A look according to claim 2, characterized in that the first portion (22) has a torus shape. Regard selon l'une quelconque des revendications 2 ou 3, caractérisé en ce que la première partie a une section transversale creuse, notamment en forme d'anneau.Eye according to any one of claims 2 or 3, characterized in that the first part has a hollow cross section, in particular in the form of a ring. Regard selon l'une quelconque des revendications 2 à 4, caractérisé en ce que le joint auxiliaire comprend une seconde partie (24) solidaire de la première partie (22) et ayant une section transversale non circulaire.An eye according to any one of claims 2 to 4, characterized in that the auxiliary seal comprises a second portion (24) integral with the first portion (22) and having a non-circular cross section. Regard selon la revendication 5, caractérisé en ce que la seconde partie (24) prolonge la première partie (22) axialement vers l'intérieur et s'applique sur toute sa longueur axiale sur la jupe (14).A look according to claim 5, characterized in that the second portion (24) extends the first portion (22) axially inwardly and applies over its entire axial length to the skirt (14). Regard selon la revendication 5 ou 6, caractérisé en ce que la seconde partie (24) du joint auxiliaire est adaptée pour empêcher le glissement et la torsion du joint auxiliaire sur la jupe.An eye according to claim 5 or 6, characterized in that the second portion (24) of the auxiliary seal is adapted to prevent sliding and twisting of the auxiliary seal on the skirt. Regard selon l'une quelconque des revendications 1 à 7, caractérisé en ce que le joint principal (18) et le joint auxiliaire (20) sont fabriqués en matière élastique, de préférence en la même matière élastique.An eye according to any one of claims 1 to 7, characterized in that the main seal (18) and the auxiliary seal (20) are made of elastic material, preferably of the same elastic material. Regard selon l'une quelconque des revendications 1 à 8, caractérisé en ce que le joint auxiliaire (20) est adapté pour venir se poser contre le joint principal (18) et la lèvre d'étanchéité (22) lors de la fermeture du tampon (10) sur le cadre.Eye according to any one of claims 1 to 8, characterized in that the auxiliary seal (20) is adapted to come to rest against the main seal (18) and the sealing lip (22) when closing the buffer (10) on the frame.
EP07291485.6A 2006-12-14 2007-12-11 Manhole cover Active EP1932971B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0610908A FR2910030B1 (en) 2006-12-14 2006-12-14 LOOK OF PUTTING

Publications (2)

Publication Number Publication Date
EP1932971A1 true EP1932971A1 (en) 2008-06-18
EP1932971B1 EP1932971B1 (en) 2016-06-08

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ID=38196558

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07291485.6A Active EP1932971B1 (en) 2006-12-14 2007-12-11 Manhole cover

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US (1) US7491010B2 (en)
EP (1) EP1932971B1 (en)
ES (1) ES2589590T3 (en)
FR (1) FR2910030B1 (en)
PL (1) PL1932971T3 (en)
PT (1) PT1932971T (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8640737B2 (en) * 2010-12-07 2014-02-04 Lmk Technologies, Llc Apparatus and method for sealing pipes and underground structures
US8360679B2 (en) 2011-03-29 2013-01-29 Strike Tool, Inc. Inflow and infiltration cap and seal barrier
RU190604U1 (en) * 2019-05-16 2019-07-04 Открытое Акционерное Общество "Тяжпрессмаш" SUPPORTING-HOOKING ELEMENT OF THE OWNER WELL

Citations (7)

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Publication number Priority date Publication date Assignee Title
US3308727A (en) 1964-04-08 1967-03-14 Central States Ind Supply Comp Support for manhole cover and the like
FR2153823A5 (en) * 1971-09-23 1973-05-04 Pont A Mousson Fond
US4440407A (en) * 1982-11-24 1984-04-03 Michael Gagas Manhole cover gasket seal
US4608787A (en) 1984-06-25 1986-09-02 Carlson Franklin J Manhole seal construction
US4834574A (en) 1987-07-23 1989-05-30 Bowman Harold M Utility cover extension
FR2780997A1 (en) 1998-07-13 2000-01-14 Manoir Ind Floating pad for use in water based environment
EP1452648A1 (en) * 2003-02-26 2004-09-01 F.M.C. Waterproof sealing device for covering an opening, such as a manhole cover

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US3920347A (en) * 1973-10-29 1975-11-18 Roby Ind Inc Manhole cover
US4101236A (en) * 1977-06-29 1978-07-18 Neenah Foundry Company Sealing manhole cover for use on existing unsealed sanitary sewer manhole cover frames
US4187647A (en) * 1977-10-25 1980-02-12 Margaret T. Hall Manhole extender elements
US4203190A (en) * 1978-06-15 1980-05-20 Temple Lowell D Method for connecting sewer pipes to manholes
US4706718A (en) * 1986-06-17 1987-11-17 Universal Valve Co., Inc. Containment manhole having spillage sealing means
US5021261A (en) * 1987-07-23 1991-06-04 Bowman Harold M Process for making a manhole cover support having enhanced grip
GB8804652D0 (en) * 1988-02-27 1988-03-30 Centa A R Access covers for manholes
US6435764B1 (en) * 1999-09-16 2002-08-20 Mcneely P. Dennis Nondestructive system for adjusting manhole and catch-basin elevations

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3308727A (en) 1964-04-08 1967-03-14 Central States Ind Supply Comp Support for manhole cover and the like
FR2153823A5 (en) * 1971-09-23 1973-05-04 Pont A Mousson Fond
US4440407A (en) * 1982-11-24 1984-04-03 Michael Gagas Manhole cover gasket seal
US4608787A (en) 1984-06-25 1986-09-02 Carlson Franklin J Manhole seal construction
US4834574A (en) 1987-07-23 1989-05-30 Bowman Harold M Utility cover extension
FR2780997A1 (en) 1998-07-13 2000-01-14 Manoir Ind Floating pad for use in water based environment
EP1452648A1 (en) * 2003-02-26 2004-09-01 F.M.C. Waterproof sealing device for covering an opening, such as a manhole cover

Also Published As

Publication number Publication date
US20080145147A1 (en) 2008-06-19
FR2910030A1 (en) 2008-06-20
US7491010B2 (en) 2009-02-17
PT1932971T (en) 2016-09-13
ES2589590T3 (en) 2016-11-15
PL1932971T3 (en) 2016-12-30
EP1932971B1 (en) 2016-06-08
FR2910030B1 (en) 2011-04-15

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