CA1050450A - Modular conduit system - Google Patents
Modular conduit systemInfo
- Publication number
- CA1050450A CA1050450A CA269,490A CA269490A CA1050450A CA 1050450 A CA1050450 A CA 1050450A CA 269490 A CA269490 A CA 269490A CA 1050450 A CA1050450 A CA 1050450A
- Authority
- CA
- Canada
- Prior art keywords
- conduits
- conduit
- unit
- connecting means
- securing
- 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.)
- Expired
Links
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
- F16L3/00—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets
- F16L3/22—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets specially adapted for supporting a number of parallel pipes at intervals
- F16L3/223—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets specially adapted for supporting a number of parallel pipes at intervals each support having one transverse base for supporting the pipes
- F16L3/2235—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets specially adapted for supporting a number of parallel pipes at intervals each support having one transverse base for supporting the pipes each pipe being supported by a common element fastened to the base
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Supports For Pipes And Cables (AREA)
- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
MODULAR CONDUIT SYSTEM
ABSTRACT OF DISCLOSURE
The plurality of conduits in side by side relation-ship with their longitudinal axes parallel are secured in this position by means of connectors, the ends of the conduits at one end of the assembly are positioned in a plane substan-tially perpendicular to the axes of the conduits and the opposite ends of the conduits are positioned a second plane substantially parallel to the first plane. Bell couplings are integrally formed at said one end of each of said con-duits. The connectors include a first connector spaced of said ends and secured to all said conduits to hold said con-duits with their opposite ends in said planes and at least a pair of further connectors said further connecting means being positioned between 6 & 24" from said one and said other ends respectively.
ABSTRACT OF DISCLOSURE
The plurality of conduits in side by side relation-ship with their longitudinal axes parallel are secured in this position by means of connectors, the ends of the conduits at one end of the assembly are positioned in a plane substan-tially perpendicular to the axes of the conduits and the opposite ends of the conduits are positioned a second plane substantially parallel to the first plane. Bell couplings are integrally formed at said one end of each of said con-duits. The connectors include a first connector spaced of said ends and secured to all said conduits to hold said con-duits with their opposite ends in said planes and at least a pair of further connectors said further connecting means being positioned between 6 & 24" from said one and said other ends respectively.
Description
FIELD OF THE INVENTION
The present invention relates to a modular conduit system more particularly the prase~t invention relates to a plurality of conduits or ducts interconnec~ed in a specific S relationship with each of fiaid ducts means being provided at one end thereof with an integral coupling means.
DESCRIPTION OF PRIOR ART
~he concept of modular conduit syst~m is not new, attempts have been made to provide a commercially acceptable multiple conduct syRtem for many year~ but prior to the present invention, none have been satiæfactory. Some of the earlier attempts were ~imilar to the present inYentiOn but all failed for one reason or another.
One of the earlier attempts i8 shown in Canadian Patent 394,953 issued Oct. 21/30 to Parker. This patent the individual ducts are secured together by means of circular rings through which the conduits pass. The spacing of the conduits is adjusted by the thickness of the encirculing ringq or by auxiliary ~pacer numbers. These encirculing rings are secured firmly to the ducts. The system of this patent ha~ never been commercially accepted, it i8 believed due to the spacing and arrangement of the joining collars and the mode of coupling.
A similar technlque for securing the conduits to-ge~her i8 shown in Canadian Patent 293,972 issued Oct. 15~29 to Burke et al, how~ver, in this arrangement star-~haped con-necting numbers are interposed between the conduits and each conduit i8 ~ecured over by a 90 radius to one section of the star. Another mode o~ securing the conduits together is shown in Canadian Pat~nt 293,g73 issued Oct. 15/29 ~o Burke, in this technique plate~ are provided with holes through which the conduits are pas~ed. The conduits are secured to these plates.
. ~ . - . . .
1050~50 None of the above technique~ have g~ined any commercial acceptance, despite the desire and many recent attempts to utilize multiple conduit unit~ in a modular ~ystem. Prior to the pre~ent invention the only commercial ~ystem required individual conduits to be ~ecured together in the field.
SUMMARY OF T~E INVENTION
It i~ the ob3ect of the present inVention to pro-vide a multiple conduit system, pre-assembled in the factory for burial a~ a unit.
Broadly the present in~ention relates to a modular conduit unit comprising a plurality of eonduits arranged in side by ~ide po~i~ion with their longi~udinal axe~ sub-stantially parallel, mean~ for ~ecuring ~aid conduit~ in ~aid po~ition with the end~ of said conduits at one end of said unit positioned in a plane substantially perpendicular to ~aid longitudinal axes and the opposite ends of said conduits being positioned in a second plane substantially perpendi-cular to said longitudinal axe~, a bell coupling ormed at said oppo~ite ends of each of said conduits, said bell coupl-ing having a tapering inner f~ce adapted to receive one of said one ends of a conduit of anoth~r conduit unit, said means :~
~or securing ~aid conduit~ in s~id position including a ~:
ecuring member spaced from ~aid ends and secured to all of said conduit~ and at lQast ~ pair of connecting means one of said oonn~cting means b~ing po~itioned between 6 & 24 inch from said one plane and another being within 6 & 24 inches of the said second plan~.
BRIEF ~ESCRIPTION OF D~AWINGS
Further f~tur~, obj~ct~ and advantages will be evident from the following detailed description of the pre-ferred embodim~nt~ of th~ pr~sent invention taken in conjunc-tion with the accompanying drawi~gs in which - . . . .. . . . -Figure 1 ~ ometric view of a multiple c:>nduit unit o the pre3ent ~nv~ntion Figure 2 - ~ a longitudinal ~ection through a pair of conduits Figure 3A - i8 ~ sec~ion along the lille 3- 3 of figure 2 and figure 3B in a ~imilar ~ectiorl wing the con-nector of figure 4.
~igure 4 - i8 aII i~ometrics view of an alternative connoctor Figure S - is ~ cro~-section of a typical conduit used in t:ihe pre3ent inYention.
DE~AILED DxSCRIPTION OF THE P~EFERRED ~MBOD~MISNTS
Sho~n in figure 1 the conduct unit of pre~ent in- .
vention comprise~ a plur~-l$ty o~ oonduits lO, 12, 14 & 16 . .
secured together by ~uitable conne¢ti~lg means ~uch as collars 18, 20 & 22. ~ach of th~ collar~ in the illustrated arra~ge- ~ ::
~nt i8 co~qpo~ed of four ring~ 2~, 26, 28 & 30 secured toge-ther in the area~ 32, 34, 36 ~ 38 t~e~ figur~ 3). q!he rings 24, 26, 28 & 30 co~pletly ~rlcircle co~du~ts lO, 12, 14 & 16 r~sp~ct~ v~ly .
The oonn~ctor~ or ooll~r~ may be replaced for ~-example by ~tar-~hap~d ~umb~rs e~-entially si~ilar to the rings exo~pt th~ area of ths rings on the outside of the con-duit~ 10~ 12, 14 6 16 would bQ eli~ln~ted. A nuitable star ~h~p~d conneotor 19 i~ illu~trated in figure 4 and in portion in Flgure 3A. The ~urfacR~ o~ thQ condu~t~ ~re ~ecured into th- cxadl~ 21 b~t~een the ~D 23 by ~ ~uitable m~n~ ~uch ~ ~ -a- adh~sive Pre~rdbly th- amoun~ of ~terial used to form th~g~ oonn~Gtors 19 w~ll ba reduced for m~nimuM wastage~
~or ~xampla, by ~ll~n~tislg ~X~8 n~terial a~ indicated at 25.
Th~ collar~ or contlQ¢tor~ 18, 20 & 22 r~u~t be pro-perly spac~d ~long th~ a;oes of th~ r~spective conduit~ lO, 12, k ~ 050450 14 & 16. Particularly the collars or connectors 18 & 22 must be spaced from the free ends of the conduits 10, 12, 14 & 16 by ~pecific distances indicated by the dimen~ions x & Y.
The intermediate connectors or securing members 20 may be 5 suitably spaced along the axes of the conduits as required to impart the desired strength characteristics to the unit.
The~e strength characteristics will vary depending on the length and diameter of the conduits of the unit.
It will be noted that the conduit~ 10, 12, 14 & 16 10 are arranged 80 that their one ends, as indicated at 50 are within a plane 52 substantially perpendicular to longtitudi-nal axes of the conduits while the opposite ends 54 are posi-tioned in a plane 56 parallel to the plane 52.
At least one of the securing member~ or interme-lS diate connectors 20 is secured to all of the conduits 10, 12, 14 & 16 80 that their ends 50 & 52 are held in theirrespective planes 52 & 56.
Connectors 18 ~ 22 positioned adjacent the end~
50 & 54 respectively must be positioned from the respective 20 planes 52 & 56 by a distance equal to X or Y respectively.
These distnnces X and Y are preferably equal and must be within the range of 6 to about 24 inches for operability.
Preferably these end connectors 18 & 22 will only be ; ~ temporarily ~ecured to the conduits 10, 12, 14 & 16 80 25 that they may be moved if req~ired to obtain further adjust-,. . ..
meAts or ~rearrangement laterally to facilitate coupling the -nd- of the conduits in adjacent conduit unit~ i.e. the collars 18 or 22 may dmply be slidable-relat~ve to the condults although it~ is preferred to at least tack them in , ~ ~ . . .
3~0~ itlon initially by means of an easily frangibie adhesive connection.
It i8 extre~ly important tha.t each of the conduits ', ~i :
~ . .
~050450 be provided with a b coupler as indicated at 56, 58, 60 &
62 for each of the conduit~ 10, 12, 14 & 16 respectively.
This coupler is ~hown in more detail in figure 5. The bell end~ are flared out at an angle L in range of about 0.5 to 8 and end edges of these couplers are tapered inwardly as indicated at 66. Similar tapers but in opposite direc-tion are provided of the male end of the pipe or condui~
as indicated 68 in figure 5. The tapers 68 & 66 facilitate insertion of the male end of the pipes into to their re-ppective bell couplers on conducts in an adjacent conduits unit and normally at an angle of 15 to 50 to the longitu-dinal axes of the aonduct.
While the invention has been de~cribed with respect to a 2 x 2 arrangement of conduits, it will be apparent that the invention i8 also applicable other arrangements including arrangements of 3 where one would ~imply eliminate one of the conduits in figure 1 arrangement. Other examples include arrangements of 8iX formed by two rows of three or arrange-ments of nine foxmed by three rows of three. If more than nine conduit~ are to be formed into a unit, problems may be encountered at the erection site unless the conduitsare short since the conduit package would then be too heavy to be handled properly.
It is proferred to have the connecters 18, 20 and 22 radially space the conduits 80 that the outer periphèry of the couplers 58, 60 & 62 just contact each other. However, when the unit is to be buried in concrete rather than sand, it may be desirab}e to space the conducts further apart ~o that the concrete aggregste may pass between the conduits and ~ill the ~pa¢s- there between.
In a partlcular arrangement of the present in-vention using four 20 ft long 3~ diameter conduits, were .
secured together in the manner illustrated in figure 1 with the distance~ X & Y each equal to the 11" and a third connec-tor 20 at the mid point of the conduits. The third aon nector was firmly anchored to all four of the conduits while the end connectors 18 & 22 were frangibly connected to one of the conduits only. Bell couplings of a~jacent conduits were in touching relationship and had a maximum in-side diameter (D. ~ax. figure S) of 3.8 and a minimum in-side diameter (D. Min. figure 5) of 3.75 with the bell being approximately 3.5~ long, the tapered ends 64 & 68 were at an angle of approximately 30.
Modification may be made without departing fromthe spirit of the invention as defined in the appended claims.
The present invention relates to a modular conduit system more particularly the prase~t invention relates to a plurality of conduits or ducts interconnec~ed in a specific S relationship with each of fiaid ducts means being provided at one end thereof with an integral coupling means.
DESCRIPTION OF PRIOR ART
~he concept of modular conduit syst~m is not new, attempts have been made to provide a commercially acceptable multiple conduct syRtem for many year~ but prior to the present invention, none have been satiæfactory. Some of the earlier attempts were ~imilar to the present inYentiOn but all failed for one reason or another.
One of the earlier attempts i8 shown in Canadian Patent 394,953 issued Oct. 21/30 to Parker. This patent the individual ducts are secured together by means of circular rings through which the conduits pass. The spacing of the conduits is adjusted by the thickness of the encirculing ringq or by auxiliary ~pacer numbers. These encirculing rings are secured firmly to the ducts. The system of this patent ha~ never been commercially accepted, it i8 believed due to the spacing and arrangement of the joining collars and the mode of coupling.
A similar technlque for securing the conduits to-ge~her i8 shown in Canadian Patent 293,972 issued Oct. 15~29 to Burke et al, how~ver, in this arrangement star-~haped con-necting numbers are interposed between the conduits and each conduit i8 ~ecured over by a 90 radius to one section of the star. Another mode o~ securing the conduits together is shown in Canadian Pat~nt 293,g73 issued Oct. 15/29 ~o Burke, in this technique plate~ are provided with holes through which the conduits are pas~ed. The conduits are secured to these plates.
. ~ . - . . .
1050~50 None of the above technique~ have g~ined any commercial acceptance, despite the desire and many recent attempts to utilize multiple conduit unit~ in a modular ~ystem. Prior to the pre~ent invention the only commercial ~ystem required individual conduits to be ~ecured together in the field.
SUMMARY OF T~E INVENTION
It i~ the ob3ect of the present inVention to pro-vide a multiple conduit system, pre-assembled in the factory for burial a~ a unit.
Broadly the present in~ention relates to a modular conduit unit comprising a plurality of eonduits arranged in side by ~ide po~i~ion with their longi~udinal axe~ sub-stantially parallel, mean~ for ~ecuring ~aid conduit~ in ~aid po~ition with the end~ of said conduits at one end of said unit positioned in a plane substantially perpendicular to ~aid longitudinal axes and the opposite ends of said conduits being positioned in a second plane substantially perpendi-cular to said longitudinal axe~, a bell coupling ormed at said oppo~ite ends of each of said conduits, said bell coupl-ing having a tapering inner f~ce adapted to receive one of said one ends of a conduit of anoth~r conduit unit, said means :~
~or securing ~aid conduit~ in s~id position including a ~:
ecuring member spaced from ~aid ends and secured to all of said conduit~ and at lQast ~ pair of connecting means one of said oonn~cting means b~ing po~itioned between 6 & 24 inch from said one plane and another being within 6 & 24 inches of the said second plan~.
BRIEF ~ESCRIPTION OF D~AWINGS
Further f~tur~, obj~ct~ and advantages will be evident from the following detailed description of the pre-ferred embodim~nt~ of th~ pr~sent invention taken in conjunc-tion with the accompanying drawi~gs in which - . . . .. . . . -Figure 1 ~ ometric view of a multiple c:>nduit unit o the pre3ent ~nv~ntion Figure 2 - ~ a longitudinal ~ection through a pair of conduits Figure 3A - i8 ~ sec~ion along the lille 3- 3 of figure 2 and figure 3B in a ~imilar ~ectiorl wing the con-nector of figure 4.
~igure 4 - i8 aII i~ometrics view of an alternative connoctor Figure S - is ~ cro~-section of a typical conduit used in t:ihe pre3ent inYention.
DE~AILED DxSCRIPTION OF THE P~EFERRED ~MBOD~MISNTS
Sho~n in figure 1 the conduct unit of pre~ent in- .
vention comprise~ a plur~-l$ty o~ oonduits lO, 12, 14 & 16 . .
secured together by ~uitable conne¢ti~lg means ~uch as collars 18, 20 & 22. ~ach of th~ collar~ in the illustrated arra~ge- ~ ::
~nt i8 co~qpo~ed of four ring~ 2~, 26, 28 & 30 secured toge-ther in the area~ 32, 34, 36 ~ 38 t~e~ figur~ 3). q!he rings 24, 26, 28 & 30 co~pletly ~rlcircle co~du~ts lO, 12, 14 & 16 r~sp~ct~ v~ly .
The oonn~ctor~ or ooll~r~ may be replaced for ~-example by ~tar-~hap~d ~umb~rs e~-entially si~ilar to the rings exo~pt th~ area of ths rings on the outside of the con-duit~ 10~ 12, 14 6 16 would bQ eli~ln~ted. A nuitable star ~h~p~d conneotor 19 i~ illu~trated in figure 4 and in portion in Flgure 3A. The ~urfacR~ o~ thQ condu~t~ ~re ~ecured into th- cxadl~ 21 b~t~een the ~D 23 by ~ ~uitable m~n~ ~uch ~ ~ -a- adh~sive Pre~rdbly th- amoun~ of ~terial used to form th~g~ oonn~Gtors 19 w~ll ba reduced for m~nimuM wastage~
~or ~xampla, by ~ll~n~tislg ~X~8 n~terial a~ indicated at 25.
Th~ collar~ or contlQ¢tor~ 18, 20 & 22 r~u~t be pro-perly spac~d ~long th~ a;oes of th~ r~spective conduit~ lO, 12, k ~ 050450 14 & 16. Particularly the collars or connectors 18 & 22 must be spaced from the free ends of the conduits 10, 12, 14 & 16 by ~pecific distances indicated by the dimen~ions x & Y.
The intermediate connectors or securing members 20 may be 5 suitably spaced along the axes of the conduits as required to impart the desired strength characteristics to the unit.
The~e strength characteristics will vary depending on the length and diameter of the conduits of the unit.
It will be noted that the conduit~ 10, 12, 14 & 16 10 are arranged 80 that their one ends, as indicated at 50 are within a plane 52 substantially perpendicular to longtitudi-nal axes of the conduits while the opposite ends 54 are posi-tioned in a plane 56 parallel to the plane 52.
At least one of the securing member~ or interme-lS diate connectors 20 is secured to all of the conduits 10, 12, 14 & 16 80 that their ends 50 & 52 are held in theirrespective planes 52 & 56.
Connectors 18 ~ 22 positioned adjacent the end~
50 & 54 respectively must be positioned from the respective 20 planes 52 & 56 by a distance equal to X or Y respectively.
These distnnces X and Y are preferably equal and must be within the range of 6 to about 24 inches for operability.
Preferably these end connectors 18 & 22 will only be ; ~ temporarily ~ecured to the conduits 10, 12, 14 & 16 80 25 that they may be moved if req~ired to obtain further adjust-,. . ..
meAts or ~rearrangement laterally to facilitate coupling the -nd- of the conduits in adjacent conduit unit~ i.e. the collars 18 or 22 may dmply be slidable-relat~ve to the condults although it~ is preferred to at least tack them in , ~ ~ . . .
3~0~ itlon initially by means of an easily frangibie adhesive connection.
It i8 extre~ly important tha.t each of the conduits ', ~i :
~ . .
~050450 be provided with a b coupler as indicated at 56, 58, 60 &
62 for each of the conduit~ 10, 12, 14 & 16 respectively.
This coupler is ~hown in more detail in figure 5. The bell end~ are flared out at an angle L in range of about 0.5 to 8 and end edges of these couplers are tapered inwardly as indicated at 66. Similar tapers but in opposite direc-tion are provided of the male end of the pipe or condui~
as indicated 68 in figure 5. The tapers 68 & 66 facilitate insertion of the male end of the pipes into to their re-ppective bell couplers on conducts in an adjacent conduits unit and normally at an angle of 15 to 50 to the longitu-dinal axes of the aonduct.
While the invention has been de~cribed with respect to a 2 x 2 arrangement of conduits, it will be apparent that the invention i8 also applicable other arrangements including arrangements of 3 where one would ~imply eliminate one of the conduits in figure 1 arrangement. Other examples include arrangements of 8iX formed by two rows of three or arrange-ments of nine foxmed by three rows of three. If more than nine conduit~ are to be formed into a unit, problems may be encountered at the erection site unless the conduitsare short since the conduit package would then be too heavy to be handled properly.
It is proferred to have the connecters 18, 20 and 22 radially space the conduits 80 that the outer periphèry of the couplers 58, 60 & 62 just contact each other. However, when the unit is to be buried in concrete rather than sand, it may be desirab}e to space the conducts further apart ~o that the concrete aggregste may pass between the conduits and ~ill the ~pa¢s- there between.
In a partlcular arrangement of the present in-vention using four 20 ft long 3~ diameter conduits, were .
secured together in the manner illustrated in figure 1 with the distance~ X & Y each equal to the 11" and a third connec-tor 20 at the mid point of the conduits. The third aon nector was firmly anchored to all four of the conduits while the end connectors 18 & 22 were frangibly connected to one of the conduits only. Bell couplings of a~jacent conduits were in touching relationship and had a maximum in-side diameter (D. ~ax. figure S) of 3.8 and a minimum in-side diameter (D. Min. figure 5) of 3.75 with the bell being approximately 3.5~ long, the tapered ends 64 & 68 were at an angle of approximately 30.
Modification may be made without departing fromthe spirit of the invention as defined in the appended claims.
Claims (4)
1. A modular conduit unti comprising a plurality of conduits arranged in spaced side by side position with their longitudinal axis substantially parallel, means for securing said conduits in said position with the ends of said conduits at one end of said unit positioned in a plane substantially perpendicular to said longitudinal axis and the opposite end of said conduit positioned in a second plane substantially perpendicular to said longitudinal axis, an integral bell coupling formed at said opposite end of each of said conduits, each said bell coupling having a tapered inner face adapted to receive said one end of a conduit of another conduit unit, means for securing said conduit in said position including a pair of connecting means, one of said connecting means being positioned between 6 and 24 inches from said one plane and the other of said connecting means being spaced between 6 and 24 inches of the other of said planes, said connecting means interconnecting said conduits and at least one securing member positioned intermediate said pair of connecting means, means securing said securing member to all of said conduits in said unit thereby to fix said conduits together and said ends in said planes.
2. A conduit unit as defined in claim 1 wherein each of said connecting means are secured to said conduits by an adhesive connection.
3. A conduit unit as defined in claim 1 wherein said at least one securing member and each of said connecting members are in the form of collars adapted to surround each of said conduits in said unit.
4. A conduit unit as defined in claim 1 or 2 wherein said securing member and each of said connecting members comprise a star-shaped element having surfaces matching with the outer periphery of said conduits.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA269,490A CA1050450A (en) | 1977-01-14 | 1977-01-14 | Modular conduit system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA269,490A CA1050450A (en) | 1977-01-14 | 1977-01-14 | Modular conduit system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1050450A true CA1050450A (en) | 1979-03-13 |
Family
ID=4107708
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA269,490A Expired CA1050450A (en) | 1977-01-14 | 1977-01-14 | Modular conduit system |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1050450A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2555964A1 (en) * | 1983-12-02 | 1985-06-07 | Everitube | METHOD FOR TUBULAR OBJECT CODING AND DEVICE FOR IMPLEMENTING THE SAME |
| US5236227A (en) * | 1991-11-12 | 1993-08-17 | Robert Adams | Assembly for connecting multi-duct conduits having tapered alignment walls |
| GB2511821A (en) * | 2013-03-14 | 2014-09-17 | Aqua Fabrications Ltd | Construction of drainage systems |
-
1977
- 1977-01-14 CA CA269,490A patent/CA1050450A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2555964A1 (en) * | 1983-12-02 | 1985-06-07 | Everitube | METHOD FOR TUBULAR OBJECT CODING AND DEVICE FOR IMPLEMENTING THE SAME |
| US5236227A (en) * | 1991-11-12 | 1993-08-17 | Robert Adams | Assembly for connecting multi-duct conduits having tapered alignment walls |
| GB2511821A (en) * | 2013-03-14 | 2014-09-17 | Aqua Fabrications Ltd | Construction of drainage systems |
| GB2511821B (en) * | 2013-03-14 | 2017-01-18 | Aqua Fabrications Ltd | Construction of drainage systems |
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