EP0580993A1 - Manhole cover for inspection shafts - Google Patents

Manhole cover for inspection shafts Download PDF

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Publication number
EP0580993A1
EP0580993A1 EP93109083A EP93109083A EP0580993A1 EP 0580993 A1 EP0580993 A1 EP 0580993A1 EP 93109083 A EP93109083 A EP 93109083A EP 93109083 A EP93109083 A EP 93109083A EP 0580993 A1 EP0580993 A1 EP 0580993A1
Authority
EP
European Patent Office
Prior art keywords
manhole
manhole cover
extension
shaft pipe
shaft
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.)
Ceased
Application number
EP93109083A
Other languages
German (de)
French (fr)
Inventor
Stephan Müller
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.)
Rehau Automotive SE and Co KG
Original Assignee
Rehau AG and Co
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 Rehau AG and Co filed Critical Rehau AG and Co
Publication of EP0580993A1 publication Critical patent/EP0580993A1/en
Ceased legal-status Critical Current

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Classifications

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

Definitions

  • the innovation relates to a manhole cover for inspection manholes in the ground drainage system with a manhole top and a manhole cover embedded therein, the manhole top at the free end facing away from the lid area having a tubular extension extension, in the lumen of which the free end of the manhole pipe is arranged.
  • Manhole covers known from the prior art are fitted directly to the end of the shaft pipe or bonded to the end of the shaft pipe with a close tolerance. Vertical forces from traffic loads and shock loads are thus transferred directly to the shaft pipe. Because of the tight tolerances or the firm connection between the manhole cover and the manhole end, tilting of the manhole cover cannot be accommodated without leading to overloading of the manhole pipe. The shaft pipe is thus exposed to the risk of damage up to pipe breakage, for example in the case of traffic loads, which can jeopardize the effectiveness of the entire shaft system.
  • the innovation comes in, which has set itself the task of specifying a manhole cover for inspection manholes in the ground drainage system, in which damage to the manhole end due to external loads is excluded.
  • the shaft pipe end is inserted with a defined setting dimension into the extension of the shaft attachment, and that a circumferential gap of a defined width is arranged between the inner circumference of the extension socket and the outer circumference of the inserted shaft pipe end, which is of a flexible, in a groove of the extension approach arranged sealing element is bridged.
  • the innovative manhole cover prevents any entry of forces from traffic loads into the manhole pipe itself. Rather, these forces are introduced into the ground or into the base layer of the traffic area around the manhole cover.
  • the slump of the shaft pipe end in the extension approach to its insertion depth is in a ratio of 1: 2.
  • the insertion depth of the shaft pipe end into the extension attachment is 40 mm, and the setting dimension is specified as 20 mm in this case. If these dimensions are not sufficient to absorb the forces from the expected traffic loads, you can easily use larger distances on the specified scale.
  • the gap between the inner circumference of the extension attachment and the outer circumference of the shaft pipe end in the plug-in area is a maximum of 6 mm.
  • canting of the manhole cover can be easily absorbed by an uneven load up to an inclination of approximately 10 °.
  • the manhole cover and manhole cover can be made of metallic material.
  • the manhole cover itself can be a closed or partially open cover.
  • the manhole cover can have at least one retaining web that protrudes above the groove for the sealing element into the lumen of the manhole top and is made in one piece with it and has a threaded passage for screwing the manhole cover.
  • the new shaft cover prevents damage to the end of the shaft pipe due to traffic loads introduced into the shaft pipe from the outside.
  • the manhole cover 1 shown in FIG. 1 consists of the manhole cover 2 and the manhole cover 3.
  • the manhole cover 2 has a flange-like shaft edge 21 which merges into an extension lug 22.
  • a lip sealing ring 4 is embedded in a circumferential groove 222.
  • the manhole cover 3 is embedded in a recess 23 provided.
  • the manhole cover 3 shown is a closed cover which is fixed by means of a screw 31 to the retaining web 24 molded onto the extension lug 22.
  • the shaft pipe 5 with its shaft pipe end 51 is inserted into the lumen of the extension lug 22.
  • the shaft pipe end 51 projects with the insertion depth E into the extension lug 22 of the shaft cover 1.
  • the insertion depth E is, for example, 40 mm.
  • the shaft pipe end 51 has a setting dimension S, which can be, for example, 20 mm as a range of motion.
  • a gap Sp is left between the outer circumference of the shaft pipe end 51 and the inner wall of the extension lug 22 and is bridged by the lip sealing ring 4.
  • the shaft pipe end 51 can thus move in the axial direction by the setting dimension S and, due to the gap dimension Sp, is mounted in the extension extension in such a way that it can move in an angular manner.
  • the manhole cover 1 shows the manhole cover 1 with the extension lug 22 and the manhole end 51 inserted into the lumen of the extension lug 22 in accordance with the statements relating to FIG. 1.
  • the manhole cover is designed as a regionally open cover 3 .
  • This manhole cover 3 which is open in some areas, forms a grating cover and is thus designed for the direct inflow of waste water into the manhole pipe 5.
  • the holding web 24 serves as a carrier for a sludge bucket 6, which projects into the lumen 52 of the shaft pipe 5.
  • the sludge bucket 6 is equipped with seepage openings 61, through which the waste water entering through the openings 32 of the manhole cover passes from the sludge bucket 6 into the lumen of the manhole pipe 5.

