CA1078427A - Jaw assembly for pipe connector - Google Patents
Jaw assembly for pipe connectorInfo
- Publication number
- CA1078427A CA1078427A CA337,807A CA337807A CA1078427A CA 1078427 A CA1078427 A CA 1078427A CA 337807 A CA337807 A CA 337807A CA 1078427 A CA1078427 A CA 1078427A
- Authority
- CA
- Canada
- Prior art keywords
- jaws
- pipe
- jaw assembly
- frusto
- plastic pipe
- 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
Landscapes
- Joints With Sleeves (AREA)
Abstract
ABSTRACT
A jaw assembly is provided for use in pipe coupling 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. The jaw assembly comprises an elongate ribbon of spaced triangular jaws connected by elastomer members.
A jaw assembly is provided for use in pipe coupling 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. The jaw assembly comprises an elongate ribbon of spaced triangular jaws connected by elastomer members.
Description
` 1~784~Z7 This is a division of our Co-pending Canadian Patent Application No. 288,631 filed October 13th 1977.
This invention relates to pipe and tubing connectors and particularly to a jaw assembly for use in a connector or coupling adapted to connect metal or plastic pipe or tubing to metal or plastic pipe or tubing to prevent leak-age and separation.
` There are many connectors or co~lpling proposed for connecting metal or plastic pipe ends together or for connecting metal to plastic pipe or tub-ing. Gne 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 separa-tion of the pipe.
The copending application describes and claims 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.
~t 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 wi*hdrawn and it will provide a leak proof connection. Another 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 *riangular jaws or the like to tilt and move out of a sleeve type connector.
The present invention provides a jaw assembly for use in pipe con-nectors ha~ing a follower member with a frusto-conical opening comprising an elongate ribbon of spaced triangular ~aws connected by elastomer members.
The ja~s may be individually formed and connected together by intermediate - :
. ,'' ', ~ ' .'." ' '., . " ' ' ' ..
~L~7~ 7 rubber bonding members ~hich permit the jaws to be bent in a circle to form a frusto-conical member. Preferably the jaw faces designed to engage the pipe are provided Nith teeth or knurling to engage the pipe surface. The jaws can be provided in elongate strip form and a portion can be cut to length to suit an~ giv~n pipe diameter.
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.
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 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 con-nector of Figure 1 showing the parts involved and one form of triangular jaw holding member;
Figure 3 illustrates an embodiment of triangular jaw member assembly according to this invention;
Figure 4 illustrates a second embodiment of triangular jaw assembly in which spaced jaws are connected by elastomer connectors in a continuous band from which a piece can be cut to form a jaw member assembly for this in-~ention;
Figure 5 illustrates an alternative of jaw assembly;
Figure 5 illustrates another embodiment of jaw assembly for use in the elastomer assemb:Ly of Figure 4;
Pigure 7 is a section through still another connector particularly for use where high pressures are exerted on plastic pipe;
'7~
Pigure 8 is an exploded iso~etric view of the connector of Figure 7;
Pigure 9 is an enlarged fragmentary section of the split ring of Figure 7; and Figure 10 is an enlarged ~ragmentary 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 lnternal diameter than the external 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 adapt-ed to fit snugly around the pipe ends 10 and 11 to be joined. In the case of plastic pipe 11 a support or s~iffener sleeve 15 must be inserted into the interior end to be connected. Such sleeves are a well known article of com-merce 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 drawing the follow-ers axially toward the sleeve. Each of the followers 16 has a generally frusto-conical opening 16a receiving 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 of pipes 10 and 11. The ~a~s 19 may~ bear against elastomer gasket 14 as shown at the right of Figure 1 or against an intermediate washer 21 as shown 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 .
. . .
- , -- . . .
.. ' ' ' : ~ . ~ ' : ,. : .. . :
~ . - ' ' ' - ': . . - , ' ~:
1~7~4.'~7 same time jaws l9 are compressed by~ the ~rusto-conical opening 16a of follower 16 into tight engagement with t~e exterior surface of pipes lO and ll forcing the toothed groo~es 20 into the surface Oe the pipe to hold it against with-drawal from sleeve 12. Thus the slee~e and pipe ends 10 and 11 are simultane-ously sealed by gasket 14 and held against withdrawal by jaws 19 upon tighten-ing of nuts 18a on bolts 18.
In the exploded view, Figure 2, one form o~ 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 compressed in diameter around pipe 10.
