GB2381817A - Improvements in and relating to access covers - Google Patents

Improvements in and relating to access covers Download PDF

Info

Publication number
GB2381817A
GB2381817A GB0127086A GB0127086A GB2381817A GB 2381817 A GB2381817 A GB 2381817A GB 0127086 A GB0127086 A GB 0127086A GB 0127086 A GB0127086 A GB 0127086A GB 2381817 A GB2381817 A GB 2381817A
Authority
GB
United Kingdom
Prior art keywords
access cover
flanges
frame
frame portion
upstanding
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
GB0127086A
Other versions
GB2381817B (en
GB0127086D0 (en
Inventor
Ronald Francis Clark
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.)
CLARKSTEEL Ltd
Original Assignee
CLARKSTEEL Ltd
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 CLARKSTEEL Ltd filed Critical CLARKSTEEL Ltd
Priority to GB0127086A priority Critical patent/GB2381817B/en
Publication of GB0127086D0 publication Critical patent/GB0127086D0/en
Publication of GB2381817A publication Critical patent/GB2381817A/en
Application granted granted Critical
Publication of GB2381817B publication Critical patent/GB2381817B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

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

Landscapes

  • 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)

Abstract

An access cover frame and cover assembly comprises an upstanding frame portion 10, defining an opening for receiving an access cover 15. The frame consists of a first horizontal flange 11 which extends outwardly from the upstanding portion, and a plurality of second flanges 12 which extend inwardly from the upstanding frame portion. The access cover rests on seating elements which are secured or integral with the upstanding frame portion 10 and the second horizontal flanges 12. The frame may also comprise a plurality of narrower third horizontal flanges connecting the second flanges, extending inwards from the upstanding portion, both second and third flanges helping to stabilise the frame by preventing rotation and damaging the setting material. The upstanding frame may also be reinforced at the corners adjacent to the seating elements. The cover may comprise several pieces which may be triangular in shape, and the whole assembly, cover and frame, is manufactured by casting.

Description

<Desc/Clms Page number 1>
IMPROVEMENTS IN AND RELATING TO ACCESS COVERS This invention relates to an access cover frame and to an access cover in combination with such a frame.
According to a first aspect of the invention there is provided an access cover frame comprising an annular upstanding frame portion defining an opening for receiving an access cover, a first annular or substantially annular horizontal flange extending outwardly from the upstanding frame portion, a plurality of second horizontal flanges extending inwards from the upstanding frame portion and a plurality of seat elements for supporting the access cover, the seat elements being secured to or integral with the upstanding frame portion and the second flanges.
Preferably, each second flange is symmetrical with respect to a respective seat element.
Preferably, the access cover frame further comprises a plurality of third horizontal flanges extending inwards from the upstanding frame portion, the third flanges extending respectively between adjacent pairs of second flanges and being of smaller width than the second flanges.
<Desc/Clms Page number 2>
Preferably, the access cover frame has been formed by casting.
In one embodiment, the upstanding frame portion is extended outwards over the first flange at locations adjacent to the seat elements.
According to a second aspect of the invention there is provided an access cover frame according to the first aspect of the invention in combination with an access cover.
Preferably, the access cover comprises a plurality of cover parts which may be of triangular shape.
Preferably, the access cover has also been formed by casting.
The invention will now be more particularly described by way of example with reference to the accompanying drawings, in which : Figure 1 is a plan view of one embodiment of an access cover frame according to the first aspect of the present invention in combination with an access cover, Figure 2 is a plan view of the frame shown in Figure 1,
<Desc/Clms Page number 3>
Figure 3 is a section taken along the line III-III of Figure 2, Figure 4 is a section taken along the line IV-IV of Figure 2, Figure 5 is a section taken along the line V-V of Figure 2, and Figure 6 is a plan view of a second embodiment of an access cover frame according to the first aspect of the present invention in combination with an access cover.
Referring firstly to Figures 1 to 5, the access cover frame shown therein comprises an annular upstanding frame portion 10 of generally rectangular configuration, a first annular horizontal flange 11 extending outwardly from the upstanding frame portion 10, a plurality of second horizontal flanges 12 extending inwards from the upstanding frame portion 10 and a plurality of third horizontal flanges 13 extending inwards from the upstanding frame portion 10.
The frame is formed from a casting operation and the frame portion 10 and first, second and third flanges 11, 12 and 13 are formed integrally with one another.
The third flanges 13 extend respectively between adjacent pairs of second flanges 12 and are of smaller width than the second flanges.
<Desc/Clms Page number 4>
The access cover frame also comprises a plurality of seat elements 14 for supporting the access cover 15 (shown in Figure 1). The seat elements 14 are integral with the upstanding frame portion 10 and with respective second flanges 12.
As shown, there are six such seat elements 14 and a corresponding number of second flanges 12. Four of the seat elements 14 are at respective corners of the frame and two are located midway along the longer sides of the frame. The second flanges 12 are each symmetrical with respect to the respective seat elements 14. That is to say, the second flanges 12 extend in two directions away from each seat element 14 by equal distances.
The upstanding frame portion 10 also has four prising recesses 16 to enable the cover to be removed from the frame.
As shown in Figure 1, the cover 15 is made up of four triangular parts 15a, 15b, 15c and 15d. The cover 15 fits within the upstanding frame portion 10 and is supported on the seat elements 14.
Reinforcing ribs 17 are provided between the upstanding frame portion 10 and the horizontal flange 11.
The provision of the second flanges 12 spreads the downwards pressure at the
<Desc/Clms Page number 5>
comers of the frame. This reduces rotation of the frame and should, therefore, reduce the risk of premature mortar failure.
The differential in the width of the second and third flanges 12 and 13 results in the comers of the frame being stiffer than the sides and this increases the torsional stiffness differential between the seating areas (where the seat elements 14 are located) and the other areas of the frame.
The provision of the third flanges 13, in addition to the second flanges 12 allows grouting to take place on both sides of the upstanding frame portion 10.
The second and third flanges 12 and 13 respectively reduce the turning moment of the frame when bedded in concrete or other settable material and the smaller width of the third flanges relative to the second flanges avoids the use of unnecessary material where it is not required.
The frame shown in Figure 6 differs from that shown in Figures 1 to 5 in that the upstanding flange portion 10'is recessed outwards over the horizontal flange 11'at locations adjacent to the seat elements 14'. The cover 15'is again made up of four substantially triangular parts but shaped to fit within the modified shape of the upstanding frame portion 10'.
<Desc/Clms Page number 6>
Extending the upstanding frame portion 10'outwards over the first flange 11. at locations adjacent to the seat elements 14'increases the rigidity of the frame in the seating areas.
The embodiments described above are given by way of example only and various modifications will be apparent to persons skilled in the art without departing from the scope of the invention as defined by the appended claims. For example, the upstanding frame portion could be of generally square configuration and have a single cover or a cover made up of two triangular parts. The cover could also include more than four triangular parts.

Claims (7)

CLAIMS 1. An access cover frame comprising an annular upstanding frame portion defining an opening for receiving an access cover, a first annular or substantially annular horizontal flange extending outwardly from the upstanding frame portion, a plurality of second horizontal flanges extending inwards from the upstanding frame portion and a plurality of seat elements for supporting the access cover, the seat elements being secured to or integral with the upstanding frame portion and the second flanges. 2. An access cover frame as claimed in claim 1, wherein each second flange is symmetrical with respect to a respective seat element. 3. An access cover frame as claimed in claim 1 or claim 2, further comprising a plurality of third horizontal flanges extending inwards from the upstanding frame portion, the third flanges extending respectively between adjacent pairs of second flanges and being of smaller width than the second flanges. 4. An access cover frame as claimed in any one of the preceding claims, formed by casting. 5. An access cover frame as claimed in any one of the preceding claims, wherein the upstanding frame portion is extended outwards over the first flange at locations <Desc/Clms Page number 8> adjacent to the seat elements. 6. An access cover frame as claimed in any one of the preceding claims in combination with an access cover. 5 7. The combination of claim 6, wherein the access cover comprises a plurality of cover parts which may be of triangular shape. 8. The combination of claim 6 or claim 7, wherein the access cover has been formed by casting. <Desc/Clms Page number 9> Amendments to the claims have been filed as follows
1. An access cover frame comprising a continuous upstanding frame portion defining an opening for receiving an access cover, a first continuous or substantially continuous horizontal flange extending outwardly from the upstanding frame portion, a plurality of second horizontal flanges extending inwards from the upstanding frame portion, a plurality of third horizontal flanges extending inwards from the upstanding frame portion, the third flanges extending respectively between adjacent pairs of second flanges and being of smaller width than the second flanges, and a plurality of seat elements for supporting the access cover, the seat elements being secured to or integral with the upstanding frame portion and the second flanges and the first, second and third flanges allowing grouting to take place on both sides of the upstanding frame portion.
2. An access cover frame as claimed in claim 1, wherein each second flange is symmetrical with respect to a respective seat element.
3. An access cover frame as claimed in claim 1 or claim 2, formed by casting.
4. An access cover frame as claimed in any one of the preceding claims, wherein the upstanding frame portion is extended outwards over the first flange at locations
adjacent to the seat elements. i
<Desc/Clms Page number 10>
5. An access cover frame as claimed in any one of the preceding claims in combination with an access cover.
6. The combination of claim 5, wherein the access cover comprises a plurality of cover parts which may be of triangular shape.
7. The combination of claim 5 or claim 6, wherein the access cover has been formed by casting.
GB0127086A 2001-11-10 2001-11-10 Improvements in and relating to access covers Expired - Fee Related GB2381817B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB0127086A GB2381817B (en) 2001-11-10 2001-11-10 Improvements in and relating to access covers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0127086A GB2381817B (en) 2001-11-10 2001-11-10 Improvements in and relating to access covers

Publications (3)

Publication Number Publication Date
GB0127086D0 GB0127086D0 (en) 2002-01-02
GB2381817A true GB2381817A (en) 2003-05-14
GB2381817B GB2381817B (en) 2003-10-22

Family

ID=9925583

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0127086A Expired - Fee Related GB2381817B (en) 2001-11-10 2001-11-10 Improvements in and relating to access covers

Country Status (1)

Country Link
GB (1) GB2381817B (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1162434A (en) * 1967-03-14 1969-08-27 Brickhouse Foundry Ltd Improvements in or relating to Man-Hole Covers.
GB2085947A (en) * 1980-10-17 1982-05-06 Pont A Mousson Road inspection manhole
GB2134572A (en) * 1982-11-27 1984-08-15 Selflevel Covers Ag Removing manhole covers
GB2276405A (en) * 1993-03-24 1994-09-28 Francis Sidney Clark An adaptor frame for supporting a rectangular cover on a circular manhole opening.
GB2282171A (en) * 1993-09-25 1995-03-29 Glynwed Foundry Prod Ltd Road surface gratings
GB2291452A (en) * 1994-07-16 1996-01-24 Glynwed Foundry Prod Ltd Cover and frame assembly
GB2327965A (en) * 1997-07-31 1999-02-10 Stanton Plc A frame for a manhole cover

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1162434A (en) * 1967-03-14 1969-08-27 Brickhouse Foundry Ltd Improvements in or relating to Man-Hole Covers.
GB2085947A (en) * 1980-10-17 1982-05-06 Pont A Mousson Road inspection manhole
GB2134572A (en) * 1982-11-27 1984-08-15 Selflevel Covers Ag Removing manhole covers
GB2276405A (en) * 1993-03-24 1994-09-28 Francis Sidney Clark An adaptor frame for supporting a rectangular cover on a circular manhole opening.
GB2282171A (en) * 1993-09-25 1995-03-29 Glynwed Foundry Prod Ltd Road surface gratings
GB2291452A (en) * 1994-07-16 1996-01-24 Glynwed Foundry Prod Ltd Cover and frame assembly
GB2327965A (en) * 1997-07-31 1999-02-10 Stanton Plc A frame for a manhole cover

Also Published As

Publication number Publication date
GB2381817B (en) 2003-10-22
GB0127086D0 (en) 2002-01-02

Similar Documents

Publication Publication Date Title
US5720577A (en) Box culvert
EP0836665B1 (en) Wall structures for swimming pools
USD422061S (en) Drainage panel
CA2226497A1 (en) Modular formwork for concrete
WO2003066970A3 (en) Revetment block and mat
JP2009248708A (en) Battery mounting structure on vehicle
JPS58173228A (en) Frame of manhole
GB2381817A (en) Improvements in and relating to access covers
US5935482A (en) Plate to support a ceiling mould
JP4465131B2 (en) Double floor structure
JPS6126223Y2 (en)
KR200361960Y1 (en) Paper pallet
JP3329437B2 (en) Water tank ceiling reinforcement structure
JPH0978619A (en) Structure for fixing lid to lid support frame
JPH038996Y2 (en)
JP2002348895A (en) Underground structure cover
KR200403840Y1 (en) Inclined deck plate
JP2002531326A (en) Combination of supports and seals for hatch covers of cargo ships
JP2001348900A (en) Cover for underground structure
JPH0136717Y2 (en)
AU780218B2 (en) Improved cardboard box for perishable products
JPS6236796Y2 (en)
GB2385876A (en) Frame for manhole cover or gully grating
JPS62117999A (en) Lining structure of tunnel
EP1207111A1 (en) Improved cardboard box for perishable products

Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20121110