GB2042118A - Pipe coupling - Google Patents

Pipe coupling Download PDF

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Publication number
GB2042118A
GB2042118A GB8001929A GB8001929A GB2042118A GB 2042118 A GB2042118 A GB 2042118A GB 8001929 A GB8001929 A GB 8001929A GB 8001929 A GB8001929 A GB 8001929A GB 2042118 A GB2042118 A GB 2042118A
Authority
GB
United Kingdom
Prior art keywords
sleeve
pipes
coupling
pair
pipe coupling
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Withdrawn
Application number
GB8001929A
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.)
WEIR POLYPAC Ltd
Original Assignee
WEIR POLYPAC 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 WEIR POLYPAC Ltd filed Critical WEIR POLYPAC Ltd
Publication of GB2042118A publication Critical patent/GB2042118A/en
Withdrawn legal-status Critical Current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
    • F16L27/00—Adjustable joints, Joints allowing movement
    • F16L27/10—Adjustable joints, Joints allowing movement comprising a flexible connection only, e.g. for damping vibrations
    • F16L27/107—Adjustable joints, Joints allowing movement comprising a flexible connection only, e.g. for damping vibrations the ends of the pipe being interconnected by a flexible sleeve
    • F16L27/11—Adjustable joints, Joints allowing movement comprising a flexible connection only, e.g. for damping vibrations the ends of the pipe being interconnected by a flexible sleeve the sleeve having the form of a bellows with multiple corrugations
    • 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
    • F16L47/06—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics with sleeve or socket formed by or in the pipe end

Abstract

A pipe coupling for connecting a pair of pipes 17, 18 comprises a sleeve 10 formed from resilient material which can be located within the ends of the pipes. The coupling at its opposite ends defines outwardly inclined sealing lips 12 which deform to establish fluid tight engagement with the interior surfaces of the pipes. A central peripheral rib 13 defines the extent of penetration of the coupling ends into the pipes and circumferential ribs 14 are formed on the periphery of the sleeve intermediate its ends. In an alternative arrangement each half of the coupling may be provided with a rib 13, the ribs being separated by an integral convoluted portion to allow for relative inclination between the pipes 17, 18. <IMAGE>

Description

SPECIFICATION Pipe couplings This invention relates to a pipe coupling for establishing a fluid tight connection between a pair of pipes and has for its object to provide such a coupling in a simple and convenient form.
According to the invention a pipe coupling for the purpose specified comprises a sleeve formed from resilient material and which in use, is located within the adjacent ends of a pair of pipes to be connected, said sleeve at its outer ends respectively, defining outwardly inclined sealing lips which in use, establish fluid tight engagement with the interior surfaces of the pipes.
According to a further feature of the invention, the exterior surface of said sleeve intermediate the ends is provided with a plurality of spaced circumferential ribs.
According to a further feature of the invention, the sleeve is provided with a locating rib on its external surface substantially mid-way between its ends to determine the distance the sleeve in use, can be inserted into the end of a pipe.
One example of a pipe coupling in accordance with the invention will now be described with reference to the accompanying drawings in which: Figure 1 shows the coupling prior to its insertion within a pair of pipes, Figure 2 shows the coupling in position within a pair of pipes, and Figure 3 shows an alternative construction of the coupling.
Referring to the drawings, the pipe coupling comprises a sleeve 10 formed from resilient material conveniently a synthetic rubber able to withstand without deterioration, the working fluid which it is intended to convey through the coupling. At its outer ends, the central bore 11 of the sleeve is flared outwardly as also is the body of the sleeve to define a pair of sealing lips 12. Moreover, substantially mid-way between its ends the external peripheral surface of the sleeve is provided with a locating rib 13 the purpose of which will be described. In addition, between the sealing lips 12 and the rib 13 there is formed on the external peripheral surface of the sleeve a plurality of circumferential ribs 14.
The internal bore 11 of the sleeve defines a pair of spaced circumferentially extending ribs 15 which define between them, a recess for an annular rigid body 16 which may for example be metal but which may for example be formed for a material which will expand under the action of the fluid carried by the coupling.
In use, and as shown in Figure 2, the sleeve 10 is inserted into the ends of a pair of pipes 17, 18. The rib 13 determines by its abutment with the end surfaces of the pipes, the penetration of the sleeve into each pipe. During the insertion of the sleeve into the pipes, the ribs 14 are deformed and form supplementary seals with the internal surfaces of the respective pipes. The main seal is however, formed by the sealing lips 12 which in the natural state of the seal as seen in Figure 1, have sharp peripheral edges. Upon insertion of the sleeve into the pipes, substantial deformation of the aforesaid edges takes place and good fluid sealing engagement between the interior surfaces of the pipes and the sealing lips is obtained.
In the case where the body 16 is formed from the material which expands under the action of the fluid, expansion of the body will take place when fluid passes through the pipes and this expansion presses the intermediate portion of the sleeve into firm engagement with the interior surfaces of the pipes.
Even when the body 16 is metal it acts to resist deformation of the sleeve 10 and thereby the intermediate portion of the sleeve is passed into engagement with the interior surfaces of the pipes.
It is desirable to retain the two ends of the pipes relative to each other and for this purpose clips (not shown) may be provided. The sleeve however, when the expansion of the annular body 16 has taken place will tend to resist movement of the ends of the pipes away from each other under the action for example of the pressure of the working fluid passing through the pipes. This pressure by virtue of the outwardly flared surfaces of the sealing lips, will tend to pressure actuate the lips 12 into firm engagement with the interior surfaces of the pipes.
The construction shown in Figure 3 provides for the axes of the pipes to be inclined relative to each other either during installation or in use. The coupling shown in Figure 3 in effect comprises the coupling of Figure 1 divided into two parts which are connected by an integral convoluted portion 19.
Each half of the coupling is provided with a rib 13, a pair of ribs 15 which locate a shortened body 16.
It is envisaged that the form of pipe coupling described will be particularly useful in the horticultural field where for example, the pipes form part of a greenhouse heating system.
1. A pipe coupling for establishing a fluid tight connection between pair of pipes and comprising a sleeve formed from resilient material and which in use, is located within the adjacent ends of a pair of pipes to be connected, said sleeve at its outer ends respectively, defining outwardly inclined sealing lips which in use, establish fluid tight engagement with the interior surface of the pipes.
2. A pipe coupling according to claim 1 in which the exterior surface of said sleeve intermediate the ends is provided with a plurality of spaced circumferential ribs.
3. A pipe coupling according to claim 1 or claim 2 in which the sleeve is provided with a locating rib on its external surface substantially mid-way between its ends to determine the distance the sleeve in use, can be inserted into the end of a pipe.
4. A pipe coupling according to any one of the preceding claims in which there is located within the sleeve an annular rigid body which acts in use, to restrict deformation of the intermediate portion of the sleeve.
5. A pipe coupling according to claims 1,2 or 3 in which the exterior surface of said sleeve is provided
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (9)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Pipe couplings This invention relates to a pipe coupling for establishing a fluid tight connection between a pair of pipes and has for its object to provide such a coupling in a simple and convenient form. According to the invention a pipe coupling for the purpose specified comprises a sleeve formed from resilient material and which in use, is located within the adjacent ends of a pair of pipes to be connected, said sleeve at its outer ends respectively, defining outwardly inclined sealing lips which in use, establish fluid tight engagement with the interior surfaces of the pipes. According to a further feature of the invention, the exterior surface of said sleeve intermediate the ends is provided with a plurality of spaced circumferential ribs. According to a further feature of the invention, the sleeve is provided with a locating rib on its external surface substantially mid-way between its ends to determine the distance the sleeve in use, can be inserted into the end of a pipe. One example of a pipe coupling in accordance with the invention will now be described with reference to the accompanying drawings in which: Figure 1 shows the coupling prior to its insertion within a pair of pipes, Figure 2 shows the coupling in position within a pair of pipes, and Figure 3 shows an alternative construction of the coupling. Referring to the drawings, the pipe coupling comprises a sleeve 10 formed from resilient material conveniently a synthetic rubber able to withstand without deterioration, the working fluid which it is intended to convey through the coupling. At its outer ends, the central bore 11 of the sleeve is flared outwardly as also is the body of the sleeve to define a pair of sealing lips 12. Moreover, substantially mid-way between its ends the external peripheral surface of the sleeve is provided with a locating rib 13 the purpose of which will be described. In addition, between the sealing lips 12 and the rib 13 there is formed on the external peripheral surface of the sleeve a plurality of circumferential ribs 14. The internal bore 11 of the sleeve defines a pair of spaced circumferentially extending ribs 15 which define between them, a recess for an annular rigid body 16 which may for example be metal but which may for example be formed for a material which will expand under the action of the fluid carried by the coupling. In use, and as shown in Figure 2, the sleeve 10 is inserted into the ends of a pair of pipes 17, 18. The rib 13 determines by its abutment with the end surfaces of the pipes, the penetration of the sleeve into each pipe. During the insertion of the sleeve into the pipes, the ribs 14 are deformed and form supplementary seals with the internal surfaces of the respective pipes. The main seal is however, formed by the sealing lips 12 which in the natural state of the seal as seen in Figure 1, have sharp peripheral edges. Upon insertion of the sleeve into the pipes, substantial deformation of the aforesaid edges takes place and good fluid sealing engagement between the interior surfaces of the pipes and the sealing lips is obtained. In the case where the body 16 is formed from the material which expands under the action of the fluid, expansion of the body will take place when fluid passes through the pipes and this expansion presses the intermediate portion of the sleeve into firm engagement with the interior surfaces of the pipes. Even when the body 16 is metal it acts to resist deformation of the sleeve 10 and thereby the intermediate portion of the sleeve is passed into engagement with the interior surfaces of the pipes. It is desirable to retain the two ends of the pipes relative to each other and for this purpose clips (not shown) may be provided. The sleeve however, when the expansion of the annular body 16 has taken place will tend to resist movement of the ends of the pipes away from each other under the action for example of the pressure of the working fluid passing through the pipes. This pressure by virtue of the outwardly flared surfaces of the sealing lips, will tend to pressure actuate the lips 12 into firm engagement with the interior surfaces of the pipes. The construction shown in Figure 3 provides for the axes of the pipes to be inclined relative to each other either during installation or in use. The coupling shown in Figure 3 in effect comprises the coupling of Figure 1 divided into two parts which are connected by an integral convoluted portion 19. Each half of the coupling is provided with a rib 13, a pair of ribs 15 which locate a shortened body 16. It is envisaged that the form of pipe coupling described will be particularly useful in the horticultural field where for example, the pipes form part of a greenhouse heating system. CLAIMS
1. A pipe coupling for establishing a fluid tight connection between pair of pipes and comprising a sleeve formed from resilient material and which in use, is located within the adjacent ends of a pair of pipes to be connected, said sleeve at its outer ends respectively, defining outwardly inclined sealing lips which in use, establish fluid tight engagement with the interior surface of the pipes.
2. A pipe coupling according to claim 1 in which the exterior surface of said sleeve intermediate the ends is provided with a plurality of spaced circumferential ribs.
3. A pipe coupling according to claim 1 or claim 2 in which the sleeve is provided with a locating rib on its external surface substantially mid-way between its ends to determine the distance the sleeve in use, can be inserted into the end of a pipe.
4. A pipe coupling according to any one of the preceding claims in which there is located within the sleeve an annular rigid body which acts in use, to restrict deformation of the intermediate portion of the sleeve.
5. A pipe coupling according to claims 1,2 or 3 in which the exterior surface of said sleeve is provided with a pair of spaced locating ribs which act in use to determine the extent the end portion of the sleeve can be inserted into the pipes respectively, said sleeve intermediate the locating ribs being of convoluted form.
6. A pipe coupling according to claim Sin which the end portions of the sleeve are each provided with an annular rigid body which acts in use, to restrict deformation of the respective portion of the sleeve.
7. A pipe coupling according to claim 4 or claim 6 in which said annular body or bodies is/are formed from a material which in use, expands under the action of the fluid flowing through the coupling.
8. A pipe coupling according to claim 4 or claim 5 in which said annular body or bodies is/are located within a circumferential recess or recesses defined in the interior surface of the sleeve.
9. A pipe coupling for establishing a fluid tight connection between a pair of pipes and comprising the combination and arrangement of parts substantially as hereinbefore described with reference to the accompanying drawings.
GB8001929A 1979-02-13 1980-01-21 Pipe coupling Withdrawn GB2042118A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB7905093 1979-02-13

Publications (1)

Publication Number Publication Date
GB2042118A true GB2042118A (en) 1980-09-17

Family

ID=10503173

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8001929A Withdrawn GB2042118A (en) 1979-02-13 1980-01-21 Pipe coupling

Country Status (2)

Country Link
GB (1) GB2042118A (en)
NL (1) NL8000912A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3310893A1 (en) * 1983-03-25 1984-10-04 Festo-Maschinenfabrik Gottlieb Stoll, 7300 Esslingen POETRY
GB2153030A (en) * 1984-01-18 1985-08-14 Mtu Muenchen Gmbh Self-acting gap seal
US4685704A (en) * 1984-01-20 1987-08-11 Steinburg Aktiengesellschaft Cuff for sealing joints of pipes
US6692039B2 (en) * 2002-02-08 2004-02-17 Hunting Hti Rehab, Inc., Llc Internal conduit sealing installation
GB2442292A (en) * 2006-09-29 2008-04-02 Specialist Insulation Ltd Insulating products

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3310893A1 (en) * 1983-03-25 1984-10-04 Festo-Maschinenfabrik Gottlieb Stoll, 7300 Esslingen POETRY
GB2153030A (en) * 1984-01-18 1985-08-14 Mtu Muenchen Gmbh Self-acting gap seal
US4685704A (en) * 1984-01-20 1987-08-11 Steinburg Aktiengesellschaft Cuff for sealing joints of pipes
US6692039B2 (en) * 2002-02-08 2004-02-17 Hunting Hti Rehab, Inc., Llc Internal conduit sealing installation
GB2442292A (en) * 2006-09-29 2008-04-02 Specialist Insulation Ltd Insulating products
GB2442292B (en) * 2006-09-29 2008-10-15 Specialist Insulation Ltd Insulating ductwork products
US8950439B2 (en) 2006-09-29 2015-02-10 Spiralite Holdings Limited Insulated ductwork products

Also Published As

Publication number Publication date
NL8000912A (en) 1980-08-15

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WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)