CA1069959A - Pipe and tubing connectors - Google Patents
Pipe and tubing connectorsInfo
- Publication number
- CA1069959A CA1069959A CA288,631A CA288631A CA1069959A CA 1069959 A CA1069959 A CA 1069959A CA 288631 A CA288631 A CA 288631A CA 1069959 A CA1069959 A CA 1069959A
- Authority
- CA
- Canada
- Prior art keywords
- pipe
- frusto
- jaws
- conical
- sleeve
- 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
- F16L21/00—Joints with sleeve or socket
- F16L21/08—Joints with sleeve or socket with additional locking means
-
- 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
- F16L21/00—Joints with sleeve or socket
- F16L21/02—Joints with sleeve or socket with elastic sealing rings between pipe and sleeve or between pipe and socket, e.g. with rolling or other prefabricated profiled rings
- F16L21/04—Joints with sleeve or socket with elastic sealing rings between pipe and sleeve or between pipe and socket, e.g. with rolling or other prefabricated profiled rings in which sealing rings are compressed by axially-movable members
-
- 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
- F16L47/12—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 with additional locking means
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Joints With Sleeves (AREA)
- Mutual Connection Of Rods And Tubes (AREA)
- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
Abstract
ABSTRACT
A pipe coupling is provided having a sleeve with frusto-conical ends, elastomer gaskets fitting in said frusto-conical ends, a follower at each end of the sleeve having a frusto-conical opening, a plurality of generally triangular jaws fitting in said opening, a split, generally cylindrical, ring between the jaws and pipe end engaging both and tightening means acting on each follower.
A pipe coupling is provided having a sleeve with frusto-conical ends, elastomer gaskets fitting in said frusto-conical ends, a follower at each end of the sleeve having a frusto-conical opening, a plurality of generally triangular jaws fitting in said opening, a split, generally cylindrical, ring between the jaws and pipe end engaging both and tightening means acting on each follower.
Description
95~ ~:
This invention relates to pipe and tubing connectors and par~icular-ly to a connector or coupling adapted to connect metal or plastic pipe or tubing to metal or plastic pipe or tubing to prevent leakage and separation. ~ `
There are many connectors or couplings proposed for connecting metal or plastic pipe ends together or for connecting metal to plastic pipe or tubing. One of the most critical areas for such couplings is in the gas industry where even the smallest amount of leakage can lead to serious, if not fatal, consequences. A very serious problem in this area is to provide a coupling which will permit expansion of the pipe being coupled but will prevent separation of the pipe.
~he present invention provides a coupling which solves these `
problems of the prior art, particularly as they have applied to the gas industry, and provides a coupling which can be used to connect metal pipe to plastic pipe, metal pipe to metal pipe or plastic pipe to plastic pipe. It ~
is, in short, universally adaptable to the materials now used to conduct ~ ~`
fluid materials. It will permit the metal pipe ends to expand into the con-nector but will not permit them to be withdrawn and it will provide a leak proof connection. ~nother problem which applicant has discovered is that ~` when plastic pipe, particularly, is being connected in a very high pressure . . ~ , , . .~ . . .
system or where it is under high tensile load, the plastic pipe will flow and : :
~ permit triangular jaws or the like to tilt and move out of a sleeve type con-~ ( : -, nector.
~- The invention provides a coupling for Joining two spaced coaxial` pipes comprising an elongate sleeve adapted to receive coaxially two opposing ;` pipe ends to be cormected, said sleeve having frusto-conical enlarged ends opening outwardly, a pair of cylindrical elastomer gaskets having frusto~
conical end portions adapted to fit in the frusto-conical ends of said sleeve in sliding engagement around the pipe ends to be connected, a follower member bearing on each of said gaskets to force them into the sleeve ends, a frusto-conical opening in each follower member around the pipe ends being connected, said opening in each follower member having its large end opening toward the large end of the frusto-conical ends of the sleeve, a plurality of generally .... ... .
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triangular jaws regularly spaced apart around each pipe end to be connected within the frusto-conical opening in the follower member, said jaws around each pipe end abutting the adjacent gasket and pressing against said gasket coaxially of said pipe, toothed surface engaging means on the face of each -~
triangular jaw in engagement with the pipe to be connected and tightening means acting on the follower means to move the followers axially together `~
whereby the gaskets are forced into the frusto-conical ends of the sleeve in seallng engagement with said ends and the pipe ends to be connected and simultaneously the triangular jaws are forced into tight radial engagement with the exterior of the pipe ends to be connected so as to prevent the pipe ; ends being moved axially out of the sleeve, said gasket and jaws coacting with each other by bearing against each other.
~; Preferably the triangular jaws are connected together by generally resilient means permitting them to form a generally frusto-conical ring which can be compressed to smaller diameter to engage the pipes being connected.
This may be accomplished by machining a frusto-conical ring and slitting it axially to a point adjacent its base to form a plurality of side-by-side ; triangular jaws, with one slit passing completely through the cone to permit its reduction in diameter. The jaws may also be individually formed and con- ~ ~' nected together by intermediate rubber bonding members which permit the jaws ;
~. -'. .
- to be bent in a circle to form a frusto-conical member. Preferably ~he jaw faces designed to engage the pipe are provided with teeth or knurling to ~
;~ engage the pipe surface. The tightening means between the followers is pre- -- ;
:.: :: .
, ferably a plurality of bolts extending between them through lugs extending ~s, radially outwardly from the followers. In a further modification adapted :; ~, ~:, particularly to connect plastic pipe to metal or plastic where the plastic ; ~
is subject to high pressure or contractive forces, we provide a split metal ;`
ring between the triangular jaws and the pipe and having stop means acting on ~-., both the jaws and the pipe to limit relative movement therebetween.
The invention also provides a coupling for one or more pipes com-prising an elongate sleeve adapted to receive coaxially two opposing pipe ~ -ends to be connected, said sleeve having frusto-conical enlarged ends opening ; ~ -2-- . .. :. . : ., . -: - .. : .. .. :
~169~5g outwardly, a pair of cylindrical elastomer gaskets having frusto-conical end portions adapted to fit in the frusto-conical ends of said sleeve in sliding engagement around the pipe ends to be connected, a follower member bearing on each of said gaskets to force them into the sleeve ends, a frusto- ;
conical opening in each follower member around the pipe ends being connected, said opening in each follower member having its large end opening toward the ~-large end of the frusto-conical ends of the sleeve, a plurality of generally triangular jaws spaced apart around each pipe end to be connected within the frusto-conical opening in the follower member, a split cylinder between said triangular jaws and said pipe to be connected, said split ring having stop --means on both inner and outer surfaces, said jaws around each split cylinder :~
~ abutting the adjacent gasket and pressing against said gasket coaxially of : the pipe, engaging means on each triangular jaw in engagement with the stop -means on the outer surface of said split ring and tightening means acting on the follower means to move the follower means axially together whereby the gaskets are forced into the frusto-conical ends of the sleeve in sealing engagement with said ends and the pipe ends to be connected and simultaneously the triangular jaws are forced into tight radial engagement with the exterior ` of the pipe ends and the split ring around the pipe to be connected so as to .~ 20 prevent the pipe ends being moved axially out of the sleeve.
~- Advantages of this invention will be apparent from a consideration ` of the following description and the accompanying drawings in which:
Figure 1 is a section through a connector according to this inven-tion showing a connection to a metal pipe at one end and a plastic pipe at .
the other, Figure 2 is an exploded fragmentary view of the right end of the ~ -connector of Figure 1 showing the parts involved and one form of triangular jaw holding member, Figure 3 illustrates a second embodiment of triangular jaw member assembly according to this invention;
Figure 4 illustrates a third embodiment of triangular jaw assembly in which spaced jaws are connected by elastomer connectors in a continuous " ,, . -~ _3 ~ .
. .
95~ :
band from which a piece can be cut to form a jaw member assembly for this invention;
Figure 5 illustrates a fourth embodiment of jaw assembly;
Figure 6 illustrate~s another embodiment of jaw assembly for use in the elastomer assembly of Figure 4; :
: Figure 7 is a section through still another embodiment of our ~;
invention particularly for use where high pressures are exerted on plastic pipe; ::
.
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''' - ' ~ :
: ~, ' . , ;, .- ::.
:' ~ ' ~` ~'~; .'.
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.~ :' ~,''`, ~ ' ' ~,,, , . ;, .
-3a-~069~S9 .:
It is, of course, possible to use a plurality of ;
separate jaws spaced about the pipes to be joined but their application is simplified by joining as described herein.
In the jaw assembly illustrated in Figure 5 a frusto-conical metal ring 60 is machined and axial slots 61 are cut from the apex end toward the base but terminate short of the ;
base. A second set of axial slots 62 are cut from the base between slots 61. This gives the unit more radial compressi-bility. --In Figure 6 is illustrated a second form of jaw `
structure in which the base of the jaw is cut at an angle of ;
about 45. This reduces the likelihood of the jaw being tilted as a greater portion of the jaw extends through the conical openings 16a.
In Figures 7, 8 and 9 we have illustrated another embodiment of our invention particularly adapted to hold plastic :.
pipe under high pressure or extreme tensile forces. However, thls embodiment is universally adaptable to metal as well as plastic pipe. In this embodiment like parts to those of Figures l and 2 bear like numbers with a prime suffix. In this embodi-ment a cup shaped follower 70 having a coniGal flange 71 fits -within the axial opening 16a' in the follower 16'. The cGnical flange 71 receives the triangular jaws l9a' and bears against them over a substantial distance, thus restricting their tippi action if caused to move axially. A split cylindrical ring 72 surrounds the plastic pipe ll' between it and jaws l9a'.
This split ring 72 is provided with a radially outwardly extend-ing stop flange 73 at one end and one or more grooves 74 on opposite sides corresponding to grooves 20a' and jaws l9a' ~-which grooves 74 act as stop members holding both the plastic :~
6.
~gi99S9 pipe 11' and jaws 19a' against relative movement. The split 75 in ring 72 is preferably at an angle to the two opposite sides as shown in Figure 8.
In Figure 10 is illustrated a second embodiment of split ring 80 with radial outward flanges 81 and 82 at each end receiving between them jaws 19'. The bottom of ring 80 has grooves 83 engaging the plastic pipe.
While certain perferred embodiments and practices of this invention have been illustrated and described in the fore~
going specification, it will be understood that this invention may be otherwise embodied wit.hin the scope of the following claims.
9~S9 -; .
Figure 8 is an exploded isometric view of the connector of (Figure 7;
Figure 9 is an enlarged fragmentary section of the split ring of Figure 7; and Figure 10 is an enlarged fragmentary section of a second embodiment of split ring.
Referring to the drawings there is illustrated a metal pipe 10 and a plastic pipe 11 to be connected. A sleeve 12, having a slightly larger internal diameter than the external ,.,.. 1:.
10 diameter of pipes 10 and 11, is placed coaxially around the two `
pipes 10 and 11 to be connected. Each end of sleeve 12 has a flared or frusto-conical portion 13 receiving an elastomeric - ~
gasket 14 having a cylindrical portion and a frusto-conical end ~;
portion 14a adapted to fit in the flared end 13 of the sleeve.
The elastomeric gasket 14 is adapted to fit snugly around the ~-pipe ends 10 and 11 to be joined. In the case of plastic pipe 11 a support or stiffener sleeve 15 must be inserted into the interior end to be connected. Such sleeves are a well known article of commerce and are generally provided with a radial ring 15a at one end to abut the end of the plastic pipe. An annular cup shaped follower 16 surrounds each pipe 10 and 11, abuts the gasket 14 and is provided with radial lugs 17 having holes 17a receiving bolts 18 with tightening nuts 18a for draw-ing the followers axially toward the sleeve. Each of the followers 16 has a generally frusto-conical opening 16a receiv-ing spaced triangular jaws 19 either as separate jaw members or preferably connected together in a ring. Each jaw has toothed grooves 20 adapted to engage the surface o~ pipes 10 and 11.
The jaws 19 may bear against elastomer gasket 14 as shown at the 3Q right of Figure 1 or against an intermediate washer 21 as shown "
4.
~ sagsg at the right of Figure 1 or against an intermediate washer 21 as shown at the left of Figure 1. When nuts 18a are tightened on bolts 18 the gaskets 14 are forced into flared ends 13 tightly engaging and sealing the sleeve 12 to the pipe ends 10 and 11. At the same time jaws 19 are compressed by the frusto-conical opening 16a of follower 16 into tight engagement with the exterior surface of pipes 10 and 11 forcing the toothed -~
grooves 20 into the surface of the pipe to hold it against with-drawal from sleeve 12. Thus the sleeve and pipe ends 10 and 11 are simultaneously sealed by gasket 14 and held against with-drawal by jaws 19 upon tightening of nuts 18a on bolts 18.
In the exploded view, E`igure 2, one form of jaw 19 ~ ' -assembly is illustrated. In this form a frusto-conical metal ring 30 is machined and axial slots 31 are cut from the apex and toward the base but terminates short of the base. A single slot '~
32 is cut completely through the ring to permit it to be com-pressed in diameter around pipe 10.
In the form illustrated in E'igure 3 triangular jaws -~
l9a with grooves 2Oa are connected by elastomer members 40 bonded -between each of the jaw assembly l9a and thus permitting the jaws to be compressed about pipes 10 and Il. -In the form illustrated in Figure 4, jaws l9b provided -with knurling 50, are connected by elastomer members 51 bonded to the jaws to form an elongate strip from which a portion may be cut through one of the elastomer members 51 suitable for any given pipe diameter. In the embodiment it is not necessary to carry a plurality of different sizes o~ jaw rings for different -diameters of pipe to be connected because an appropriate length ~ ;~
can be cut in the field to suit the particular pipe being joined.
This invention relates to pipe and tubing connectors and par~icular-ly to a connector or coupling adapted to connect metal or plastic pipe or tubing to metal or plastic pipe or tubing to prevent leakage and separation. ~ `
There are many connectors or couplings proposed for connecting metal or plastic pipe ends together or for connecting metal to plastic pipe or tubing. One of the most critical areas for such couplings is in the gas industry where even the smallest amount of leakage can lead to serious, if not fatal, consequences. A very serious problem in this area is to provide a coupling which will permit expansion of the pipe being coupled but will prevent separation of the pipe.
~he present invention provides a coupling which solves these `
problems of the prior art, particularly as they have applied to the gas industry, and provides a coupling which can be used to connect metal pipe to plastic pipe, metal pipe to metal pipe or plastic pipe to plastic pipe. It ~
is, in short, universally adaptable to the materials now used to conduct ~ ~`
fluid materials. It will permit the metal pipe ends to expand into the con-nector but will not permit them to be withdrawn and it will provide a leak proof connection. ~nother problem which applicant has discovered is that ~` when plastic pipe, particularly, is being connected in a very high pressure . . ~ , , . .~ . . .
system or where it is under high tensile load, the plastic pipe will flow and : :
~ permit triangular jaws or the like to tilt and move out of a sleeve type con-~ ( : -, nector.
~- The invention provides a coupling for Joining two spaced coaxial` pipes comprising an elongate sleeve adapted to receive coaxially two opposing ;` pipe ends to be cormected, said sleeve having frusto-conical enlarged ends opening outwardly, a pair of cylindrical elastomer gaskets having frusto~
conical end portions adapted to fit in the frusto-conical ends of said sleeve in sliding engagement around the pipe ends to be connected, a follower member bearing on each of said gaskets to force them into the sleeve ends, a frusto-conical opening in each follower member around the pipe ends being connected, said opening in each follower member having its large end opening toward the large end of the frusto-conical ends of the sleeve, a plurality of generally .... ... .
.. , , ~ .... , : .~ :, . .
~0~95~5i9 ~:
.,: `
triangular jaws regularly spaced apart around each pipe end to be connected within the frusto-conical opening in the follower member, said jaws around each pipe end abutting the adjacent gasket and pressing against said gasket coaxially of said pipe, toothed surface engaging means on the face of each -~
triangular jaw in engagement with the pipe to be connected and tightening means acting on the follower means to move the followers axially together `~
whereby the gaskets are forced into the frusto-conical ends of the sleeve in seallng engagement with said ends and the pipe ends to be connected and simultaneously the triangular jaws are forced into tight radial engagement with the exterior of the pipe ends to be connected so as to prevent the pipe ; ends being moved axially out of the sleeve, said gasket and jaws coacting with each other by bearing against each other.
~; Preferably the triangular jaws are connected together by generally resilient means permitting them to form a generally frusto-conical ring which can be compressed to smaller diameter to engage the pipes being connected.
This may be accomplished by machining a frusto-conical ring and slitting it axially to a point adjacent its base to form a plurality of side-by-side ; triangular jaws, with one slit passing completely through the cone to permit its reduction in diameter. The jaws may also be individually formed and con- ~ ~' nected together by intermediate rubber bonding members which permit the jaws ;
~. -'. .
- to be bent in a circle to form a frusto-conical member. Preferably ~he jaw faces designed to engage the pipe are provided with teeth or knurling to ~
;~ engage the pipe surface. The tightening means between the followers is pre- -- ;
:.: :: .
, ferably a plurality of bolts extending between them through lugs extending ~s, radially outwardly from the followers. In a further modification adapted :; ~, ~:, particularly to connect plastic pipe to metal or plastic where the plastic ; ~
is subject to high pressure or contractive forces, we provide a split metal ;`
ring between the triangular jaws and the pipe and having stop means acting on ~-., both the jaws and the pipe to limit relative movement therebetween.
The invention also provides a coupling for one or more pipes com-prising an elongate sleeve adapted to receive coaxially two opposing pipe ~ -ends to be connected, said sleeve having frusto-conical enlarged ends opening ; ~ -2-- . .. :. . : ., . -: - .. : .. .. :
~169~5g outwardly, a pair of cylindrical elastomer gaskets having frusto-conical end portions adapted to fit in the frusto-conical ends of said sleeve in sliding engagement around the pipe ends to be connected, a follower member bearing on each of said gaskets to force them into the sleeve ends, a frusto- ;
conical opening in each follower member around the pipe ends being connected, said opening in each follower member having its large end opening toward the ~-large end of the frusto-conical ends of the sleeve, a plurality of generally triangular jaws spaced apart around each pipe end to be connected within the frusto-conical opening in the follower member, a split cylinder between said triangular jaws and said pipe to be connected, said split ring having stop --means on both inner and outer surfaces, said jaws around each split cylinder :~
~ abutting the adjacent gasket and pressing against said gasket coaxially of : the pipe, engaging means on each triangular jaw in engagement with the stop -means on the outer surface of said split ring and tightening means acting on the follower means to move the follower means axially together whereby the gaskets are forced into the frusto-conical ends of the sleeve in sealing engagement with said ends and the pipe ends to be connected and simultaneously the triangular jaws are forced into tight radial engagement with the exterior ` of the pipe ends and the split ring around the pipe to be connected so as to .~ 20 prevent the pipe ends being moved axially out of the sleeve.
~- Advantages of this invention will be apparent from a consideration ` of the following description and the accompanying drawings in which:
Figure 1 is a section through a connector according to this inven-tion showing a connection to a metal pipe at one end and a plastic pipe at .
the other, Figure 2 is an exploded fragmentary view of the right end of the ~ -connector of Figure 1 showing the parts involved and one form of triangular jaw holding member, Figure 3 illustrates a second embodiment of triangular jaw member assembly according to this invention;
Figure 4 illustrates a third embodiment of triangular jaw assembly in which spaced jaws are connected by elastomer connectors in a continuous " ,, . -~ _3 ~ .
. .
95~ :
band from which a piece can be cut to form a jaw member assembly for this invention;
Figure 5 illustrates a fourth embodiment of jaw assembly;
Figure 6 illustrate~s another embodiment of jaw assembly for use in the elastomer assembly of Figure 4; :
: Figure 7 is a section through still another embodiment of our ~;
invention particularly for use where high pressures are exerted on plastic pipe; ::
.
~ ~ ',, .
j - .
''' - ' ~ :
: ~, ' . , ;, .- ::.
:' ~ ' ~` ~'~; .'.
''` i . ~ .
.~ :' ~,''`, ~ ' ' ~,,, , . ;, .
-3a-~069~S9 .:
It is, of course, possible to use a plurality of ;
separate jaws spaced about the pipes to be joined but their application is simplified by joining as described herein.
In the jaw assembly illustrated in Figure 5 a frusto-conical metal ring 60 is machined and axial slots 61 are cut from the apex end toward the base but terminate short of the ;
base. A second set of axial slots 62 are cut from the base between slots 61. This gives the unit more radial compressi-bility. --In Figure 6 is illustrated a second form of jaw `
structure in which the base of the jaw is cut at an angle of ;
about 45. This reduces the likelihood of the jaw being tilted as a greater portion of the jaw extends through the conical openings 16a.
In Figures 7, 8 and 9 we have illustrated another embodiment of our invention particularly adapted to hold plastic :.
pipe under high pressure or extreme tensile forces. However, thls embodiment is universally adaptable to metal as well as plastic pipe. In this embodiment like parts to those of Figures l and 2 bear like numbers with a prime suffix. In this embodi-ment a cup shaped follower 70 having a coniGal flange 71 fits -within the axial opening 16a' in the follower 16'. The cGnical flange 71 receives the triangular jaws l9a' and bears against them over a substantial distance, thus restricting their tippi action if caused to move axially. A split cylindrical ring 72 surrounds the plastic pipe ll' between it and jaws l9a'.
This split ring 72 is provided with a radially outwardly extend-ing stop flange 73 at one end and one or more grooves 74 on opposite sides corresponding to grooves 20a' and jaws l9a' ~-which grooves 74 act as stop members holding both the plastic :~
6.
~gi99S9 pipe 11' and jaws 19a' against relative movement. The split 75 in ring 72 is preferably at an angle to the two opposite sides as shown in Figure 8.
In Figure 10 is illustrated a second embodiment of split ring 80 with radial outward flanges 81 and 82 at each end receiving between them jaws 19'. The bottom of ring 80 has grooves 83 engaging the plastic pipe.
While certain perferred embodiments and practices of this invention have been illustrated and described in the fore~
going specification, it will be understood that this invention may be otherwise embodied wit.hin the scope of the following claims.
9~S9 -; .
Figure 8 is an exploded isometric view of the connector of (Figure 7;
Figure 9 is an enlarged fragmentary section of the split ring of Figure 7; and Figure 10 is an enlarged fragmentary section of a second embodiment of split ring.
Referring to the drawings there is illustrated a metal pipe 10 and a plastic pipe 11 to be connected. A sleeve 12, having a slightly larger internal diameter than the external ,.,.. 1:.
10 diameter of pipes 10 and 11, is placed coaxially around the two `
pipes 10 and 11 to be connected. Each end of sleeve 12 has a flared or frusto-conical portion 13 receiving an elastomeric - ~
gasket 14 having a cylindrical portion and a frusto-conical end ~;
portion 14a adapted to fit in the flared end 13 of the sleeve.
The elastomeric gasket 14 is adapted to fit snugly around the ~-pipe ends 10 and 11 to be joined. In the case of plastic pipe 11 a support or stiffener sleeve 15 must be inserted into the interior end to be connected. Such sleeves are a well known article of commerce and are generally provided with a radial ring 15a at one end to abut the end of the plastic pipe. An annular cup shaped follower 16 surrounds each pipe 10 and 11, abuts the gasket 14 and is provided with radial lugs 17 having holes 17a receiving bolts 18 with tightening nuts 18a for draw-ing the followers axially toward the sleeve. Each of the followers 16 has a generally frusto-conical opening 16a receiv-ing spaced triangular jaws 19 either as separate jaw members or preferably connected together in a ring. Each jaw has toothed grooves 20 adapted to engage the surface o~ pipes 10 and 11.
The jaws 19 may bear against elastomer gasket 14 as shown at the 3Q right of Figure 1 or against an intermediate washer 21 as shown "
4.
~ sagsg at the right of Figure 1 or against an intermediate washer 21 as shown at the left of Figure 1. When nuts 18a are tightened on bolts 18 the gaskets 14 are forced into flared ends 13 tightly engaging and sealing the sleeve 12 to the pipe ends 10 and 11. At the same time jaws 19 are compressed by the frusto-conical opening 16a of follower 16 into tight engagement with the exterior surface of pipes 10 and 11 forcing the toothed -~
grooves 20 into the surface of the pipe to hold it against with-drawal from sleeve 12. Thus the sleeve and pipe ends 10 and 11 are simultaneously sealed by gasket 14 and held against with-drawal by jaws 19 upon tightening of nuts 18a on bolts 18.
In the exploded view, E`igure 2, one form of jaw 19 ~ ' -assembly is illustrated. In this form a frusto-conical metal ring 30 is machined and axial slots 31 are cut from the apex and toward the base but terminates short of the base. A single slot '~
32 is cut completely through the ring to permit it to be com-pressed in diameter around pipe 10.
In the form illustrated in E'igure 3 triangular jaws -~
l9a with grooves 2Oa are connected by elastomer members 40 bonded -between each of the jaw assembly l9a and thus permitting the jaws to be compressed about pipes 10 and Il. -In the form illustrated in Figure 4, jaws l9b provided -with knurling 50, are connected by elastomer members 51 bonded to the jaws to form an elongate strip from which a portion may be cut through one of the elastomer members 51 suitable for any given pipe diameter. In the embodiment it is not necessary to carry a plurality of different sizes o~ jaw rings for different -diameters of pipe to be connected because an appropriate length ~ ;~
can be cut in the field to suit the particular pipe being joined.
Claims (14)
1. A coupling for joining two spaced coaxial pipes comprising an elongate sleeve adapted to receive coaxially two opposing pipe ends to be connected, said sleeve having frusto-conical enlarged ends opening outwardly, a pair of cylindrical elastomer gaskets having frusto-conical end portions adapted to fit in the frusto-conical ends of said sleeve in sliding engage-ment around the pipe ends to be connected, a follower member bearing on each of said gaskets to force them into the sleeve ends, a frusto-conical opening in each follower member around the pipe ends being connected, said opening in each follower member having its large end opening toward the large end of the frusto-conical ends of the sleeve, a plurality of generally triangular jaws regularly spaced apart around each pipe end to be connected within the frusto-conical opening in the follower member, said jaws around each pipe end abutting the adjacent gasket and pressing against said gasket coaxially of said pipe, toothed surface engaging means on the face of each triangular jaw in engagement with the pipe to be connected and tightening means acting on the follower means to move the followers axially together whereby the gaskets are forced into the frusto-conical ends of the sleeve in sealing engagement with said ends and the pipe ends to be connected and simultaneously the tri-angular jaws are forced into tight radial engagement with the exterior of the pipe ends to be connected so as to prevent the pipe ends being moved axially out of the sleeve, said gasket and jaws coacting with each other by bearing against each other.
2. A connector as claimed in claim 1 wherein a floating annular washer having a diameter smaller than the largest diameter of the gasket is placed between the elastomer gasket and the triangular jaws within the follower means, to generally equalize the coacting forces between them.
3. A connector as claimed in claim 1 wherein the triangular jaws are connected together in the form of a ring having at least one aperture permitt-ing the ring to be reduced in diameter.
4. A connector as claimed in claim 3 wherein the jaws are in the form of a slotted metal frusto-conical ring having a single aperture through the ring to permit reduction of its diameter.
5. A connector as claimed in claim 1 wherein the surface engaging means on the triangular jaws is a series of axially spaced teeth.
6. A connector as claimed in claim 1 wherein the surfacing engaging means is a knurled surface on the triangular jaw.
7. A connector as claimed in claim 1 wherein the triangular jaws are connected by elastomer members.
8. A coupling for one or more pipes comprising an elongate sleeve adapted to receive coaxially two opposing pipe ends to be connected, said sleeve having frusto-conical enlarged ends opening outwardly, a pair of cylindrical elastomer gaskets having frusto-conical end portions adapted to fit in the frusto-conical ends of said sleeve in sliding engagement around the pipe ends to be connected, a follower member bearing on each of said gaskets to force them into the sleeve ends, a frusto-conical opening in each follower member around the pipe ends being connected, said opening in each follower member having its large end opening toward the large end of the frusto-conical ends of the sleeve, a plurality of generally triangular jaws spaced apart around each pipe end to be connected within the frusto-conical opening in the follower member, a split cylinder between said triangular jaws and said pipe to be connected, said split ring having stop means on both inner and outer surfaces, said jaws around each split cylinder abutting the adjacent gasket and pressing against said gasket coaxially of the pipe, engag-ing means on each triangular jaw in engagement with the stop means on the outer surface of said split ring and tightening means acting on the follower means to move the follower means axially together whereby the gaskets are forced into the frusto-conical ends of the sleeve in sealing engagement with said ends and the pipe ends to be connected and simultaneously the triangular jaws are forced into tight radial engagement with the exterior of the pipe ends and the split ring around the pipe to be connected so as to prevent the pipe ends being moved axially out of the sleeve.
9. A connector as claimed in claim 8 wherein a floating annular washer having a diameter smaller than the largest diameter of the gasket is placed between the elastomer gasket and the triangular jaws within the follower means, to generally equalize the coacting forces between them.
10. A connector as claimed in claim 8 wherein the triangular jaws are connected together in the form of a ring having at least one aperture permit-ting the ring to be reduced in diameter.
11. A connector as claimed in claim 8 wherein the jaws are provided with annular grooves and the split cylinder has inner and outer corresponding grooves engaging the grooves in the jaw on one side and the outer surface of the pipe to be connected on the other side.
12. A connector as claimed in claim 8 wherein the engaging means on the triangular jaws is a series of axially spaced teeth, and the stop means on the split cylinder are corresponding annular grooves receiving said teeth.
13. A connector as claimed in claim 12 wherein the engaging means on the split cylinder also includes an annular radial flange engaging the end of the teeth within the follower.
14. A connector as claimed in claim 8 wherein the triangular jaws are connected by elastomer members.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA337,807A CA1078427A (en) | 1976-11-01 | 1979-10-17 | Jaw assembly for pipe connector |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US05/737,700 US4070046A (en) | 1976-11-01 | 1976-11-01 | Pipe and tubing connecting sleeve |
| US05/814,435 US4119335A (en) | 1976-11-01 | 1977-07-11 | Pipe and tubing connectors |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1069959A true CA1069959A (en) | 1980-01-15 |
Family
ID=27113245
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA288,631A Expired CA1069959A (en) | 1976-11-01 | 1977-10-13 | Pipe and tubing connectors |
Country Status (4)
| Country | Link |
|---|---|
| CA (1) | CA1069959A (en) |
| DE (1) | DE2748429A1 (en) |
| FR (1) | FR2369495A1 (en) |
| GB (1) | GB1591743A (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2900678A1 (en) * | 1979-01-10 | 1980-07-24 | Immendinger Giesserei Masch | THROTTLE LOCK FOR PIPE CONNECTIONS |
| FR2540223A1 (en) * | 1983-02-01 | 1984-08-03 | Pont A Mousson | Locked sealing joint with angular deflection for interlocking cast iron tubular pipes and connections |
| GB2146722B (en) * | 1983-09-12 | 1987-01-28 | Coupling Syst | Pipe couplings |
| EP0186716A1 (en) * | 1984-12-19 | 1986-07-09 | Coenraad Cornelius Delport | Pipe couplings |
| GB8830202D0 (en) * | 1988-12-23 | 1989-02-22 | Parkfield Group Plc | Pipe coupling |
| DE8905558U1 (en) * | 1989-05-03 | 1990-06-21 | Wheli Inter Ag, Zug, Ch | |
| US5779285A (en) * | 1996-02-27 | 1998-07-14 | Perfection Corporation | Pipe coupling assembly |
| NL1009734C2 (en) * | 1998-07-24 | 2000-01-25 | Fischer Georg Waga Nv | Coupling device and method for the manufacture of a grip ring to be used in such a coupling device. |
| NL1002514C2 (en) | 1996-03-04 | 1997-09-05 | Fischer Georg Waga Nv | Coupling device. |
| CN114222883A (en) * | 2020-04-30 | 2022-03-22 | 东洋克斯株式会社 | Sleeve for pipe joint and pipe joint provided with sleeve for pipe joint |
| AT524049B1 (en) * | 2020-12-15 | 2022-02-15 | E Hawle Armaturenwerke Gmbh | PIPE CONNECTION DEVICE WITH A SEAL CARRIER |
| DE102022116679A1 (en) | 2022-07-05 | 2024-01-11 | Viega Technology Gmbh & Co. Kg | Clamping ring for a fitting and fitting with a clamping ring |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2269965A (en) * | 1939-10-23 | 1942-01-13 | Ernest E Wemp | Duodirectional-unidirectional coupling |
| US2531922A (en) * | 1945-02-08 | 1950-11-28 | Pidco Ltd | Pipe coupling and the like |
| US2470546A (en) * | 1946-03-30 | 1949-05-17 | Bert G Carlson | Tube securing means |
| US2540368A (en) * | 1948-03-19 | 1951-02-06 | Harry E Karr | Flareless tube and pipe coupling |
| US2779610A (en) * | 1950-05-23 | 1957-01-29 | Dresser Ind | Sealed pipe coupling with constrictible wedge bushing |
| US2787479A (en) * | 1952-12-19 | 1957-04-02 | Dresser Ind | Thimble type pipe coupling with pipe wedging means |
-
1977
- 1977-10-13 CA CA288,631A patent/CA1069959A/en not_active Expired
- 1977-10-27 GB GB4470077A patent/GB1591743A/en not_active Expired
- 1977-10-28 DE DE19772748429 patent/DE2748429A1/en not_active Withdrawn
- 1977-10-28 FR FR7732823A patent/FR2369495A1/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| GB1591743A (en) | 1981-06-24 |
| FR2369495A1 (en) | 1978-05-26 |
| DE2748429A1 (en) | 1978-05-03 |
| AU3011577A (en) | 1979-05-03 |
| FR2369495B1 (en) | 1984-10-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |