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GB2170846A - Seal for the lifting eye of an access cover unit - Google Patents

Seal for the lifting eye of an access cover unit Download PDF

Info

Publication number
GB2170846A
GB2170846A GB08602858A GB8602858A GB2170846A GB 2170846 A GB2170846 A GB 2170846A GB 08602858 A GB08602858 A GB 08602858A GB 8602858 A GB8602858 A GB 8602858A GB 2170846 A GB2170846 A GB 2170846A
Authority
GB
United Kingdom
Prior art keywords
cover
neck portion
seal
hole
lifting
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
GB08602858A
Other versions
GB2170846B (en
GB8602858D0 (en
Inventor
Rolfe Lionel Hancher
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.)
Duct & Access Covers Ltd
Original Assignee
Duct & Access Covers 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 Duct & Access Covers Ltd filed Critical Duct & Access Covers Ltd
Publication of GB8602858D0 publication Critical patent/GB8602858D0/en
Publication of GB2170846A publication Critical patent/GB2170846A/en
Application granted granted Critical
Publication of GB2170846B publication Critical patent/GB2170846B/en
Expired 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)
  • Details Or Accessories Of Spraying Plant Or Apparatus (AREA)

Abstract

A seal (4) for a lifting eye for use with access or ducting covers which do not require to be welded to the cover and which obviate the need to galvanise the cover after fabrication, said seal (4) comprising a hollow neck portion (3), securing means (6) for securing the neck portion (3) within the lifting eye and a cup shaped portion (7) connected to the hollow neck portion (3) which defines a compartment (10) beneath the cover (1) which is only accessible through the hollow neck portion (3). <IMAGE>

Description

SPECIFICATION Cover unit The present invention relates to a seal and in particular to a seal for a lifting eye of a duct or access cover. A lifting eye is a hole through which a lifting key can be inserted to lift the cover.
It is known to manufacture duct and access covers which are pressed out to the required shape from mild steel. Lifting eyes are punched through the cover into which a lifting key can be inserted and locked to allow the cover to be lifted and moved. Usually a metal cup shaped cover is welded or otherwise fixed to the underside of the cover to define a containment area immediately below the lifting eyes. The cover does not impede insertion of the lifting key into the lifting eye, but does prevent anything from passing through the hole from one side of the cover to the other.
This includes, for example, gases beneath the cover and contaminants from outside the cover. The cover may be previously galvanised or painted according to requirements.
The requirement to weld the lifting eye covers, pockets or bars to the cover itself reduces the production rate of the covers, as does the final stage of galvanisation or painting. In addition, where the cover is galvanised after pressing it can be prone to distortion.
It is an object of the present invention to provide a lifting eye cover for use with access and ducting covers which do not require to be welded to the cover and which obviate the need to galvanise the cover after fabrication thereof has been completed.
According to the present invention there is provided a seal for a lifting eye of a duct or access cover comprising a hollow neck portion adapted in use to be received within a lifting eye, securing means for securing the neck portion within the lifting eye and a cup shaped portion connected to the hollow neck portion which defines a comparment beneath the duct or access cover which is only accessible through the hollow neck portion.
Preferably, the means for retaining the neck portion within the eye hole comprises a resiliently deformable lip around the top edge of the neck portion, which lip portion is of greater outer dimensions than the eye hole, but is resiliently deformable to pass therethrough in one direction and maintain the seal in position.
Preferably, the seal is comprised of a plastics material.
An embodiment of the present invention will now be described, by way of example, with reference to the accompanying drawing, which shows a section through a seal embodying the present invention mounted in an access cover.
Referring to the accompanying drawing there is shown an access cover 1 which has been pressed from a sheet of mild steel, and in the centre of which has been punched a hole defined by sides 2. Within the hole is received the neck portion 3 of a seal 4 embodying the present invention. The outer perimeter of the neck portion 3 is of substantially the same shape as the hole in the cover 1, but is slightly smaller to allow it to be received therein. An elongate hole 5 is provided through the neck portion 3 through which the end of locking key can be inserted. A resiliently deformable lip portion 6 is provided around the tope edge of the neck portion 3 which is of slightly greater outer dimensions than the hole in the cover 1. The upper surface of the lip portion 6 is inclined to allow it to gradually deform as it is pushed into and through the hole in the cover 1.However, once through the hole in the cover 1 the lip portion 6 resumes its normal shape and dimensions. In this respect, the lower surface of the lip portion 6 is flat and being of greater dimensions than the hole in the cover 1 the flat lower surface of the lip portion 6 abuts against the top surface of the cover 1 ensuring that the neck portion 3 is securely held therein.
The seal 4 further comprises a cup shaped portion 7 which is secured to an extension 8 of the neck portion 3 by means of complimentary snap-fitting projections 8. The cup shaped portion 7 defines a compartment 10 which opens into the hole 5 in the neck portion 3 and is large enough to allow the end of a locking key inserted therein through the hole 5 in the neck portion 3 to be rotated and locked therein beneath the neck portion 3.
A plug 11 which fits the hole 5 in the neck portion 3 protects the lip portion 6 from damage and ensures that nothing is dropped into the compartment when the cover embodying the present invention is not in use.
The use of the seal according to the present invention obviates the need to weld a cup to the bottom surface of a ducting or access cover. This means that the cover can be made of pre-coated steel i.e. galvanised sheets. Moreover as there is no need to galvanise the cover after fabrication there is less likelihood of the cover distorting and production rates can be much increased.
Finally, it will be appreciated that whilst the seal embodying the present invention has a three part construction consisting of a neck portion, cup shaped portion and plug, the plug may be dispersed with, and the neck portion and cup shaped portion may be formed as a single piece i.e. from a plastics material using blow moulding techniques.
1. A seal for a lifting eye of a duct or access cover comprising a hollow neck portion adapted in use to be received within a
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (4)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Cover unit The present invention relates to a seal and in particular to a seal for a lifting eye of a duct or access cover. A lifting eye is a hole through which a lifting key can be inserted to lift the cover. It is known to manufacture duct and access covers which are pressed out to the required shape from mild steel. Lifting eyes are punched through the cover into which a lifting key can be inserted and locked to allow the cover to be lifted and moved. Usually a metal cup shaped cover is welded or otherwise fixed to the underside of the cover to define a containment area immediately below the lifting eyes. The cover does not impede insertion of the lifting key into the lifting eye, but does prevent anything from passing through the hole from one side of the cover to the other. This includes, for example, gases beneath the cover and contaminants from outside the cover. The cover may be previously galvanised or painted according to requirements. The requirement to weld the lifting eye covers, pockets or bars to the cover itself reduces the production rate of the covers, as does the final stage of galvanisation or painting. In addition, where the cover is galvanised after pressing it can be prone to distortion. It is an object of the present invention to provide a lifting eye cover for use with access and ducting covers which do not require to be welded to the cover and which obviate the need to galvanise the cover after fabrication thereof has been completed. According to the present invention there is provided a seal for a lifting eye of a duct or access cover comprising a hollow neck portion adapted in use to be received within a lifting eye, securing means for securing the neck portion within the lifting eye and a cup shaped portion connected to the hollow neck portion which defines a comparment beneath the duct or access cover which is only accessible through the hollow neck portion. Preferably, the means for retaining the neck portion within the eye hole comprises a resiliently deformable lip around the top edge of the neck portion, which lip portion is of greater outer dimensions than the eye hole, but is resiliently deformable to pass therethrough in one direction and maintain the seal in position. Preferably, the seal is comprised of a plastics material. An embodiment of the present invention will now be described, by way of example, with reference to the accompanying drawing, which shows a section through a seal embodying the present invention mounted in an access cover. Referring to the accompanying drawing there is shown an access cover 1 which has been pressed from a sheet of mild steel, and in the centre of which has been punched a hole defined by sides 2. Within the hole is received the neck portion 3 of a seal 4 embodying the present invention. The outer perimeter of the neck portion 3 is of substantially the same shape as the hole in the cover 1, but is slightly smaller to allow it to be received therein. An elongate hole 5 is provided through the neck portion 3 through which the end of locking key can be inserted. A resiliently deformable lip portion 6 is provided around the tope edge of the neck portion 3 which is of slightly greater outer dimensions than the hole in the cover 1. The upper surface of the lip portion 6 is inclined to allow it to gradually deform as it is pushed into and through the hole in the cover 1.However, once through the hole in the cover 1 the lip portion 6 resumes its normal shape and dimensions. In this respect, the lower surface of the lip portion 6 is flat and being of greater dimensions than the hole in the cover 1 the flat lower surface of the lip portion 6 abuts against the top surface of the cover 1 ensuring that the neck portion 3 is securely held therein. The seal 4 further comprises a cup shaped portion 7 which is secured to an extension 8 of the neck portion 3 by means of complimentary snap-fitting projections 8. The cup shaped portion 7 defines a compartment 10 which opens into the hole 5 in the neck portion 3 and is large enough to allow the end of a locking key inserted therein through the hole 5 in the neck portion 3 to be rotated and locked therein beneath the neck portion 3. A plug 11 which fits the hole 5 in the neck portion 3 protects the lip portion 6 from damage and ensures that nothing is dropped into the compartment when the cover embodying the present invention is not in use. The use of the seal according to the present invention obviates the need to weld a cup to the bottom surface of a ducting or access cover. This means that the cover can be made of pre-coated steel i.e. galvanised sheets. Moreover as there is no need to galvanise the cover after fabrication there is less likelihood of the cover distorting and production rates can be much increased. Finally, it will be appreciated that whilst the seal embodying the present invention has a three part construction consisting of a neck portion, cup shaped portion and plug, the plug may be dispersed with, and the neck portion and cup shaped portion may be formed as a single piece i.e. from a plastics material using blow moulding techniques. CLAIMS
1. A seal for a lifting eye of a duct or access cover comprising a hollow neck portion adapted in use to be received within a lifting eye, securing means for securing the neck portion within the lifting eye and a cup shaped portion connected to the hollow neck portion which defines a compartment beneath the duct or access cover which is only acces sible through the hollow neck portion.
2. A seal as claimed in claim 1 wherein the means for retaining the neck portion within the eye hole comprises a resiliently deformable lip around the top edge of the neck portion, which lip portion is of greater outer dimensions than the eye hole, but is resiliently deformable to pass therethrough in one direc tion and maintain the seal in position.
3. A seal as claimed in claim 1 or claim 2 wherein the seal is comprised of a plastics material.
4. A seal substantially as hereinbefore described with reference to the accompanying drawing.
GB08602858A 1985-02-07 1986-02-05 Seal for the lifting eye of an access cover unit Expired GB2170846B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB858503077A GB8503077D0 (en) 1985-02-07 1985-02-07 Cover unit

Publications (3)

Publication Number Publication Date
GB8602858D0 GB8602858D0 (en) 1986-03-12
GB2170846A true GB2170846A (en) 1986-08-13
GB2170846B GB2170846B (en) 1987-10-07

Family

ID=10574070

Family Applications (2)

Application Number Title Priority Date Filing Date
GB858503077A Pending GB8503077D0 (en) 1985-02-07 1985-02-07 Cover unit
GB08602858A Expired GB2170846B (en) 1985-02-07 1986-02-05 Seal for the lifting eye of an access cover unit

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB858503077A Pending GB8503077D0 (en) 1985-02-07 1985-02-07 Cover unit

Country Status (1)

Country Link
GB (2) GB8503077D0 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2257735B (en) * 1991-07-09 1995-01-11 Glynwed Consumer & Building Improvements relating to access covers
GB2308858A (en) * 1995-12-30 1997-07-09 Richard James Vince Fillingham Manhole cover keyway plug
GB2331539A (en) * 1997-11-20 1999-05-26 John Brown Keyhole plug
GB2374373A (en) * 2001-04-12 2002-10-16 Wrekin Welding & Fabrication E Cover for ground surface access assembly
GB2381286A (en) * 2001-10-26 2003-04-30 Marie Graham Plug for inserting in holes or recesses in manhole covers, access hatches etc.
US11401681B2 (en) * 2018-04-27 2022-08-02 Bingham & Taylor Corp. Snap on meter pit extension

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2257735B (en) * 1991-07-09 1995-01-11 Glynwed Consumer & Building Improvements relating to access covers
GB2308858A (en) * 1995-12-30 1997-07-09 Richard James Vince Fillingham Manhole cover keyway plug
GB2331539A (en) * 1997-11-20 1999-05-26 John Brown Keyhole plug
GB2331539B (en) * 1997-11-20 2002-03-06 John Brown Access covers
GB2374373A (en) * 2001-04-12 2002-10-16 Wrekin Welding & Fabrication E Cover for ground surface access assembly
GB2374373B (en) * 2001-04-12 2005-02-09 Wrekin Welding & Fabrication E Ground surface access assemblies
GB2381286A (en) * 2001-10-26 2003-04-30 Marie Graham Plug for inserting in holes or recesses in manhole covers, access hatches etc.
US11401681B2 (en) * 2018-04-27 2022-08-02 Bingham & Taylor Corp. Snap on meter pit extension

Also Published As

Publication number Publication date
GB2170846B (en) 1987-10-07
GB8602858D0 (en) 1986-03-12
GB8503077D0 (en) 1985-03-13

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19980205