In the form illustrated ~n Fi~gure 3triangular jaws l9a with grooves 20a are connected by elastomer members 40 bonded between each of the jaw as-sembly l9a and thus permitting the jaws to be compressed about pipes 10 and 11.
In the form illustrated in Figure 4, ~aws l9b provided with knurling 50, are connected b~ elastomer members 51 bonded to the jaws to form an elon-gate strip rom which a portion may be cut through one of the elastomer mem-bers 51 suitable for an~ given pipe diameter. ln the embodiment it is not necessary to carry a plurality of different sizes of 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.
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 ~oining 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 termlnate short of the base. A ~econd set of axi~l slots 62 are cut ~rom the base bet~een slots 61. This gi~es the unit more radial compressibil~
it~.
~ n Pigure 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 likeli-hood of the jaw being tilted as a greater portion of the jaw extends through the conical openings 16a.
In ~igures 7, 8 and 9 we have illustrated another connector par-ticularly adapted to hold plastic pipe under high pressure or extreme tensile forces. However, this embodiment is universally adaptable to metal as well as plastic pipe. In this embodiment like parts to those of Figures 1 and 2 bear like numbers with a prime suffix. In this embodiment a cup shaped follower 70 having a conical flange 71 fits within the axial opening 16a' in the follower 16'. The conical flange 71 receives the triangular jaws l9a' and bears against them over a substantial distance, thus restricting their tipping ac-tion if caused to move axially. A split cylindrical ring 72 surrounds the plastic pipe 11' between it and jaws 19a'. This split ring 72 is provided with a radiall~ outwardly extending 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 pipe 11' and jaws l9a' 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.
~ hile certain preferred embodiments and practices of this invention have been illustrated and described in the foregoing specification, it will be understood that this invention may be otherwise embodied within the scope of the following claims.
`' ':. ' ' . ' ' i'' ' ~ . . ' ' .
:. .
This invention relates to pipe and tubing connectors and particularly to a jaw assembly for use in a connector or coupling adapted to connect metal or plastic pipe or tubing to metal or plastic pipe or tubing to prevent leak-age and separation.
` There are many connectors or co~lpling proposed for connecting metal or plastic pipe ends together or for connecting metal to plastic pipe or tub-ing. Gne 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 separa-tion of the pipe.
The copending application describes and claims 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.
~t 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 wi*hdrawn and it will provide a leak proof connection. Another 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 *riangular jaws or the like to tilt and move out of a sleeve type connector.
The present invention provides a jaw assembly for use in pipe con-nectors ha~ing a follower member with a frusto-conical opening comprising an elongate ribbon of spaced triangular ~aws connected by elastomer members.
The ja~s may be individually formed and connected together by intermediate - :
. ,'' ', ~ ' .'." ' '., . " ' ' ' ..
~L~7~ 7 rubber bonding members ~hich permit the jaws to be bent in a circle to form a frusto-conical member. Preferably the jaw faces designed to engage the pipe are provided Nith teeth or knurling to engage the pipe surface. The jaws can be provided in elongate strip form and a portion can be cut to length to suit an~ giv~n pipe diameter.
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.
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 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 con-nector of Figure 1 showing the parts involved and one form of triangular jaw holding member;
Figure 3 illustrates an embodiment of triangular jaw member assembly according to this invention;
Figure 4 illustrates a second embodiment of triangular jaw assembly in which spaced jaws are connected by elastomer connectors in a continuous band from which a piece can be cut to form a jaw member assembly for this in-~ention;
Figure 5 illustrates an alternative of jaw assembly;
Figure 5 illustrates another embodiment of jaw assembly for use in the elastomer assemb:Ly of Figure 4;
Pigure 7 is a section through still another connector particularly for use where high pressures are exerted on plastic pipe;
'7~
Pigure 8 is an exploded iso~etric view of the connector of Figure 7;
Pigure 9 is an enlarged fragmentary section of the split ring of Figure 7; and Figure 10 is an enlarged ~ragmentary 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 lnternal diameter than the external 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 adapt-ed to fit snugly around the pipe ends 10 and 11 to be joined. In the case of plastic pipe 11 a support or s~iffener sleeve 15 must be inserted into the interior end to be connected. Such sleeves are a well known article of com-merce 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 drawing the follow-ers axially toward the sleeve. Each of the followers 16 has a generally frusto-conical opening 16a receiving 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 of pipes 10 and 11. The ~a~s 19 may~ bear against elastomer gasket 14 as shown at the right of Figure 1 or against an intermediate washer 21 as shown 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 .
. . .
- , -- . . .
.. ' ' ' : ~ . ~ ' : ,. : .. . :
~ . - ' ' ' - ': . . - , ' ~:
1~7~4.'~7 same time jaws l9 are compressed by~ the ~rusto-conical opening 16a of follower 16 into tight engagement with t~e exterior surface of pipes lO and ll forcing the toothed groo~es 20 into the surface Oe the pipe to hold it against with-drawal from sleeve 12. Thus the slee~e and pipe ends 10 and 11 are simultane-ously sealed by gasket 14 and held against withdrawal by jaws 19 upon tighten-ing of nuts 18a on bolts 18.
In the exploded view, Figure 2, one form o~ 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 compressed in diameter around pipe 10.
In the form illustrated ~n Fi~gure 3triangular jaws l9a with grooves 20a are connected by elastomer members 40 bonded between each of the jaw as-sembly l9a and thus permitting the jaws to be compressed about pipes 10 and 11.
In the form illustrated in Figure 4, ~aws l9b provided with knurling 50, are connected b~ elastomer members 51 bonded to the jaws to form an elon-gate strip rom which a portion may be cut through one of the elastomer mem-bers 51 suitable for an~ given pipe diameter. ln the embodiment it is not necessary to carry a plurality of different sizes of 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.
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 ~oining 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 termlnate short of the base. A ~econd set of axi~l slots 62 are cut ~rom the base bet~een slots 61. This gi~es the unit more radial compressibil~
it~.
~ n Pigure 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 likeli-hood of the jaw being tilted as a greater portion of the jaw extends through the conical openings 16a.
In ~igures 7, 8 and 9 we have illustrated another connector par-ticularly adapted to hold plastic pipe under high pressure or extreme tensile forces. However, this embodiment is universally adaptable to metal as well as plastic pipe. In this embodiment like parts to those of Figures 1 and 2 bear like numbers with a prime suffix. In this embodiment a cup shaped follower 70 having a conical flange 71 fits within the axial opening 16a' in the follower 16'. The conical flange 71 receives the triangular jaws l9a' and bears against them over a substantial distance, thus restricting their tipping ac-tion if caused to move axially. A split cylindrical ring 72 surrounds the plastic pipe 11' between it and jaws 19a'. This split ring 72 is provided with a radiall~ outwardly extending 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 pipe 11' and jaws l9a' 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.
~ hile certain preferred embodiments and practices of this invention have been illustrated and described in the foregoing specification, it will be understood that this invention may be otherwise embodied within the scope of the following claims.
`' ':. ' ' . ' ' i'' ' ~ . . ' ' .
:. .
Claims (6)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A jaw assembly for use in pipe connectors having a follower member with a frusto-conical opening comprising an elongate ribbon of spaced tri-angular jaws connected by elastomer members.
2. A jaw assembly for use in pipe connectors as claimed in claim 1 wherein the triangular jaws are right triangles.
3. A jaw assembly for use in pipe connectors as claimed in claim 1 wherein the triangular jaws are oblique triangles.
4. An assembly for use in plastic pipe connectors having a follower member with a frusto-conical opening comprising an elongate ribbon of spaced triangular jaws connected by elastomer members, a split cylinder adapted to surround and engage a plastic pipe end to be connected, a cylindrical support sleeve within the plastic pipe end to be connected and stop means on the in-ner and outer surfaces of the split cylinder engaging the triangular jaws and plastic pipe to prevent relative movement.
5. A jaw assembly for use in pipe connectors as claimed in claim 4 wherein the triangular jaws are right triangles.
6. An assembly for use in pipe connectors as claimed in claim 4 or 5 wherein the triangular jaws are provided with annular grooves and the stop means on the split cylinder are corresponding annular grooves.
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 (4)
| 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 |
| CA288,631A CA1069959A (en) | 1976-11-01 | 1977-10-13 | Pipe and tubing connectors |
| CA337,807A CA1078427A (en) | 1976-11-01 | 1979-10-17 | Jaw assembly for pipe connector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1078427A true CA1078427A (en) | 1980-05-27 |
Family
ID=27426030
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA337,807A Expired CA1078427A (en) | 1976-11-01 | 1979-10-17 | Jaw assembly for pipe connector |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1078427A (en) |
-
1979
- 1979-10-17 CA CA337,807A patent/CA1078427A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |