GB2181206A - Juxtaposed duct elements - Google Patents

Juxtaposed duct elements Download PDF

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Publication number
GB2181206A
GB2181206A GB08524119A GB8524119A GB2181206A GB 2181206 A GB2181206 A GB 2181206A GB 08524119 A GB08524119 A GB 08524119A GB 8524119 A GB8524119 A GB 8524119A GB 2181206 A GB2181206 A GB 2181206A
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GB
United Kingdom
Prior art keywords
duct
locking means
juxtaposed
ducting
ofthe
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
GB08524119A
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GB2181206B (en
GB8524119D0 (en
Inventor
Colin John Reid
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.)
Camas UK Ltd
Original Assignee
ECC Quarries 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 ECC Quarries Ltd filed Critical ECC Quarries Ltd
Priority to GB8524119A priority Critical patent/GB2181206B/en
Publication of GB8524119D0 publication Critical patent/GB8524119D0/en
Publication of GB2181206A publication Critical patent/GB2181206A/en
Application granted granted Critical
Publication of GB2181206B publication Critical patent/GB2181206B/en
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L9/00—Rigid pipes
    • F16L9/003—Rigid pipes with a rectangular cross-section

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)

Abstract

A channel shaped duct element 10 has side walls 18, 20 having end faces (14, 16) of saw tooth profile form, a tongue 22 projecting from the base at one end thereof, and has a cut-out or groove 24, complementary to the tongue 22, in the base at the other end thereof. A service duct is formed by laying a plurality of such elements in juxtaposed end-to-end relationship whereby adjacent elements 10, 12 have interlocking end faces 14, 16 which prevent relative longitudinal displacement of the elements, and a tongue 22 extending from the element 12 is received by a groove 24 in the element 10 which prevents relative lateral displacement. The duct can be closed by a plurality of capping members 26. <IMAGE>

Description

SPECIFICATION Juxtaposed elements The present invention relates to a cast or moulded elementforplacing in juxtaposed relationship with a similar element and is concerned particularly, though not exclusively, with ducting for carrying services such as cables, water and gas.
Services, such for example as electric power and telephone cables, are frequently laid inducting. The ducting is generally channel-shaped and laid horizontally in a trench excavated from the ground.
Traditionally, the ducting is cast from concrete but, more recently has been moulded from plastics mat erial. Lengths of ducting are laid end to end in abutting relationship, and covering slabs of concrete or plastics, as the case may be, placed over the ducting to protect the service cable or pipe installed therein.
The trench is then reinstated leaving the service duct ing protected below ground level.
In another known form of service ducting adjacent ducts are secured together by a steel staple which passes into respectiveaperturesthereforin adjacent ducts. Disadvantages to this type of ducting are that the ducts need to be more accurately cast to ensure consistent placing of the apertures, the ducts need to bemorecarefullyalignedtoenablethestaplesto be pinned in place and, furthermore, a supply of both ducts and staples must be made available on site.
In accordance with the broadest aspect of the present invention there is provided a cast or moulded element for placing in juxtaposed relationship with a similarly cast or moulded element or elements in which respective first locking means are provided integral with each element at opposite ends thereof to enable juxtaposed elements to be locked together against longitudinal displacement.
In a preferred embodimentofthe invention respective second locking means are also provided integrally on each element for locking juxtaposed elements against lateral displacement.
When the cast or moulded element is a channel shaped duct, the respective first locking means may conveniently be located in the ends ofthe sidewalls ofthe channel. In a preferred embodiment of the invention the first locking means at one end of the duct is of a generally saw-tooth form, the locking means at the other end of the duct being of a complementary form to enable it to mate with the first locking means of an adjacent duct.
The respective second locking means is conveniently provided in the base of the channel shaped duct. In the preferred embodimentthesecond locking means comprises a tongue protecting from one end ofthe duct base with a complementary shaped cut-out in the base at the other end ofthe duct to receive the tongue of an adjacent duct.
Whilst the invention is intended to be applicable primarily to ducting where each element consists of agenerallychannel shaped ductwith acoveringslab therefor, the invention may equally be applied to, for example, edge stones such as kerb stones.
The invention will now be described further by way of example with reference to the accompanying drawings the single figure of which is a diagrammatic perspective view of one complete cast concrete duct and part of another duct arranged in juxtaposed relationship with the complete duct.
Two generally channel shaped cast concrete ducts 10, 12 are arranged with respective ends 14, 16 in juxtaposed relationship so that the ducts are both longitudinally and laterally locked together. The profile ofthe sidewalls 18,20 ofthe duct 10 are of generally saw-tooth form and the corresponding side walls ofthe duct 12 are of complementary profile sothat the respective ends are intermeshed and so locked together.
Lateral locking of the ducts is achieved by atongue 22 in the duct base which engages in a corresponding cut-out 24 of an adjacent duct.
When the ducting is placed in a trench excavated fromtheground,the longitudinal and lateral locking ensuresthatthe run ofthe ducting is in correct alignment. Subsequent to installation of the service or services to be carried by the ducting a covering slab 26 is placed over the open face of each duct to prevent the ingress of foreign matter such as soil.
The side walls 18,20 ofeach duct may be slightly tapered to facilitate removal from the mould in which the duct is cast.
If desired the ducting may be reinforced, for example by a steel mesh reinformcementwhich is held in spaced relationshiptothewallsofthe mould by spacers. Concrete is then poured into the mould and allowed to set.
In an alternative embodiment ofthe invention, not shown, part ofthe saw-tooth configuration ofthe re spectivefirst locking means is removed to enable the saw-tooth configuration to perform both longitudinal and lateral locking.
1. Acastormouldedelementforplacing injuxtaposed relationshipwithasimilarlycastormoulded element or elements in which respective first locking means are provided integral with each element at op positeendsthereofto enable juxtaposed elements to be locked together against longitudinal displacement.
2. An element as claimed in claim 1 in which second locking means are provided integrally on each element for locking juxtaposed elements against lateral displacement.
3. An element as claimed in claim 1 in which when the cast or moulded element is a channel shaped duct, the respective first locking means are located in the ends of the side walls of the channel.
4. An element as claimed in claim 3 in which the first locking means at one end ofthe duct is of a generally saw-tooth form, the locking means at the other end oftheductbeingofacomplementaryformto enable itto mate with the first locking means of an adjacent duct.
5. An element as claimed in any one of claims 1 to 4 in which the respective second locking means is provided in the base ofthechannel shaped duct.
6. An element as claimed in claim Sin which the second locking means comprises a tongue project
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (9)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Juxtaposed elements The present invention relates to a cast or moulded elementforplacing in juxtaposed relationship with a similar element and is concerned particularly, though not exclusively, with ducting for carrying services such as cables, water and gas. Services, such for example as electric power and telephone cables, are frequently laid inducting. The ducting is generally channel-shaped and laid horizontally in a trench excavated from the ground. Traditionally, the ducting is cast from concrete but, more recently has been moulded from plastics mat erial. Lengths of ducting are laid end to end in abutting relationship, and covering slabs of concrete or plastics, as the case may be, placed over the ducting to protect the service cable or pipe installed therein. The trench is then reinstated leaving the service duct ing protected below ground level. In another known form of service ducting adjacent ducts are secured together by a steel staple which passes into respectiveaperturesthereforin adjacent ducts. Disadvantages to this type of ducting are that the ducts need to be more accurately cast to ensure consistent placing of the apertures, the ducts need to bemorecarefullyalignedtoenablethestaplesto be pinned in place and, furthermore, a supply of both ducts and staples must be made available on site. In accordance with the broadest aspect of the present invention there is provided a cast or moulded element for placing in juxtaposed relationship with a similarly cast or moulded element or elements in which respective first locking means are provided integral with each element at opposite ends thereof to enable juxtaposed elements to be locked together against longitudinal displacement. In a preferred embodimentofthe invention respective second locking means are also provided integrally on each element for locking juxtaposed elements against lateral displacement. When the cast or moulded element is a channel shaped duct, the respective first locking means may conveniently be located in the ends ofthe sidewalls ofthe channel. In a preferred embodiment of the invention the first locking means at one end of the duct is of a generally saw-tooth form, the locking means at the other end of the duct being of a complementary form to enable it to mate with the first locking means of an adjacent duct. The respective second locking means is conveniently provided in the base of the channel shaped duct. In the preferred embodimentthesecond locking means comprises a tongue protecting from one end ofthe duct base with a complementary shaped cut-out in the base at the other end ofthe duct to receive the tongue of an adjacent duct. Whilst the invention is intended to be applicable primarily to ducting where each element consists of agenerallychannel shaped ductwith acoveringslab therefor, the invention may equally be applied to, for example, edge stones such as kerb stones. The invention will now be described further by way of example with reference to the accompanying drawings the single figure of which is a diagrammatic perspective view of one complete cast concrete duct and part of another duct arranged in juxtaposed relationship with the complete duct. Two generally channel shaped cast concrete ducts 10, 12 are arranged with respective ends 14, 16 in juxtaposed relationship so that the ducts are both longitudinally and laterally locked together. The profile ofthe sidewalls 18,20 ofthe duct 10 are of generally saw-tooth form and the corresponding side walls ofthe duct 12 are of complementary profile sothat the respective ends are intermeshed and so locked together. Lateral locking of the ducts is achieved by atongue 22 in the duct base which engages in a corresponding cut-out 24 of an adjacent duct. When the ducting is placed in a trench excavated fromtheground,the longitudinal and lateral locking ensuresthatthe run ofthe ducting is in correct alignment. Subsequent to installation of the service or services to be carried by the ducting a covering slab 26 is placed over the open face of each duct to prevent the ingress of foreign matter such as soil. The side walls 18,20 ofeach duct may be slightly tapered to facilitate removal from the mould in which the duct is cast. If desired the ducting may be reinforced, for example by a steel mesh reinformcementwhich is held in spaced relationshiptothewallsofthe mould by spacers. Concrete is then poured into the mould and allowed to set. In an alternative embodiment ofthe invention, not shown, part ofthe saw-tooth configuration ofthe re spectivefirst locking means is removed to enable the saw-tooth configuration to perform both longitudinal and lateral locking. CLAIMS 1. Acastormouldedelementforplacing injuxtaposed relationshipwithasimilarlycastormoulded element or elements in which respective first locking means are provided integral with each element at op positeendsthereofto enable juxtaposed elements to be locked together against longitudinal displacement. 2. An element as claimed in claim 1 in which second locking means are provided integrally on each element for locking juxtaposed elements against lateral displacement. 3. An element as claimed in claim 1 in which when the cast or moulded element is a channel shaped duct, the respective first locking means are located in the ends of the side walls of the channel. 4. An element as claimed in claim 3 in which the first locking means at one end ofthe duct is of a generally saw-tooth form, the locking means at the other end oftheductbeingofacomplementaryformto enable itto mate with the first locking means of an adjacent duct. 5. An element as claimed in any one of claims 1 to 4 in which the respective second locking means is provided in the base ofthechannel shaped duct. 6. An element as claimed in claim Sin which the second locking means comprises a tongue project ing from one end of the duct base with a complementary shaped cut-out in the base at the other end ofthe duct to receive the tongue of an adjacent duct. 7. An element as claimed in claim 1 or 2 in which a single locking means perfoms both longitudinal and lateral locking. New claims or amendments to claims filed on 1/10/86 Superseded claims 1-7 Neworamended claims
1. A cast or moulded element having two end portions for placing in interlocked relationship with another juxtaposed element so thatthe one end portion of the one element confronts an end portion of the juxtaposed element, each element has a first end portion and a second end portion, the first end portion of one element intended to engage the second end portion of the juxtaposed element, the first and second end portions having respectivefirstand second interlocking means, the first interlocking means being adapted to interlockwith the second interlocking means of a juxtaposed element to prevent relative longitudinal displacement thereof, one end portion being provided with atongueforinterengagement of a groove in a juxtaposed elementto prevent relative lateral displacement thereof.
2. An element as claimed in claim 1, having a tongue projecting from the first end portion and a complementary groove being provided in the second end portion thereof.
3. An element as claimed in claim 1 or claim 2, in which the first and second interlocking means are of generally sawtooth form.
4. An element as claimed in any one of the preceding claims, in which the element is a channel shaped duct, with side walls having end faces providing the interlocking means.
5. An element as claimed in claim 4, in which the tongue is located at the base of the channel.
6. An element as claimed in any one of claims 1 to 4, in which the tongue projects from the interlocking means.
7. An element as claimed in any one of the preceding claims, which is manufactured from concrete.
8. An element constructed and arranged sub stantially as herein particularly described, with referenceto and as illustrated in the accompanying drawing.
9. A joint incorporating a plurality of elements as claimed in claim 1, constructed, arranged and adapted to operate substantially as herein particularlydescribed with reference to and as illustrated in the ac companying drawings.
GB8524119A 1985-10-01 1985-10-01 Juxtaposed elements Expired GB2181206B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8524119A GB2181206B (en) 1985-10-01 1985-10-01 Juxtaposed elements

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8524119A GB2181206B (en) 1985-10-01 1985-10-01 Juxtaposed elements

Publications (3)

Publication Number Publication Date
GB8524119D0 GB8524119D0 (en) 1985-11-06
GB2181206A true GB2181206A (en) 1987-04-15
GB2181206B GB2181206B (en) 1989-12-20

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2257383A (en) * 1991-06-26 1993-01-13 Morganite Thermal Ceramics Ltd Duct for conveying molten metal
GB2296304A (en) * 1994-12-20 1996-06-26 Brierley B Pre-cast concrete box culvert
US5986212A (en) * 1997-10-09 1999-11-16 Lhota; Thomas E. Plastic channel for electrical wiring
EP2921599A1 (en) * 2014-03-17 2015-09-23 Die Spezialelemente AG Device for the connection of elements, element for the construction of a channel and method for laying elements

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB645764A (en) * 1948-03-31 1950-11-08 Tata Iron And Steel Company Lt Improved union for water or gas pipes
GB722987A (en) * 1952-12-29 1955-02-02 Orlit Ltd Improvements in or relating to gullies for bowling greens and like playing grounds
GB776871A (en) * 1954-06-15 1957-06-12 Ronald Henry Sayers Improved edging block for lawn and other borders
GB856494A (en) * 1959-09-29 1960-12-21 Aeroquip Corp Coupled joint
GB1238350A (en) * 1968-08-23 1971-07-07
GB1402447A (en) * 1971-07-28 1975-08-06 Jakobsen K Paving stones
GB1523520A (en) * 1975-12-31 1978-09-06 Technilec Sarl Electric ducts
US4346920A (en) * 1980-04-28 1982-08-31 Smith International, Inc. Threaded connection using variable lead threads
GB2113790A (en) * 1982-01-27 1983-08-10 Hunting Oilfield Services Improvements in and relating to pipe connectors

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB179975A (en) * 1921-01-11 1922-05-11 Henry Wilkins Improvements in and relating to concrete blocks and the like
GB1066701A (en) * 1965-01-01 1967-04-26 British Moulded Fibre Ltd Improved structural element for, e.g. building
GB1200100A (en) * 1967-04-26 1970-07-29 Armand Gravel A building block and structure formed therewith
BE786175A (en) * 1971-07-13 1973-01-12 Sif Entreprise Bachy IMPROVEMENTS IN THE REALIZATION OF WALLS IN THE SOIL USING PREFABRICATED ELEMENTS
GB1388117A (en) * 1971-09-21 1975-03-19 Weeks H H J Method and blocks for building
GB8319433D0 (en) * 1983-07-19 1983-08-17 Cecon Int Nv Building block

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB645764A (en) * 1948-03-31 1950-11-08 Tata Iron And Steel Company Lt Improved union for water or gas pipes
GB722987A (en) * 1952-12-29 1955-02-02 Orlit Ltd Improvements in or relating to gullies for bowling greens and like playing grounds
GB776871A (en) * 1954-06-15 1957-06-12 Ronald Henry Sayers Improved edging block for lawn and other borders
GB856494A (en) * 1959-09-29 1960-12-21 Aeroquip Corp Coupled joint
GB1238350A (en) * 1968-08-23 1971-07-07
GB1402447A (en) * 1971-07-28 1975-08-06 Jakobsen K Paving stones
GB1523520A (en) * 1975-12-31 1978-09-06 Technilec Sarl Electric ducts
US4346920A (en) * 1980-04-28 1982-08-31 Smith International, Inc. Threaded connection using variable lead threads
GB2113790A (en) * 1982-01-27 1983-08-10 Hunting Oilfield Services Improvements in and relating to pipe connectors

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2257383A (en) * 1991-06-26 1993-01-13 Morganite Thermal Ceramics Ltd Duct for conveying molten metal
GB2296304A (en) * 1994-12-20 1996-06-26 Brierley B Pre-cast concrete box culvert
GB2296304B (en) * 1994-12-20 1998-12-09 Brierley B Concrete pre-cast box culvert section and method of installing same
US5986212A (en) * 1997-10-09 1999-11-16 Lhota; Thomas E. Plastic channel for electrical wiring
EP2921599A1 (en) * 2014-03-17 2015-09-23 Die Spezialelemente AG Device for the connection of elements, element for the construction of a channel and method for laying elements
CH709433A1 (en) * 2014-03-17 2015-09-30 Die Spezialelemente Ag Device for connecting elements, element for the construction of a channel and process for laying elements.

Also Published As

Publication number Publication date
GB2181206B (en) 1989-12-20
GB8524119D0 (en) 1985-11-06

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Legal Events

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

Effective date: 19961001