GB2029916A - Branch saddles for plastics pipes - Google Patents

Branch saddles for plastics pipes Download PDF

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Publication number
GB2029916A
GB2029916A GB7836479A GB7836479A GB2029916A GB 2029916 A GB2029916 A GB 2029916A GB 7836479 A GB7836479 A GB 7836479A GB 7836479 A GB7836479 A GB 7836479A GB 2029916 A GB2029916 A GB 2029916A
Authority
GB
United Kingdom
Prior art keywords
pipe
saddle
branch
cuts
saddles
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
GB7836479A
Other versions
GB2029916B (en
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.)
Hepworth Plastics Ltd
Original Assignee
Hepworth Plastics 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 Hepworth Plastics Ltd filed Critical Hepworth Plastics Ltd
Priority to GB7836479A priority Critical patent/GB2029916B/en
Publication of GB2029916A publication Critical patent/GB2029916A/en
Application granted granted Critical
Publication of GB2029916B publication Critical patent/GB2029916B/en
Expired legal-status Critical Current

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
    • F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
    • F16L47/26—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics for branching pipes; for joining pipes to walls; Adaptors therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
    • B29C66/131—Single flanged joints, i.e. one of the parts to be joined being rigid and flanged in the joint area
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/22—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being in the form of recurring patterns
    • B29C66/221—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being in the form of recurring patterns being in the form of a sinusoidal wave
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/52—Joining tubular articles, bars or profiled elements
    • B29C66/522—Joining tubular articles
    • B29C66/5224—Joining tubular articles for forming fork-shaped connections, e.g. for making Y-shaped pieces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/52—Joining tubular articles, bars or profiled elements
    • B29C66/522—Joining tubular articles
    • B29C66/5229—Joining tubular articles involving the use of a socket
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/54—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
    • B29C66/547—Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles, e.g. endless tubes

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Branch Pipes, Bends, And The Like (AREA)

Abstract

A method of manufacturing branch saddles 11 from plastics pipe 12 comprises making along two opposite locations continuous undulating cuts 13, which are preferably sinusoidal, cutting each half of the thus cut pipe into saddle portions by cutting transversely at regular intervals 14, which are preferably at crests of the sinusoidal cuts, and raising a socket or spigot 15 from around a hole 16 in each saddle portion, thus avoiding or greatly reducing wastage of material as compared with the prior art method of cutting away at one side of a length of plastics pipe to form a saddle portion for snapping on and embracing more than half the periphery of a pipe 3 to be provided with a branch. <IMAGE>

Description

SPECIFICATION Branch saddles for plastic pipes This invention relates to branch saddles for plastics pipes, more particularly of the type formed from a length of similar plastics pipe cut away at one side to form a resilient member for snapping on and embracing more than half the periphery of a pipe to be provided with a branch, with a socket or spigot raised from a hole in the saddle for attachment of a branch pipe.
In use, a suitably shaped hole is cut in the pipe to be provided with a branch, a cement is applied around the hole, and the saddle snapped into position, when the resilience of the material of the saddle holds it firmly and closely to the pipe while the cement hardens and bonds the two components together, making a water-tight seal.
It will be appreciated that this method of manufacture is wasteful of material in that approximately one third of the pipe from which the saddles are manufactured is discarded, and so the object of the present invention is to manufacture branch saddles from plastics pipe while discarding the minimum amount of material possible.
According to the present invention, a method of manufacturing branch saddles from plastics pipe comprises making along two opposite locations continuous undulating cuts, cutting each half of the thus cut pipe transversely at regular intervals into saddle portions, and raising a socket or spigot from around a hole in each saddle portion.
The undulating cuts forms tongues on each side of each saddle portion, the free ends of which tongues reach to more than half the periphery of the pipe, and preferably to two-thirds of the periphery of the pipe.
The undulating cuts are preferably sinusoidal, and the transverse cuts preferably extend from or to the crests of the undulating cuts, that is to say the transverse cuts are midway between tongues of adjacent saddle portions from one half of the sinusoidally cut pipe, in which case a samll portion of each half is discarded, from one end and the other from the other end of a length of plastics pipe.
However, other forms of undulating cuts may be used, for example a square or "castellated" waveform, and the transverse cuts may be aligned so that no material at all need be discarded.
The undulating cuts may be made by means of a jigsaw with the pipe held in a jig, while the transverse may be made by a bandsaw.
A method in accordance with the invention will now be described, by way of example only, with reference to the accompanying drawings, in which Figures 1 to 3 relate to the prior art method and show an end view (Figure 1) and side view (Figure 2) of a branch saddle, and a part side view of the saddle fitted on a pipe to be provided with a branch pipe; Figure 4 is a part-sectional side view of a length of plastics pipe showing how it is cut in accordance with the invention to form saddle portions; and Figures 5 to 7 correspond to Figures 1 to 3 but relate to a branch saddle manufactured in accordance with the invention.
In the prior art method illustrated by Figures 1 to 3, a branch saddle 1 is formed from a length 2 of plastics pipe (e.g., similar to the plastics pipe 3 to be provided with a branch) cut away at one side 4 to form a resilient member for snapping on and embracing more than half the periphery of the pipe 3 to be provided with a branch, with a spigot 5 (or alternatively a socket) raised from a hole 6 in the saddle for attachment of a branch pipe (not shown).
In use (Figure 3) a suitably shaped hole 7 is cut in the pipe 3, a cement is applied around the hole, and the saddle 1 snapped into position, when the resilience of the material of the saddle holds it firmly and closely to the pipe 3 while the cement hardens and bonds the two components together, making a watertight seal. It will be appreciated that the cutting away of the side 4 of the length 2 of pipe to form the saddle is wasteful of material in that approximately one third is discarded.
In the method in accordance with the invention illustrated by Figures 4 to 7, branch saddles 11 are manufactured from plastics pipe 12 by making along two opposite locations continuous undulating cuts 13, cutting each half of the thus cut pipe transversely at regular intervals 14 into saddle portions, and raising a spigot 15 (or alternatively a socket) from a hole 16 in each saddle portion.The undulating cuts 13, which are sinusoidal, form tongues 17 on each side of each saddle portion 11, the free ends of which tongues reach to two-thirds of the periphery of the pipe 3 to be provided with a branch, and the transverse cuts 14 extend from or to crests of the undulating cuts 13 (i.e., the transverse cuts are midway between tongues 17 of adjacent saddle portions 11 from one half of the sinusoidally cut pipe), so that a small portion 18 of each half is discarded, one from one end and the other from the other end of the length 12 of plastics pipe.
A comparison can be made between the method of the invention described above and the prior art method previously described, assuming the overall length of the saddles to be the same in each case.
Sixteen saddles for 250 mm pipe produced by the prior art method require 5.3 metres of 250 mm pipe of which 33% is discarded, while by the method of the invention described with reference to Figures 4 to 7, sixteen saddles for 250 mm pipe are formed from only 2.8 metres of 250 mm pipe with only 4% discarded.
An additional benefit of the invention is that a saddle 11 with tongues 17 requires less effort to spring on to the pipe 3 than a saddle 1 of the known type.
The undulating cuts 13 may be made by means of a jigsaw with the pipe held in a jig (not shown), while the transverse cuts may be made by a bandsaw.
1. A method of manufacturing branch saddles from plastics pipe comprising making along two opposite locations continuous undulating cuts, cutting each half of the thus cut pipe transversely at regular intervals into saddle portions, and raising a
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (9)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Branch saddles for plastic pipes This invention relates to branch saddles for plastics pipes, more particularly of the type formed from a length of similar plastics pipe cut away at one side to form a resilient member for snapping on and embracing more than half the periphery of a pipe to be provided with a branch, with a socket or spigot raised from a hole in the saddle for attachment of a branch pipe. In use, a suitably shaped hole is cut in the pipe to be provided with a branch, a cement is applied around the hole, and the saddle snapped into position, when the resilience of the material of the saddle holds it firmly and closely to the pipe while the cement hardens and bonds the two components together, making a water-tight seal. It will be appreciated that this method of manufacture is wasteful of material in that approximately one third of the pipe from which the saddles are manufactured is discarded, and so the object of the present invention is to manufacture branch saddles from plastics pipe while discarding the minimum amount of material possible. According to the present invention, a method of manufacturing branch saddles from plastics pipe comprises making along two opposite locations continuous undulating cuts, cutting each half of the thus cut pipe transversely at regular intervals into saddle portions, and raising a socket or spigot from around a hole in each saddle portion. The undulating cuts forms tongues on each side of each saddle portion, the free ends of which tongues reach to more than half the periphery of the pipe, and preferably to two-thirds of the periphery of the pipe. The undulating cuts are preferably sinusoidal, and the transverse cuts preferably extend from or to the crests of the undulating cuts, that is to say the transverse cuts are midway between tongues of adjacent saddle portions from one half of the sinusoidally cut pipe, in which case a samll portion of each half is discarded, from one end and the other from the other end of a length of plastics pipe. However, other forms of undulating cuts may be used, for example a square or "castellated" waveform, and the transverse cuts may be aligned so that no material at all need be discarded. The undulating cuts may be made by means of a jigsaw with the pipe held in a jig, while the transverse may be made by a bandsaw. A method in accordance with the invention will now be described, by way of example only, with reference to the accompanying drawings, in which Figures 1 to 3 relate to the prior art method and show an end view (Figure 1) and side view (Figure 2) of a branch saddle, and a part side view of the saddle fitted on a pipe to be provided with a branch pipe; Figure 4 is a part-sectional side view of a length of plastics pipe showing how it is cut in accordance with the invention to form saddle portions; and Figures 5 to 7 correspond to Figures 1 to 3 but relate to a branch saddle manufactured in accordance with the invention. In the prior art method illustrated by Figures 1 to 3, a branch saddle 1 is formed from a length 2 of plastics pipe (e.g., similar to the plastics pipe 3 to be provided with a branch) cut away at one side 4 to form a resilient member for snapping on and embracing more than half the periphery of the pipe 3 to be provided with a branch, with a spigot 5 (or alternatively a socket) raised from a hole 6 in the saddle for attachment of a branch pipe (not shown). In use (Figure 3) a suitably shaped hole 7 is cut in the pipe 3, a cement is applied around the hole, and the saddle 1 snapped into position, when the resilience of the material of the saddle holds it firmly and closely to the pipe 3 while the cement hardens and bonds the two components together, making a watertight seal. It will be appreciated that the cutting away of the side 4 of the length 2 of pipe to form the saddle is wasteful of material in that approximately one third is discarded. In the method in accordance with the invention illustrated by Figures 4 to 7, branch saddles 11 are manufactured from plastics pipe 12 by making along two opposite locations continuous undulating cuts 13, cutting each half of the thus cut pipe transversely at regular intervals 14 into saddle portions, and raising a spigot 15 (or alternatively a socket) from a hole 16 in each saddle portion.The undulating cuts 13, which are sinusoidal, form tongues 17 on each side of each saddle portion 11, the free ends of which tongues reach to two-thirds of the periphery of the pipe 3 to be provided with a branch, and the transverse cuts 14 extend from or to crests of the undulating cuts 13 (i.e., the transverse cuts are midway between tongues 17 of adjacent saddle portions 11 from one half of the sinusoidally cut pipe), so that a small portion 18 of each half is discarded, one from one end and the other from the other end of the length 12 of plastics pipe. A comparison can be made between the method of the invention described above and the prior art method previously described, assuming the overall length of the saddles to be the same in each case. Sixteen saddles for 250 mm pipe produced by the prior art method require 5.3 metres of 250 mm pipe of which 33% is discarded, while by the method of the invention described with reference to Figures 4 to 7, sixteen saddles for 250 mm pipe are formed from only 2.8 metres of 250 mm pipe with only 4% discarded. An additional benefit of the invention is that a saddle 11 with tongues 17 requires less effort to spring on to the pipe 3 than a saddle 1 of the known type. The undulating cuts 13 may be made by means of a jigsaw with the pipe held in a jig (not shown), while the transverse cuts may be made by a bandsaw. CLAIMS
1. A method of manufacturing branch saddles from plastics pipe comprising making along two opposite locations continuous undulating cuts, cutting each half of the thus cut pipe transversely at regular intervals into saddle portions, and raising a socket or spigot from around a hole in each saddle portion.
2. A method as in Claim 1, wherein the free ends of tongues formed on each side of each saddle portion by the undulating cuts extend to two-thirds of the periphery of the pipe.
3. A method as in Claim 1 or Claim 2, wherein the undulating cuts are sinusoidal.
4. A method as in Claim 3, wherein the transverse cuts extend from or to crests of the undulating cuts.
5. A method as in any one of the preceding Claims, wherein the undulating cuts are made by means of a jigsaw with the pipe held in a jig.
6. A method as in any one of the preceding Claims, wherein the transverse cuts are made by a bandsaw.
7. Branch saddles manufactured by a method as in any one of the preceding Claims.
8. A method of manufacturing branch saddles from plastics pipe substantially as hereinbefore described with reference to Figures 4 to 7 of the accompanying drawings.
9. A branch saddle substantially as hereinbefore described with reference to Figures 5 and 6 of the accompanying drawings.
GB7836479A 1978-09-12 1978-09-12 Branch saddles for plastics pipes Expired GB2029916B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB7836479A GB2029916B (en) 1978-09-12 1978-09-12 Branch saddles for plastics pipes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB7836479A GB2029916B (en) 1978-09-12 1978-09-12 Branch saddles for plastics pipes

Publications (2)

Publication Number Publication Date
GB2029916A true GB2029916A (en) 1980-03-26
GB2029916B GB2029916B (en) 1982-10-06

Family

ID=10499607

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7836479A Expired GB2029916B (en) 1978-09-12 1978-09-12 Branch saddles for plastics pipes

Country Status (1)

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GB (1) GB2029916B (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5437087A (en) * 1993-08-03 1995-08-01 Bell Atlantic Network Services, Inc. Method of attaching an interduct to aduct
US5788414A (en) * 1995-06-02 1998-08-04 Bell Atlantic Network Services, Inc. Fiber optic saddle
DE10111931A1 (en) * 2001-03-13 2002-10-02 Eaton Fluid Power Gmbh Pipe connecting device
WO2003085211A2 (en) * 2002-04-11 2003-10-16 Johannes Petrus Coetzee Katzke Toilet accessory
WO2004018923A1 (en) * 2002-08-21 2004-03-04 Blue Sky Forever, Inc. Apparatus and method for providing access to buried pipeline

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5437087A (en) * 1993-08-03 1995-08-01 Bell Atlantic Network Services, Inc. Method of attaching an interduct to aduct
US5788414A (en) * 1995-06-02 1998-08-04 Bell Atlantic Network Services, Inc. Fiber optic saddle
DE10111931A1 (en) * 2001-03-13 2002-10-02 Eaton Fluid Power Gmbh Pipe connecting device
DE10111931C2 (en) * 2001-03-13 2003-02-13 Eaton Fluid Power Gmbh Pipe connecting device
WO2003085211A2 (en) * 2002-04-11 2003-10-16 Johannes Petrus Coetzee Katzke Toilet accessory
WO2003085211A3 (en) * 2002-04-11 2003-12-24 Johannes Petrus Coetzee Katzke Toilet accessory
WO2004018923A1 (en) * 2002-08-21 2004-03-04 Blue Sky Forever, Inc. Apparatus and method for providing access to buried pipeline

Also Published As

Publication number Publication date
GB2029916B (en) 1982-10-06

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PCNP Patent ceased through non-payment of renewal fee