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

Abstract

The invention relates to a manhole cover for inspection shafts in foundation drainage. The manhole cover consists of a manhole top and a manhole lid let into the manhole top. At the free end remote from the lid area, the manhole top has a tubular extension neck for accommodating the free end of the manhole tube. The invention is seen in the fact that the manhole tube end (51) is inserted with a defined setting dimension (S) into the extension neck (22) of the manhole top (2). An encircling gap (Sp) of defined width is arranged between the inner periphery of the extension neck (22) and the outer periphery of the inserted manhole tube end (51). This encircling gap (Sp) is bridged by a flexible sealing element (4) arranged in a groove (222) of the extension neck (22). <IMAGE>

Description

Die Neuerung betrifft eine Schachtabdeckung für Kontrollschäche in der Baugrundentwässerung mit einem Schachtaufsatz und einem in diesen eingelassenen Schachtdeckel, wobei der Schachtaufsatz an dem vom Deckelbereich abgewandten freien Ende einen rohrförmigen Verlängerungsansatz aufweist, in dessen Lumen das freie Ende des Schachtrohres angeordnet ist. Nach dem Stand der Technik bekannte Schachtabdeckungen sind mit enger Toleranz direkt auf das Schachtrohrende aufgesteckt bzw. mit dem Schachtrohrende verklebt. Senkrechte Kräfte aus Verkehrsbelastungen und Stoßlasten werden damit direkt auf das Schachtrohr übertragen. Wegen der engen Toleranzen bzw. der festen Verbindung zwischen Schachtabdeckung und Schachtrohrende können auch Verkantungen der Schachtabdeckung nicht aufgenommen werden, ohne zu Überlastungen des Schachtrohres zu führen. Damit ist das Schachtrohr beispielsweise bei Verkehrsbelastungen der Gefahr von Beschädigungen bis zum Rohrbruch ausgesetzt, wodurch die Wirksamkeit des gesamten Schachtsystems in Frage gestellt werden kann.The innovation relates to a manhole cover for inspection manholes in the ground drainage system with a manhole top and a manhole cover embedded therein, the manhole top at the free end facing away from the lid area having a tubular extension extension, in the lumen of which the free end of the manhole pipe is arranged. Manhole covers known from the prior art are fitted directly to the end of the shaft pipe or bonded to the end of the shaft pipe with a close tolerance. Vertical forces from traffic loads and shock loads are thus transferred directly to the shaft pipe. Because of the tight tolerances or the firm connection between the manhole cover and the manhole end, tilting of the manhole cover cannot be accommodated without leading to overloading of the manhole pipe. The shaft pipe is thus exposed to the risk of damage up to pipe breakage, for example in the case of traffic loads, which can jeopardize the effectiveness of the entire shaft system.

Hier setzt die Neuerung ein, die es sich zur Aufgabe gestellt hat, eine Schachtabdeckung für Kontrollschächte in der Baugrundentwässerung anzugeben, bei der eine Beschädigung des Schachtrohrendes durch von außen kommende Belastungen ausgeschlossen ist. Neuerungsgemäß wird dazu vorgeschlagen, daß das Schachtrohrende mit einem definierten Setzmaß in den Verlängerungsansatz des Schachtaufsatzes eingesteckt ist, und daß zwischen dem inneren Umfang des Verlängerungsansatzes und dem Außenumfang des eingesteckten Schachtrohrendes ein umlaufender Spalt definierter Weite angeordnet ist, welcher von einem flexiblen, in einer Nut des Verlängerungsansatzes angeordneten Dichtelement überbrückt ist.This is where the innovation comes in, which has set itself the task of specifying a manhole cover for inspection manholes in the ground drainage system, in which damage to the manhole end due to external loads is excluded. According to the innovation, it is proposed that the shaft pipe end is inserted with a defined setting dimension into the extension of the shaft attachment, and that a circumferential gap of a defined width is arranged between the inner circumference of the extension socket and the outer circumference of the inserted shaft pipe end, which is of a flexible, in a groove of the extension approach arranged sealing element is bridged.

Die Neuerungsgemäße Schachtabdeckung verhindert jegliche Eintragung von Kräften aus Verkehrslasten in das Schachtrohr selbst. Diese Kräfte werden vielmehr in das Erdreich bzw. in die Tragschicht der Verkehrsfläche um die Schachtabdeckung herum eingetragen.The innovative manhole cover prevents any entry of forces from traffic loads into the manhole pipe itself. Rather, these forces are introduced into the ground or into the base layer of the traffic area around the manhole cover.

Es hat sich als vorteilhaft erwiesen, daß das Setzmaß des Schachtrohrendes im Verlängerungsansatz zu seiner Einstecktiefe im Verhältnis 1:2 steht. Bei einem Ausführungsbeispiel beträgt die Einstecktiefe des Schachtrohrendes in den Verlängerungsansatz 40 mm, das Setzmaß wird in diesem Fall mit 20 mm angegeben. Sollten diese Abmessungen für die Aufnahme der Kräfte aus den zu erwartenden Verkehrsbelastungen nicht ausreichen, können ohne weiteres vergrößerte Abstände im angegebenen Maßstab verwendet werden.It has proven to be advantageous that the slump of the shaft pipe end in the extension approach to its insertion depth is in a ratio of 1: 2. In one exemplary embodiment, the insertion depth of the shaft pipe end into the extension attachment is 40 mm, and the setting dimension is specified as 20 mm in this case. If these dimensions are not sufficient to absorb the forces from the expected traffic loads, you can easily use larger distances on the specified scale.

Ebenso vorteilhaft ist es, daß der Spalt zwischen dem inneren Umfang des Verlängerungsansatzes und dem Außenumfang des Schachtrohrendes im Steckbereich maximal 6 mm beträgt. Dadurch können Verkantungen der Schachtabdeckung durch ungleichmäßige Belastung bis zu einer Neigung von annähernd 10° ohne weiteres aufgenommen werden. Schachtaufsatz und Schachtdeckel können neuerungsgemäß aus metallischem Werkstoff hergestellt sein. Der Schachtdeckel selbst kann eine geschlossene oder bereichsweise geöffnete Abdeckung sein. Schließlich kann die Schachtabdeckung wenigstens einen oberhalb der Nut für das Dichtelement in das Lumen des Schachtaufsatzes ragenden, einstückig mit diesem hergestellten Haltesteg aufweisen, welcher einen Gewindedurchgang für die Verschraubung des Schachtdeckels besitzt.It is also advantageous that the gap between the inner circumference of the extension attachment and the outer circumference of the shaft pipe end in the plug-in area is a maximum of 6 mm. As a result, canting of the manhole cover can be easily absorbed by an uneven load up to an inclination of approximately 10 °. According to the innovation, the manhole cover and manhole cover can be made of metallic material. The manhole cover itself can be a closed or partially open cover. Finally, the manhole cover can have at least one retaining web that protrudes above the groove for the sealing element into the lumen of the manhole top and is made in one piece with it and has a threaded passage for screwing the manhole cover.

Die neuerungsgemäße Schachtabdeckung verhindert die Beschädigung des Schachtrohrendes durch von außen in das Schachtrohr eingeleitete Verkehrslasten.The new shaft cover prevents damage to the end of the shaft pipe due to traffic loads introduced into the shaft pipe from the outside.

In der Zeichnung sind Ausführungsbeispiele der neuerungsgemäßen Schachtabdeckung schematisch dargestellt; es zeigt:

  • Fig.1 die Schachtabdeckung mit geschlossenem Schachtdeckel
  • Fig.2 die Schachtabdeckung mit bereichsweise geöffnetem Schachtdeckel.
In the drawing, exemplary embodiments of the shaft cover according to the invention are shown schematically; it shows:
  • Fig.1 the manhole cover with the manhole cover closed
  • 2 shows the manhole cover with the manhole cover open in some areas.

Die in Fig.1 gezeigte Schachtabdeckung 1 besteht aus dem Schachtaufsatz 2 und dem Schachtdeckel 3. Der Schachtaufsatz 2 besitzt einen flanschartig umlaufenden Schachtrand 21, der in einen Verlängerungsansatz 22 übergeht. Am freien Ende 221 des Verlängerungsansatzes 22 ist in einer umlaufenden Nut 222 ein Lippendichtring 4 eingelassen.The manhole cover 1 shown in FIG. 1 consists of the manhole cover 2 and the manhole cover 3. The manhole cover 2 has a flange-like shaft edge 21 which merges into an extension lug 22. At the free end 221 of the extension lug 22, a lip sealing ring 4 is embedded in a circumferential groove 222.

Im Bereich des umlaufenden Flanschansatzes 21 ist in einer vorgesehenen Vertiefung 23 der Schachtdeckel 3 eingelassen. Der dargestellte Schachtdeckel 3 ist eine geschlossene Abdeckung, welche über eine Schraube 31 mit dem am Verlängerungsansatz 22 angeformtem Haltesteg 24 festgelegt ist.In the area of the circumferential flange shoulder 21, the manhole cover 3 is embedded in a recess 23 provided. The manhole cover 3 shown is a closed cover which is fixed by means of a screw 31 to the retaining web 24 molded onto the extension lug 22.

In das Lumen des Verlängerungsansatzes 22 ist das Schachtrohr 5 mit seinem Schachtrohrende 51 eingesetzt. Das Schachtrohrende 51 ragt mit der Einstecktiefe E in den Verlängerungsansatz 22 der Schachtabdeckung 1 hinein. Die Einstecktiefe E beträgt beispielsweise 40 mm.The shaft pipe 5 with its shaft pipe end 51 is inserted into the lumen of the extension lug 22. The shaft pipe end 51 projects with the insertion depth E into the extension lug 22 of the shaft cover 1. The insertion depth E is, for example, 40 mm.

Das Schachtrohrende 51 hat als Bewegungsspielraum ein Setzmaß S, das beispielsweise 20 mm betragen kann. Zwischen dem Außenumfang des Schachtrohrendes 51 und der Innenwand des Verlängerungsansatzes 22 ist ein Spalt Sp belassen, der durch den Lippendichtring 4 überbrückt wird.The shaft pipe end 51 has a setting dimension S, which can be, for example, 20 mm as a range of motion. A gap Sp is left between the outer circumference of the shaft pipe end 51 and the inner wall of the extension lug 22 and is bridged by the lip sealing ring 4.

Das Schachtrohrende 51 kann sich somit in axialer Richtung um das Setzmaß S bewegen und ist aufgrund des Spaltmaßes Sp entsprechend winkelbeweglich im Verlängerungsansatz gelagert.The shaft pipe end 51 can thus move in the axial direction by the setting dimension S and, due to the gap dimension Sp, is mounted in the extension extension in such a way that it can move in an angular manner.

Fig.2 zeigt die Schachtabdeckung 1 mit dem Verlängerungsansatz 22 und dem in das Lumen des Verlängerungsansatzes 22 eingesteckten Schachtrohrendes 51 entsprechend den Ausführungen zu Fig. 1. Im Unterschied zur Darstellung der Schachtabdeckung 1 in Fig.1 ist der Schachtdeckel als bereichsweise geöffnete Abdeckung 3 ausgebildet. Dieser bereichsweise geöffnete Schachtdeckel 3 bildet eine Gitterrost-Abdeckung und ist damit für den direkten Zufluß von Abwasser in das Schachtrohr 5 ausgebildet. Der Haltesteg 24 dient in dieser Ausführungsform als Träger für einen Schlammeimer 6, welcher in das Lumen 52 des Schachtrohres 5 hineinragt. Der Schlammeimer 6 ist mit Sickeröffnungen 61 ausgestattet, durch welche das durch die Öffnungen 32 des Schachtdeckels eintretende Abwasser aus dem Schlammeimer 6 in das Lumen des Schachtrohres 5 gelangt.2 shows the manhole cover 1 with the extension lug 22 and the manhole end 51 inserted into the lumen of the extension lug 22 in accordance with the statements relating to FIG. 1. In contrast to the representation of the manhole cover 1 in FIG. 1, the manhole cover is designed as a regionally open cover 3 . This manhole cover 3, which is open in some areas, forms a grating cover and is thus designed for the direct inflow of waste water into the manhole pipe 5. In this embodiment, the holding web 24 serves as a carrier for a sludge bucket 6, which projects into the lumen 52 of the shaft pipe 5. The sludge bucket 6 is equipped with seepage openings 61, through which the waste water entering through the openings 32 of the manhole cover passes from the sludge bucket 6 into the lumen of the manhole pipe 5.

Claims (6)

Schachtabdeckung für Kontrollschächte in der Baugrundentwässerung mit einem Schachtaufsatz und einem in diesen eingelassenen Schachtdeckel, wobei der Schachtaufsatz an dem vom Deckelbereich abgewandten freien Ende einen rohrförmigen Verlängerungsansatz aufweist, in dessen Lumen das freie Ende des Schachtrohres angeordnet ist, dadurch gekennzeichnet, daß das Schachtrohrende (51) mit einem definierten Setzmaß (S) in den Verlängerungsansatz (22) des Schachtaufsatzes (2) eingesteckt ist, und daß zwischen dem inneren Umfang des Verlängerungsansatzes 22 und dem Außenumfang des eingesteckten Schachtrohrendes (51) ein umlaufender Spalt (Sp) definierter Weite angeordnet ist, welcher von einem flexiblen, in einer Nut (222) des Verlängerungsansatzes (22) angeordneten Dichtelement (4) überbrückt ist.Manhole cover for inspection shafts in the ground drainage system with a manhole top and a manhole cover embedded therein, the manhole top at the free end facing away from the lid area having a tubular extension extension, in the lumen of which the free end of the manhole pipe is arranged, characterized in that the manhole end (51 ) with a defined slump (S) is inserted into the extension extension (22) of the shaft attachment (2), and that a circumferential gap (Sp) of a defined width is arranged between the inner circumference of the extension extension 22 and the outer circumference of the inserted shaft pipe end (51) which is bridged by a flexible sealing element (4) arranged in a groove (222) of the extension lug (22). Schachtabdeckung nach Anspruch 1, dadurch gekennzeichnet, daß das Setzmaß (S) des Schachtrohrendes (51) im Verlängerungsansatz (22) zu seiner Einstecktiefe (E) im Verhältnis 1:2 steht.Manhole cover according to claim 1, characterized in that the setting dimension (S) of the shaft pipe end (51) in the extension (22) is in a ratio of 1: 2 to its insertion depth (E). Schachtabdeckung nach Anspruch 1, dadurch gekennzeichnet, daß der Spalt (Sp) zwischen dem inneren Umfang des Verlängerungsansatzes (22) und dem Außenumfang des Schachtrohrendes (51) im Steckbereich maximal 6 mm beträgt.Manhole cover according to claim 1, characterized in that the gap (Sp) between the inner circumference of the extension extension (22) and the outer circumference of the shaft pipe end (51) in the plug-in area is a maximum of 6 mm. Schachtabdeckung nach Anspruch 1, dadurch gekennzeichnet, daß der Schachtaufsatz (2) und der Schachtdeckel (3) aus metallischem Werkstoff hergestellt sind.Manhole cover according to claim 1, characterized in that the manhole cover (2) and the manhole cover (3) are made of metallic material. Schachtabdeckung nach Ansprüchen 1 und 4, dadurch gekennzeichnet, daß der Schachtdeckel (3) eine geschlossene oder bereichsweise geöffnete Abdeckung ist.Manhole cover according to claims 1 and 4, characterized in that the manhole cover (3) is a closed or partially open cover. Schachtabdeckung nach Anspruch 1, gekennzeichnet durch wenigstens einen oberhalb der Nut (222) für das Dichtelement (4) in das Lumen des Schachtaufsatzes (22) ragenden, einstückig mit diesem hergestellten Haltesteg (24), welcher einen Gewindedurchgang für die Verschraubung des Schachtdeckels (3) besitzt.Manhole cover according to claim 1, characterized by at least one retaining web (24) protruding above the groove (222) for the sealing element (4) into the lumen of the manhole attachment (22) and having a threaded passage for screwing the manhole cover (3 ) has.
EP93109083A 1992-07-29 1993-06-05 Manhole cover for inspection shafts Ceased EP0580993A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9210163U DE9210163U1 (en) 1992-07-29 1992-07-29 Manhole cover for inspection shafts
DE9210163U 1992-07-29

Publications (1)

Publication Number Publication Date
EP0580993A1 true EP0580993A1 (en) 1994-02-02

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ID=6882128

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93109083A Ceased EP0580993A1 (en) 1992-07-29 1993-06-05 Manhole cover for inspection shafts

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EP (1) EP0580993A1 (en)
DE (1) DE9210163U1 (en)
FI (1) FI933372A (en)
NO (1) NO932141L (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19738218A1 (en) * 1997-09-02 1999-03-18 Uponor Anger Gmbh Support frame for duct covers
GB2449641A (en) * 2007-05-26 2008-12-03 Wrekin Welding Fabrication & E A seal arrangement for a surface access assembly

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19647397C2 (en) * 1996-11-15 1999-04-15 Siemens Ag Underfloor container

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL6502680A (en) * 1965-03-03 1966-09-05
US3970559A (en) * 1974-12-19 1976-07-20 Thomas Cannon Drain guard
GB2210392A (en) * 1987-09-30 1989-06-07 Gatic Australia Pty Limited Drainage grating assembly

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7305165U (en) * 1973-05-30 Feldmann W Prefabricated lining for inspection shafts and the like
AU421598B2 (en) * 1968-03-29 1972-02-21 Monzino Riotinto Of Australia Limited Separation of molten materials
DE3442178A1 (en) * 1984-11-17 1986-05-28 Bernhard 8071 Lenting Kessel Manhole cover

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL6502680A (en) * 1965-03-03 1966-09-05
US3970559A (en) * 1974-12-19 1976-07-20 Thomas Cannon Drain guard
GB2210392A (en) * 1987-09-30 1989-06-07 Gatic Australia Pty Limited Drainage grating assembly

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19738218A1 (en) * 1997-09-02 1999-03-18 Uponor Anger Gmbh Support frame for duct covers
DE19738218C2 (en) * 1997-09-02 2000-01-05 Uponor Anger Gmbh Support frame for duct covers, riser arrangement and manufacturing method
GB2449641A (en) * 2007-05-26 2008-12-03 Wrekin Welding Fabrication & E A seal arrangement for a surface access assembly
GB2449641B (en) * 2007-05-26 2012-02-08 Wrekin Holdings Ltd Sealing members

Also Published As

Publication number Publication date
DE9210163U1 (en) 1992-09-24
FI933372A (en) 1994-01-30
FI933372A0 (en) 1993-07-28
NO932141D0 (en) 1993-06-11
NO932141L (en) 1994-01-31

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