GB2175630A - Locking and/or lifting means for a manhole cover - Google Patents
Locking and/or lifting means for a manhole cover Download PDFInfo
- Publication number
- GB2175630A GB2175630A GB08513376A GB8513376A GB2175630A GB 2175630 A GB2175630 A GB 2175630A GB 08513376 A GB08513376 A GB 08513376A GB 8513376 A GB8513376 A GB 8513376A GB 2175630 A GB2175630 A GB 2175630A
- Authority
- GB
- United Kingdom
- Prior art keywords
- manhole cover
- bolt
- corner region
- supporting frame
- threaded
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
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
- E02D29/1427—Locking devices
Abstract
A manhole cover has at least one corner region (3) which defines a hollow chamber (7) within which an internally threaded hollow member (9) is secured in coaxial alignment with upper and lower apertures (11,13) formed in the corner region (3). In use the manhole cover (1) is located on a supporting frame (19) and a bolt (15) is passed with clearance through the upper aperture (11), the hollow member (9) and the lower aperture (13). The bolt (15) is screwed into the supporting frame (19) thus locking the manhole cover (1) in position. With the or each bolt (15) removed a threaded tool can be positively engaged in the threaded bore (17) in hollow member (9) so that the manhole cover can be positively and safely lifted off the supporting frame (19). <IMAGE>
Description
SPECIFICATION
Improvements relating to manhole covers and
their supporting frames
The present invention relates to a manhole cover
and a manhole cover in combination with its sup
porting frame.
In particular the present invention relates to a
manhole cover of the type which has a recess
which is filled with blocks or other material to
match the prepared surface surrounding the man
hole. Thus only the upper surface of the outer pe
rimeter of the manhole cover is visible to the eye
when the cover is in use; the cover therefore
blending with the aesthetics of the area.
Manhole covers of the above type have corner
regions in which a small hole is provided, it being
thus possible to lift the manhole by first inserting a small tool which can engage the undersurface of
the corner region into which it is inserted. This tool
is however a loose fit in the hole and can become
detached from the cover during lifting. Further, if
the manhole cover is to be locked to its supporting
frame, then appropriate locking means are built
into the recess of the cover. This reduces the area
of the recess which matches the surrounding re
gion, and thus detrimentally affects the aesthetics
of the area.
The aim of the present invention is to provide a
manhole cover which can be safely lifted and
which can be simply locked to its supporting
frame; the locking means being such as to main
tain the maximum possible area for said recess.
According to the present invention there is pro
vided a manhole cover having a corner region
through which an at least partially threaded bore
extends.
According to a further aspect of the present in
vention there is provided a manhole cover in com
bination with a supporting frame, the manhole
cover having a corner region through which an at
least partially threaded bore extends, a bolt ex
tending through said bore and being screwed into
a further threaded bore in the said supporting
frame.
Thus, by virtue of the present invention a
threaded tool can be screwed into the at least par
tially threaded bore to enable the manhole cover to
be positively and safely lifted, and in accord with
the further aspect of the present invention, the
same bore is used to bolt the cover to the frame.
The corner region is thus adapted both for safe lift
ing and for positive locking without requiring sepa
rate locking means which can detract from the
aesthetics of the installation.
In a preferred embodiment of the present inven
tion the manhole cover and supporting frame are
rectangular and each corner region has a hollow
chamber within which an internally threaded hol
low tube is welded in coaxial alignment with upper
and lower apertures fdrmed in the corner region.
The upper aperture is preferably large enough to
allow the head of the bolt to pass through and the
upper end of the tube is likewise recessed so that the bolt when screwed to the supporting frame, is flush or recessed with respect to the upper surface of the manhole cover. The bolt(s) preferably engage in a threaded tube welded to the frame to thus lock the cover in position. If a cover is not to be bolted to the supporting frame then the upper apertures of each corner region can be closed by, for example, plastic plugs which may be removed for lifting.
The present invention will now be further described, by way of example, with reference to the accompanying drawings in which:
Figure 1 is a perspective view of a manhole cover and supporting frame according to the present invention, in spaced apart relationship; and
Figure 2 is a cross-sectional view of a corner region of the cover and frame of Figure 1, locked together.
A rectangular manhole cover (1) is illustrated in the accompanying drawings, the cover (1) having four corner regions (3) and a recess which is, by way of example, filled with an arrangement of blocks (5) to match the surrounding area.
As best seen in Figure 2, each corner region (3) defines a hollow chamber (7) within which a hollow tube (9) is welded in alignment with an upper aperture (11) and a lower aperture (13) in the walls of said chamber (7). The tube (9) is recessed at its upper end to receive the head of a bolt (15), and is partially threaded at (17) for engagement with a complimentarily threaded lifting tool (not shown).
A supporting frame (19) for the manhole cover (1) is generally rectangular and as best seen in Figure 2, a threaded tube (21) is welded to the frame (19) in alignment with the said upper and lower apertures (11, 13) of the cover (1). Thus with the manhole cover (1) located in position in the supporting frame 19, (as shown in Figure 2), the bolt (15) can be inserted through the tube (9) and screwed into the threaded tube (21) welded to the frame (19), to thus lock the cover (1) to the frame (19). The head of the bolt (15) engages in the recess at the upper end of tube (9) and is thus flush or slightly recessed with respect to ground level.
As evident from the recess (23) on the head of bolt (15), the bolt (15) can be tightened or released using an Allen key. Alternative bolt designs can of course be utilised.
In use, the bolts (15) can be removed from each corner region (3), to release the manhole cover (1) to enable the cover to be positively and safely lifted. Thus both lifting and locking means are provided in the corner regions so that the maximum area is available for the said blocks (5) to thus maximise the aesthetic blending of the manhole cover (1) to its surroundings.
If the manhole cover (1) is not to be locked to its supporting frame (19) the plastic plugs (not shown) may be used to aesthetically close the upper aperture (11) of each corner region (3). These plugs can of course be easily removed when the manhole cover has to be lifted.
Claims (12)
1. A manhole cover having a corner region through which an at least partially threaded bore extends.
2. A manhole cover as claimed in claim 1, in which the corner region has a hollow chamber within which an internally threaded hollow member is secured in coaxial alignment with upper and lower apertures formed in the corner region.
3. A manhole cover as claimed in claim 1 or claim 2, in which the manhole cover is rectangular.
4. A manhole cover as claimed in any one of claims 1 to 3, in which a threaded tool is screwed into said at least partially threaded bore.
5. A manhole cover in combination with a supporting frame, the manhole cover having a corner region through which an at least 1 , a bolt extending through said partially threaded bore extends bore and being screwed into a further threaded bore in the said supporting frame.
6. A combination as claimed in claim 5, in which the corner region has a hollow chamber within which an internally threaded hollow member is secured in coaxial alignment with upper and lower apertures formed in the corner region, the bolt extending with clearance through said threaded hlow member.
7. A combination as claimed in claim 6, in which the upper aperture is large enough to allow the head of the bolt to pass therethrough, with the hollow member being recessed to receive the bolt head.
8. A combination as claimed in any one of cLaims 5, 6 or 7, in which the bolt is screwed into a threaded tube secured to the supporting frame.
9. A combination as claimed in any one of claims 5 to 8, in which a resilient plug closes off said bore when the manhole is in position.
10. A combination as claimed in any one of claims 5 to 9, in which the manhols cover and supporting frame are rectangular.
11. A combination as claimed in any one of claims 5 to 10, in which the bolt is flush or recessed with respect to the upper surface of the manhole cover.
12. A manhole cover constructed and arranged substantially as hereinbefore described with reference to and as illustrated in the accompanying drawings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08513376A GB2175630A (en) | 1985-05-28 | 1985-05-28 | Locking and/or lifting means for a manhole cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08513376A GB2175630A (en) | 1985-05-28 | 1985-05-28 | Locking and/or lifting means for a manhole cover |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB8513376D0 GB8513376D0 (en) | 1985-07-03 |
| GB2175630A true GB2175630A (en) | 1986-12-03 |
Family
ID=10579750
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08513376A Withdrawn GB2175630A (en) | 1985-05-28 | 1985-05-28 | Locking and/or lifting means for a manhole cover |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2175630A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2318376A (en) * | 1996-09-20 | 1998-04-22 | Camas Uk Ltd | Duct cover assembly. |
| GB2355028A (en) * | 1999-10-07 | 2001-04-11 | Martin Thompson | Panel with a reinforced insert for engagement with a lifting tool |
| US20120311956A1 (en) * | 2011-06-07 | 2012-12-13 | Akkala Steven M | Grating systems incorporating decorative articles |
| EP2740848A3 (en) * | 2012-12-10 | 2017-03-15 | Yucon Solutions BVBA | Ground cover, lifting element, sealing element and method for the lifting thereof |
| US9919853B2 (en) | 2010-11-10 | 2018-03-20 | Oldcastle Precast, Inc. | Locking subgrade vault |
| GB2564148A (en) * | 2017-07-05 | 2019-01-09 | Nal Ltd | Access System |
| US10197088B2 (en) | 2011-11-10 | 2019-02-05 | Oldcastle Precast, Inc. | Tamper resistant closure mechanism for a utility vault |
| US10240316B2 (en) | 2012-11-16 | 2019-03-26 | Oldcastle Precast, Inc. | Locking subgrade vault |
| US11066803B2 (en) | 2012-11-16 | 2021-07-20 | Oldcastle Infrastructure, Inc. | Locking subgrade vault |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1146315A (en) * | 1966-05-13 | 1969-03-26 | Broads Mfg Company Ltd | Improvements relating to access cover assemblies |
| GB2027472A (en) * | 1978-07-28 | 1980-02-20 | Brickhouse Dudley Ltd | Road surface boxes |
-
1985
- 1985-05-28 GB GB08513376A patent/GB2175630A/en not_active Withdrawn
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1146315A (en) * | 1966-05-13 | 1969-03-26 | Broads Mfg Company Ltd | Improvements relating to access cover assemblies |
| GB2027472A (en) * | 1978-07-28 | 1980-02-20 | Brickhouse Dudley Ltd | Road surface boxes |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2318376A (en) * | 1996-09-20 | 1998-04-22 | Camas Uk Ltd | Duct cover assembly. |
| GB2355028A (en) * | 1999-10-07 | 2001-04-11 | Martin Thompson | Panel with a reinforced insert for engagement with a lifting tool |
| US9919853B2 (en) | 2010-11-10 | 2018-03-20 | Oldcastle Precast, Inc. | Locking subgrade vault |
| US9932157B2 (en) | 2010-11-10 | 2018-04-03 | Oldcastle Precast, Inc. | Locking subgrade vault |
| USD841279S1 (en) | 2010-11-10 | 2019-02-19 | Oldcastle Precast, Inc. | Subgrade vault |
| US20120311956A1 (en) * | 2011-06-07 | 2012-12-13 | Akkala Steven M | Grating systems incorporating decorative articles |
| US10197088B2 (en) | 2011-11-10 | 2019-02-05 | Oldcastle Precast, Inc. | Tamper resistant closure mechanism for a utility vault |
| US10240316B2 (en) | 2012-11-16 | 2019-03-26 | Oldcastle Precast, Inc. | Locking subgrade vault |
| US11066803B2 (en) | 2012-11-16 | 2021-07-20 | Oldcastle Infrastructure, Inc. | Locking subgrade vault |
| EP2740848A3 (en) * | 2012-12-10 | 2017-03-15 | Yucon Solutions BVBA | Ground cover, lifting element, sealing element and method for the lifting thereof |
| GB2564148A (en) * | 2017-07-05 | 2019-01-09 | Nal Ltd | Access System |
| GB2564148B (en) * | 2017-07-05 | 2022-03-02 | Nal Ltd | Access System |
Also Published As
| Publication number | Publication date |
|---|---|
| GB8513376D0 (en) | 1985-07-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |