GB2124683A - Manhole cover and frame assemblies - Google Patents

Manhole cover and frame assemblies Download PDF

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Publication number
GB2124683A
GB2124683A GB08222153A GB8222153A GB2124683A GB 2124683 A GB2124683 A GB 2124683A GB 08222153 A GB08222153 A GB 08222153A GB 8222153 A GB8222153 A GB 8222153A GB 2124683 A GB2124683 A GB 2124683A
Authority
GB
United Kingdom
Prior art keywords
frame
cover
lip
ramps
upstanding wall
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB08222153A
Other versions
GB2124683B (en
Inventor
Dennis William Sains
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.)
BRICKHOUSE DUDLEY Manufacturing
Original Assignee
BRICKHOUSE DUDLEY Manufacturing
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 BRICKHOUSE DUDLEY Manufacturing filed Critical BRICKHOUSE DUDLEY Manufacturing
Priority to GB08222153A priority Critical patent/GB2124683B/en
Priority to FR8312594A priority patent/FR2531152B1/en
Publication of GB2124683A publication Critical patent/GB2124683A/en
Application granted granted Critical
Publication of GB2124683B publication Critical patent/GB2124683B/en
Expired 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

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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)

Abstract

In a cover and frame assembly wherein a rectangular manhole cover 26 has a depending peripheral lip 28 engaging a channel 18 around the frame 11, the channel base along one side of the frame is provided with one or more transverse ramps 22 leading to the top of the inner wall 16 of the channel so that after lifting at its remote side the cover can be slid up the ramps and removed from the frame. As shown, the lip 28 is extended at 32 into a corner part 25 of the frame in order to prevent rocking. Locking means (not shown) may be provided in the corner parts 25. <IMAGE>

Description

SPECIFICATION Improvements in or relating to cover and frame assemblies This invention relates to a cover and frame assembly of the type comprising a rectangular frame perimeter part having a substantially U-shaped groove therein extending around generally the entire frame, the inner periphery of the perimeter part providing one upstanding limb of the U, and defines an opening of the frame, a rectangular cover to close the opening, the cover having a depending lip receivable in the groove, whereby the cover and frame, when assembled, interengage. Such a cover and frame assembly will hereinafter be referred to as of the kind specified.
Previously, it has been necessary to lift the entire cover to remove the cover from the frame. This is inconvenient particularly where the cover is very heavy. It is thus an object of the present invention to provide a new or improved cover and frame assembly wherein removal of the cover from the frame is facilitated.
According to a first aspect of the invention we provide a cover and frame assembly of the kind specified wherein along one side of the perimeter part, the groove has in the trough thereof, a transverse upwardly inclined part, said part providing a ramp whereby as the cover is raised adjacent an opposite side of the frame so that the depending lip of the cover is lifted out of the groove at said opposite side of the frame, and the cover is moved outwardly of the frame from, and in a direction transverse to, said opposite side, the part of the depending lip of the cover in the groove at said one side rides up the ramp to raise the cover adjacent said one side of the frame to clear the lip of the frame whereby the cover may be slid from the frame.
Accordingly, it is only necessary to lift one side of the cover and to slide the cover from the frame to effect removal.
Preferably, the frame is of substantially L-shape in section, the upstanding limb being provided at the end of the horizontal part of the L, the vertical part providing an upstanding wall within the bounds of which the cover is received. The frame may further comprise a flange extending horizontally outwardly of the upstanding wall, towards the bottom of the wall which flange is adapted to be embedded in the ground, the perimeter part of the frame comprising the horizontal part of the L extending inwardly of the upstanding wall of the frame.
The upstanding wall thus may provide the other limb of the U-shaped groove, the trough extending between the upstanding wall and the upwardly extending limb.
In one embodiment, the groove is wider at the corners of the frame than along the sides thereof and locking means may be provided in the corners to lock the cover in the frame if required. The depending lip of the cover may include side parts which extend along the sides of the cover, and corner parts which are received in the corners of the frame. If desired, the side parts of the depending lip of the cover, corresponding to said one side of the frame in which the ramp is located, may extend beyond the corner part into the corner of the frame, to prevent the cover rocking in the frame.
Preferably, a plurality of transversely upwardly inclined parts providing ramps are located in the groove of the perimeter part at said one side, and if desired also at said opposite side whereby the cover may be slid from the frame outwardly from either side. The ramp or ramps may extend perpendicular ly relative to the upstanding lip and upstanding wall of the frame at the respective side, although may be relatively inclined if required.
According to a second aspect of the invention we provide a method of removing a cover from a frame in a cover and frame assembly of the kind specified, the frame having in a trough of the groove along one side of the perimeter part, a transverse upwardly inclined part extending inwardly of the frame to provide a ramp, said method including the steps of raising the cover adjacent an opposite side of the frame so that the depending lip of the cover is lifted out of the groove at said opposite side of the frame, moving the cover outwardly of the frame from, and in a direction transverse to, said opposite side whereby the part of the lip in the groove at said one side rides up the ramp to raise the cover adjacent said one side of the frame to clear the upstanding limb of the frame, and continuing to move the cover outwardly to slide the cover from the frame.
The method according to the second aspect of the invention may utilise a cover and frame assembly having any of the features describes with respect to the first aspect of the invention.
The invention will now be described with the aid of the accompanying drawings in which Figure lisa plan view of part of the cover and frame assembly according to the first aspect of the invention, for use in a method according to the second aspect of the invention.
Figure 2 is a fragmentary section along the lines ll-ll of Figure 1.
Referring to the drawings, a cover and frame assembly 10 comprises a rectangular frame 11 having an upstanding wall 12 with an outwardly extending flange 13, at the bottom thereof, the flange 13 having slots 14 therein to facilitate embed ding the frame 11 in the ground. Extending inwardly of the upstanding wall 12 is a perimeter part 15 having an inner upstanding peripheral limb 16 defining an opening 17 in the frame 11, and the limb 16 providing one limb of a substantially U-shaped groove 18 in the perimeter part 15, the other limb of the U being provided by the upstanding wall 12.
The perimeter part 15 has four sides only two of which are indicated at 20 and 21, although the opposite sides to side is identical to side 20 and the opposite side to side 21 is identical to side 21.
Between each pair of sides 20, 21 a corner part 25 is provided, the part of the limb 16 at the corner 25 being inclined relative to each pair of sides 20, 21.
At each of two opposite sides 20, within the groove 18 of the peripheral part 15 are located three transverse upwardly inclined parts 22 (only one of which can be seen) which provide ramps to enable a cover 26 received in the frame 11 to be slid from the frame as hereinafter described. The ramps 22 only extend partly across the perimeter part 15 and are each parallel to one another and perpendicular to the limb 16 and upstanding wall 12.
The cover 26 is received entirely within the boundry of the upstanding wall 12 and comprises a horizontal cover part 27 and a depending lip 28 adjacent the periphery thereof.
The lip 28 is received in the groove 18 of the peripheral part 15 of the frame 11 so that the cover 26 and frame 11 interengage, and it can be seen that part 29 of the lip 28 which is received in the side 20 of the groove 18 in which the ramps 22 are received, exends to the foot of the ramps 22 only, but does not rest on the ramps 22.
The lip 28 comprises side parts 29, 30 and corner parts 31 inclined relative to the side parts 29, 30 and received in the corners 25 of the perimeter part 15.
The sides 29 of the lip 28 are extended into the corners 25 as shown at 32 and thus prevent the cove 26 from rocking in the frame 11.
To remove the cover 26 from the frame 11, the following procedure is adopted.
First, the cover 26 is lifted at one side on which the lip parts in 29 are provided until that part 29 of the depending lip 29 of the cover 26 is lifted clear of the upstanding wall 12. Prising slots may be provided beween the cover 26 and frame 12 to facilitate the use of a lever or other tool if required. Alternatively, key slots may be provided in the horizontal part 27 of the cover 26.
The cover 26 is then moved outwardly of the frame 11 from the side 20. As this movement occurs, the part 29 of the lip 28 on the opposite side of the corner 26 will ride up the ramps 22 to lift that side of the cover 26. By continuing this sliding movement, the cover 26 can be slid from the frame, with sides 30 of the lip 28 of the cover 26 sliding initially along the top of limb 16 and then on the top 35 of the upstanding wall 12.
Preferably the top 35 of the upstanding wall 12, and lower edge 36 of the lip 28 are radiused to facilitate this sliding although this is not shown in Figure 2. Of course many modifications are possible.
For example, ramps 22 may be provided on each of the four sides 20,21 of the frame 11 so that the cover 26 can be slid out from any side, although this can make the frame unduly heavy.
Instead of three ramps 22 on each side, only one wider, ramp may be provided, or two spaced ramps or more than three ramps may be provided. The ramps 22 need not extend perpendicularly to the lip 16 and wall 12 as shown, but may be inclined relative thereto as required.
Depending lip 28 need not be continuous as shown, but may be contoured although in this case less efficient sealing between the cover and frame would probably occur and problem could occur in, lifting the corner 26 from the frame 11. Extensions 32 to the lip 28 into the corner 25 of the frame, need not be present but some other anti-rocking formation be provided. Locking means may be provide in the corners 25 for locking the cover 26 to the frame 11 if required. Outwardly extending flange 13 is an optional feature and need not be provided, or should be considerably modified as desired. As shown, there is a small gap 36 between the cover 26 and frame 11,which gap 36 may be larger or smaller as required. The cover 26 need not be retained within the boundary of the upstanding wall 12, but part or parts of the cover 26 may extend outwardly of the upstanding wall 12.
As shown, the top 35 of the upstanding wall 12 is approximately level with the upper surface of the horizontal part 27 of the cover 26, although this need not be so if required.
Such a cover and frame assembly as that described is conventionally made in case iron but may be fabricated in any other way, and is used to close a manhole such as that which gives access for a man, to a sewer or the like beneath. However, a cover and frame assembly embodying the invention may be used to close any other access opening as required.
CLAIMS (Filed on 21 June 1983) 1. A cover and frame assembly of the kind specified wherein along one side of the perimeter part, the groove has in the trough thereof, a transverse upwardly inclined part, said part providing a ramp whereby as the cover is raised adjacent an opposite side of the frame so that the depending lip of the cover is lifted out of the groove at said opposite side of the frame, and the cover is moved outwardly of the frame from, and in a direction transverse to, said opposite side, the part of the depending lip of the cover in the groove at said one side rides up the ramp to raise the cover adjacent said one side of the frame to clear the limb of the frame whereby the cover may be slid from the frame.
2. An assembly according to Claim 1 wherein the frame is of substantially L-shape in section, the upstanding limb being provided at the end of the horizontal part of the L, the vertical part providing an upstanding wall within the bounds of which the cover is received.
3. An assembly according to Claim 2 wherein the frame comprises a flange extending horizontally outwardly of the upstanding wall, towards the bottom of the wall which flange is adapted to be embedded in the ground, the perimeter part of the frame comprising the horizontal part of the L extending inwardly of the upstanding wall of the frame.
4. An assembly according to Claim 3 wherein the upstanding wall provides the other limb of the U-shaped groove, the trough extending between the upstanding wall and the upwardly extending limb.
5. An assembly according to any one of the preceding claims wherein the groove is wider at the corners of the frame than along the sides thereof, locking means being provided in the corners to lock the cover in the frame.
6. An assembly according to any one of the preceding claims wherein the depending lip of the cover includes side parts which extend along the sides of the cover, and corner parts which are received in the corners of the frame.
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (15)

  1. **WARNING** start of CLMS field may overlap end of DESC **.
    cover 26 received in the frame 11 to be slid from the frame as hereinafter described. The ramps 22 only extend partly across the perimeter part 15 and are each parallel to one another and perpendicular to the limb 16 and upstanding wall 12.
    The cover 26 is received entirely within the boundry of the upstanding wall 12 and comprises a horizontal cover part 27 and a depending lip 28 adjacent the periphery thereof.
    The lip 28 is received in the groove 18 of the peripheral part 15 of the frame 11 so that the cover 26 and frame 11 interengage, and it can be seen that part 29 of the lip 28 which is received in the side 20 of the groove 18 in which the ramps 22 are received, exends to the foot of the ramps 22 only, but does not rest on the ramps 22.
    The lip 28 comprises side parts 29, 30 and corner parts 31 inclined relative to the side parts 29, 30 and received in the corners 25 of the perimeter part 15.
    The sides 29 of the lip 28 are extended into the corners 25 as shown at 32 and thus prevent the cove 26 from rocking in the frame 11.
    To remove the cover 26 from the frame 11, the following procedure is adopted.
    First, the cover 26 is lifted at one side on which the lip parts in 29 are provided until that part 29 of the depending lip 29 of the cover 26 is lifted clear of the upstanding wall 12. Prising slots may be provided beween the cover 26 and frame 12 to facilitate the use of a lever or other tool if required. Alternatively, key slots may be provided in the horizontal part 27 of the cover 26.
    The cover 26 is then moved outwardly of the frame 11 from the side 20. As this movement occurs, the part 29 of the lip 28 on the opposite side of the corner 26 will ride up the ramps 22 to lift that side of the cover 26. By continuing this sliding movement, the cover 26 can be slid from the frame, with sides 30 of the lip 28 of the cover 26 sliding initially along the top of limb 16 and then on the top 35 of the upstanding wall 12.
    Preferably the top 35 of the upstanding wall 12, and lower edge 36 of the lip 28 are radiused to facilitate this sliding although this is not shown in Figure 2. Of course many modifications are possible.
    For example, ramps 22 may be provided on each of the four sides 20,21 of the frame 11 so that the cover 26 can be slid out from any side, although this can make the frame unduly heavy.
    Instead of three ramps 22 on each side, only one wider, ramp may be provided, or two spaced ramps or more than three ramps may be provided. The ramps 22 need not extend perpendicularly to the lip
    16 and wall 12 as shown, but may be inclined relative thereto as required.
    Depending lip 28 need not be continuous as shown, but may be contoured although in this case less efficient sealing between the cover and frame would probably occur and problem could occur in, lifting the corner 26 from the frame 11. Extensions 32 to the lip 28 into the corner 25 of the frame, need not be present but some other anti-rocking formation be provided. Locking means may be provide in the corners 25 for locking the cover 26 to the frame 11 if required. Outwardly extending flange 13 is an optional feature and need not be provided, or should be considerably modified as desired. As shown, there is a small gap 36 between the cover 26 and frame 11,which gap 36 may be larger or smaller as required. The cover 26 need not be retained within the boundary of the upstanding wall 12, but part or parts of the cover 26 may extend outwardly of the upstanding wall 12.
    As shown, the top 35 of the upstanding wall 12 is approximately level with the upper surface of the horizontal part 27 of the cover 26, although this need not be so if required.
    Such a cover and frame assembly as that described is conventionally made in case iron but may be fabricated in any other way, and is used to close a manhole such as that which gives access for a man, to a sewer or the like beneath. However, a cover and frame assembly embodying the invention may be used to close any other access opening as required.
    CLAIMS (Filed on 21 June 1983) 1. A cover and frame assembly of the kind specified wherein along one side of the perimeter part, the groove has in the trough thereof, a transverse upwardly inclined part, said part providing a ramp whereby as the cover is raised adjacent an opposite side of the frame so that the depending lip of the cover is lifted out of the groove at said opposite side of the frame, and the cover is moved outwardly of the frame from, and in a direction transverse to, said opposite side, the part of the depending lip of the cover in the groove at said one side rides up the ramp to raise the cover adjacent said one side of the frame to clear the limb of the frame whereby the cover may be slid from the frame.
  2. 2. An assembly according to Claim 1 wherein the frame is of substantially L-shape in section, the upstanding limb being provided at the end of the horizontal part of the L, the vertical part providing an upstanding wall within the bounds of which the cover is received.
  3. 3. An assembly according to Claim 2 wherein the frame comprises a flange extending horizontally outwardly of the upstanding wall, towards the bottom of the wall which flange is adapted to be embedded in the ground, the perimeter part of the frame comprising the horizontal part of the L extending inwardly of the upstanding wall of the frame.
  4. 4. An assembly according to Claim 3 wherein the upstanding wall provides the other limb of the U-shaped groove, the trough extending between the upstanding wall and the upwardly extending limb.
  5. 5. An assembly according to any one of the preceding claims wherein the groove is wider at the corners of the frame than along the sides thereof, locking means being provided in the corners to lock the cover in the frame.
  6. 6. An assembly according to any one of the preceding claims wherein the depending lip of the cover includes side parts which extend along the sides of the cover, and corner parts which are received in the corners of the frame.
  7. 7. An assembly according to Claim 6 wherein the
    side parts of the depending lip of the cover, corresponding to said one side of the frame in which the ramp is located, extend beyond the corner part into the corner of the frame, to prevent the cover rocking in the frame.
  8. 8. An assembly according to any one of the preceding claims wherein a plurality of transversely upwardly inclined parts providing ramps are located in the groove of the perimeter part at said one side.
  9. 9. An assembly according to Claim 8 wherein a plurality of ramps are also provided at said opposite side whereby the cover may be slid from the frame outwardly from either side.
  10. 10. An assembly accordng to any one of Claims 2 to 9 where appendant to Claim 2 wherein the ramp or ramps extend perpendicularly relative to the upstanding limb and upstanding wall of the frame at the respective side.
  11. 11. A method of removing a cover from a frame in a cover and frame assembly of the kind specified, the frame having in a trough of the groove along one side of the perimeter part, a transverse upwardly inclined part extending inwardly of the frame to provide a ramp, said method including the steps of raising the cover adjacent an opposite side of the frame so that the depending lip of the cover is lifted out of the groove at said opposite side of the frame, moving the cover outwardly of the frame from, and in a direction transverse to, said opposite side whereby the part of the lip in the groove at said one side rides up to the ramp to raise the cover adjacent said one side of the frame to clear the upstanding limb of the frame, and continuing to move the cover outwardly to slide the cover from the frame.
  12. 12. A method according to Claim 11 utilised for a cover and frame assembly according to any one of Claims 1 to 10.
  13. 13. A cover and frame assembly substantially as hereinbefore described with reference to and as shown in the accompanying drawings.
  14. 14. A method of removing a cover from a frame substantially as hereinbefore described with reference to the accompanying drawings.
  15. 15. Any novel feature or novel combination of features disclosed herein and/or shown in the accompanying drawings.
GB08222153A 1982-07-31 1982-07-31 Manhole cover and frame assemblies Expired GB2124683B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB08222153A GB2124683B (en) 1982-07-31 1982-07-31 Manhole cover and frame assemblies
FR8312594A FR2531152B1 (en) 1982-07-31 1983-07-29 ASSEMBLY COMPRISING A FRAME AND A COVER, AND METHOD FOR REMOVING THE COVER FROM THE FRAME IN AN ASSEMBLY OF THIS TYPE

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB08222153A GB2124683B (en) 1982-07-31 1982-07-31 Manhole cover and frame assemblies

Publications (2)

Publication Number Publication Date
GB2124683A true GB2124683A (en) 1984-02-22
GB2124683B GB2124683B (en) 1985-10-09

Family

ID=10532046

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08222153A Expired GB2124683B (en) 1982-07-31 1982-07-31 Manhole cover and frame assemblies

Country Status (2)

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FR (1) FR2531152B1 (en)
GB (1) GB2124683B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2134572A (en) * 1982-11-27 1984-08-15 Selflevel Covers Ag Removing manhole covers
GB2315793A (en) * 1996-07-26 1998-02-11 Glynwed Foundry Prod Ltd Cover and frame assembly

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2793267B1 (en) 1999-05-05 2001-06-15 Pont A Mousson ROAD DEVICE AND COVERING ELEMENT FOR SUCH A DEVICE

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB209324A (en) * 1923-02-23 1924-01-10 John Edmund Blakeborough Improvements in manhole and like covers and frames therefor
GB606014A (en) * 1945-12-17 1948-08-05 Broad & Company Ltd Improvements in or relating to manhole or other covers and frames

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH162940A (en) * 1932-07-14 1933-07-31 Von Roll Ag Manhole cover.
GB414155A (en) * 1933-02-11 1934-08-02 Henleys Telegraph Works Co Ltd Improvements in covers and frames for manholes and other openings in roadways and pavements
GB602047A (en) * 1945-10-12 1948-05-19 Robinson & Kershaw Ltd Improvements relating to manhole covers and the like
GB1493357A (en) * 1974-03-14 1977-11-30 British Steel Corp Manhole assemblies
LU71203A1 (en) * 1974-05-15 1975-04-17

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB209324A (en) * 1923-02-23 1924-01-10 John Edmund Blakeborough Improvements in manhole and like covers and frames therefor
GB606014A (en) * 1945-12-17 1948-08-05 Broad & Company Ltd Improvements in or relating to manhole or other covers and frames

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2134572A (en) * 1982-11-27 1984-08-15 Selflevel Covers Ag Removing manhole covers
GB2315793A (en) * 1996-07-26 1998-02-11 Glynwed Foundry Prod Ltd Cover and frame assembly
GB2315793B (en) * 1996-07-26 2000-12-27 Glynwed Foundry Products Ltd Cover and frame assembly

Also Published As

Publication number Publication date
GB2124683B (en) 1985-10-09
FR2531152B1 (en) 1985-07-05
FR2531152A1 (en) 1984-02-03

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PE20 Patent expired after termination of 20 years

Effective date: 20020730