CA1049585A - Rubber hose coupler - Google Patents
Rubber hose couplerInfo
- Publication number
- CA1049585A CA1049585A CA258,844A CA258844A CA1049585A CA 1049585 A CA1049585 A CA 1049585A CA 258844 A CA258844 A CA 258844A CA 1049585 A CA1049585 A CA 1049585A
- Authority
- CA
- Canada
- Prior art keywords
- tubular member
- flange
- face
- hose
- outer tube
- 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 That Cut Off Fluids, And Hose Joints (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A rubber hose connector having an inner tube inserted into and projecting beyond the end of the hose, a first flange projecting radially outwardly from the inner tube to limit its insertion in the hose, an outer tube fitting slipped over the first flange and crimped onto the end of the hose and a second flange extending radially inwardly from the outer tube and abutting the side of the first flange remote from the hose to prevent removal of the hose.
A rubber hose connector having an inner tube inserted into and projecting beyond the end of the hose, a first flange projecting radially outwardly from the inner tube to limit its insertion in the hose, an outer tube fitting slipped over the first flange and crimped onto the end of the hose and a second flange extending radially inwardly from the outer tube and abutting the side of the first flange remote from the hose to prevent removal of the hose.
Description
104~i3SI515 The present device relates to a connector for a rubber hose.
In the accompanying drawings: -Fig. 1 is a partial sectional view showing a convention-al connector for a rubber hose~
Fig. 2 is a partial sectional view showing an embodiment of a rubber hose connector of the present invention connected to a compression coupling, Fig. 3 is a sectional view showing a compression sleeve for use in the compression coupling shown in Fig. 2, Fig. 4 is an end view from the right hand side of the compression sleeve shown in Fig. 3, Fig. 5 is a partially sectioned view of an alternative compression sleeve for use in the compression coupling shown in Fig. 2, Fig. 6 is an end view from the left-hand side of the sleeve shown in Fig. 5 and Fig. 7 is a sectional view showing a rubber hose -assembled to a connector of the invention which in turn is connected to a compression coupling. '`
A known connector for a rubber hose is shown in Fig. 1.
In this conventional connector, an inner tube 27 is formed inte-grally with a tubular member 23 having a nut portion 25 extending radially outwardly and axially dividing the outer circumferential face of a tubular member 23 in two parts. A screw thread 29 `~
is formed on the part to the right of the nut portion 25 (as viewed) and an annular groove 31 is formed onthe other part.
A conical outwardly flared seat 33 is formed at the end of the inner surface of the tubular member 23 on the same side of the nut portion25 as the annular groove 31. An outer tube 39 has a screw thread 35 which is screwed onto the thread 29, the tube 39 defining together with the inner tube 27 an annular space 37 -:, ~ , , ~49~iB~ ~
for receivlng a hose. A coupling 49 comprises a conically taperéd face 41 at one end thereof, which face 41 is in sealing contact with the seat face 33 of the tubular member 23. A nut portion 43 divides the coupling 49 axially into two substantially equal parts formed respectively with screw threads 45 and 47. A clamping nut 51 is thxeaded at one end onto the screw thread 45 and has at its other end an inwardly extending flange 53 which engages in the annular groove 31 to urge the conical surfaces into sealing con-tact with one another.
The structure of the conventional hose connector is ~-complicated and therefore expensive to manufacture. Furthermore, ` since the inner tube 27 is connected with the outer tube 39 by means of screw threads, which can be stripped and slip on one another with wear, the pressure resistance is inadeqùate.
In the conventional hose connector, since sealing is effected by urging together tapered faces, should either of these faces be damaged prior to assembling or should a foreign body be ., .~ -.
~- ~interposed between the faces, then seal:ing becomes difficult if `-not impossible.
Finally, in the case of the described conventional `
- connector, it is desired to use the associated coupling with a pipe instead of a hose then this is not possible and the complete co~pling must be changed. Therefore, the adaptability of the coupling used with a conventional connector is limited.
With a view to mitigating at least some of the foregoing ;.~ disadvantages, there is provided in accordance with the present invention a connecting apparatus compr1sing a rubber hose connector and a compression coupling wherein said rubber hose connector comprising, a tubular member including an outwardly -extending first flange for axially dividing an outer surface thereof into a first face having same diameter over the whole len~ and a second face, and an outer tube having an inner diameter :,
In the accompanying drawings: -Fig. 1 is a partial sectional view showing a convention-al connector for a rubber hose~
Fig. 2 is a partial sectional view showing an embodiment of a rubber hose connector of the present invention connected to a compression coupling, Fig. 3 is a sectional view showing a compression sleeve for use in the compression coupling shown in Fig. 2, Fig. 4 is an end view from the right hand side of the compression sleeve shown in Fig. 3, Fig. 5 is a partially sectioned view of an alternative compression sleeve for use in the compression coupling shown in Fig. 2, Fig. 6 is an end view from the left-hand side of the sleeve shown in Fig. 5 and Fig. 7 is a sectional view showing a rubber hose -assembled to a connector of the invention which in turn is connected to a compression coupling. '`
A known connector for a rubber hose is shown in Fig. 1.
In this conventional connector, an inner tube 27 is formed inte-grally with a tubular member 23 having a nut portion 25 extending radially outwardly and axially dividing the outer circumferential face of a tubular member 23 in two parts. A screw thread 29 `~
is formed on the part to the right of the nut portion 25 (as viewed) and an annular groove 31 is formed onthe other part.
A conical outwardly flared seat 33 is formed at the end of the inner surface of the tubular member 23 on the same side of the nut portion25 as the annular groove 31. An outer tube 39 has a screw thread 35 which is screwed onto the thread 29, the tube 39 defining together with the inner tube 27 an annular space 37 -:, ~ , , ~49~iB~ ~
for receivlng a hose. A coupling 49 comprises a conically taperéd face 41 at one end thereof, which face 41 is in sealing contact with the seat face 33 of the tubular member 23. A nut portion 43 divides the coupling 49 axially into two substantially equal parts formed respectively with screw threads 45 and 47. A clamping nut 51 is thxeaded at one end onto the screw thread 45 and has at its other end an inwardly extending flange 53 which engages in the annular groove 31 to urge the conical surfaces into sealing con-tact with one another.
The structure of the conventional hose connector is ~-complicated and therefore expensive to manufacture. Furthermore, ` since the inner tube 27 is connected with the outer tube 39 by means of screw threads, which can be stripped and slip on one another with wear, the pressure resistance is inadeqùate.
In the conventional hose connector, since sealing is effected by urging together tapered faces, should either of these faces be damaged prior to assembling or should a foreign body be ., .~ -.
~- ~interposed between the faces, then seal:ing becomes difficult if `-not impossible.
Finally, in the case of the described conventional `
- connector, it is desired to use the associated coupling with a pipe instead of a hose then this is not possible and the complete co~pling must be changed. Therefore, the adaptability of the coupling used with a conventional connector is limited.
With a view to mitigating at least some of the foregoing ;.~ disadvantages, there is provided in accordance with the present invention a connecting apparatus compr1sing a rubber hose connector and a compression coupling wherein said rubber hose connector comprising, a tubular member including an outwardly -extending first flange for axially dividing an outer surface thereof into a first face having same diameter over the whole len~ and a second face, and an outer tube having an inner diameter :,
- 2 - ~-~'' ' ~ , .
;.
:, . . , . : . : :-4g5~5 ,:
larger than said first flange of said tubular member, said outer tube member including a second flange having an inner diameter slightly larger than said first face for engaging said first flange r and for preventing axial movement in a longitudinal direction, said second face of said tubular member and an inner circumferen- . :
tial face of said outer tube defining an annular hose-inserting space therebetween for engaging said hose to be coupled by sliding ;' said outer tube over said tubular member, and said compression r coupling comprising, a coupling body having an inner diameter slightly larger than said first face for encompassing an end of said tubular member and for providing an annular groove adjacent Yi said tubular member, sleeve member for encompassing and gripping ~ .
said tubular member, said sleeve member comprising an encompassing portion for providing a clearance fit into said annular groove in :.
response to radial pressure, said gripping portion comprising at 1 least two first tubular member supporting sections having teeth engageable with said cylindrical body member, said supporting sections separated by notches and connected to said encompassing portion by a thin section means for reduclng radial stiffness of said gripping portion, packing means for providing a seal when compressed in said annular groove between said body member and said sleeve member, and a clamping nut for controllably providing ~
axial pressure f.or said encompassing portion of said sleeve member 1:
and for providing radial pressure for said gripping portion of .. said sleeve member.
The invention will now be described further, by way.of r example, with reference to Figs. 2 to 7 of the accompanying .`
drawings.
Referring now to Fig. 2, in order to provide an inner tube 9, a radially outwardly extending flange 7 is formed on the radially outer surface of a tubular member 1 and divides the outer ':
' .
- ~49S~3S
surface of the tubular member 1 into a.,second section first desig- !
nated 3 and 5, respectively. The section 5 of the inner tube is to be inserted into the end of the hose.
An outer tube 17 for surrounding the same end of the ¦ ~;
hose, is composed of a cylindrical portion 11 having an inner .
diameter larger than the outer diameter of the flange 7 and having an annular flange 15 extending radially inwardly, the diameter l :
of the opening 13 in the flange 15 being smaller than the outer r diameter of the flange 7 but greater than the outer diameter of the tubular member 1. i :-The outer tube 17 is slipped over the first section 3 of the inner tube 9 until the flange 7 abuts the flange 15, and a ~ :
space 19 for receiving the end of the rubber hose is thus defined 1~ .
between the two tubes. '~ ..
An improved grip by the connector on the rubber hose can be achieved by forming a plurality of annular tooth portions 55 , t ~:
'~ .
. . .
- 3a -', ..
1049S~S
on the inner surface of the cylindrlcal portionll and a plurality of arcuate grooves 57 on the outer surface of the section 5.
In general, the rubber hose connector having the above-mentioned structure is used in combination with a compression coupling 21 as shown in the drawings.
The compression coupling 21 will now be described in detail.
The compression coupling 21 comprises a coupling body 67 of tubular cylindrical form having external screw threads 59 and 61 at its opposite end, separated by a nut portion 63 arranged substantiàlly at the axial center. An annular recess 65 is formed at the end of the inner hose of the body 67. A
clamping nut 71, having a radially inwardly extending flange 69, engages the screw thread 61 on the same side of the nut portion 63 as the recess 65. A compression sleeve 73 is arranged radially within the clamping nut 71 to grip the tubular member 1. An elastic packing 81, such as an O-ring or a square section ring, is arranged in an annular space 79 defined by the recess 65, an end face 77 of an annular portion 75 projecting from the adjacent end of the compression sleeve 73 and the outer surface of the tubular member 1. The radially inner surface of the flange 69 is in the form of an inwardly flared conical face 83andwhen the clamping nut 71 is tightenèd, the flange 69 co-operative with a taperlngsurface of the sleeve 73 such as to compress the sleeve 73 in both a radial and an axial direction.
Referring to Figs. 3 and 4, in the compression sleeve 73, a thin portion 89is produced by forming opposed first and second annular grooves 85 and 87 on the outer and inner surfaces of the sleeve respectively. A pipe gripping portion 91 extends axially from the portion 89 of reduced thickness and, its outer surface is conically tapered in a manner complementary to the conical face 83. On the inner surface of the pipe gripping portion 91, there ~L~45~5~S
are formed sharp teeth 97 defined by a plurality of continuous annular grooves 95 of arcuate section. At least 3 slots 101 (4 slots are present in the embodiment shown in the Figs. 3 & 4) are formed on the pipe gripping portion 91, the slots 101 extending axially fromthe end face 99 of the sleeve 73 to the vicinity of the portion 89 of reduced thickness. The annular portion 75 projecting from the left (as viewed) has an outer diameter a little smaller than the inner diameter of the recess 65. When the coupling body 67 and the clamping nut 71 are tightened together, this annular portion 75 moves along the recess 65 toward the left in Fig. 2 so as to compress the packing 81.
The compression sleeve 73 may alternatively have a structure as shown in Figs. 5 and 6.
~eferring to Figs. 5 and 6, in the compression sleeve 73, a portion 89 of reduced thickness is produced by forming an annular groove 85 on the outer circumferential face at a position adjacent to the axially projecting annular portion 75. A pipe gripping portion 91 extends axially from this portion 89 and its outer surface is tapered in a manner complementary to this taper a second inclined face 93 coinciding with said face 83. On the inner surface of the pipe gripping portion 91, there are formed sharp teeth 97 defined by a plurality of continuous annular grooves 95 of arcuate section. Slots 101 (2 slots are present in the embodiment shown in Figs. 5 & 6) are formed in the pipe gripping portion 91, the slots 101 extending axially from the end face 99 to the vicinity of the portion 89 of reduced thickness. A
.
circumferentially extending slot 103 connected to the slot 101 is formed in the portion 80 of reduced thickness. The annular portion 75 has an outer diameter a little smaller than the inner diameter of the recess 65. When the coupling body 67 and the -clamping nut 71 are tightened, this annular portion 75 moves in the recess 65 to thereby compress the packing 81. ~
: , ~.
'" ~: ~' 10~958S
Fig. 7 illustrates the assembled state where the connector is fitted to the end of a rubber hose 105 and is connected to a compression coupling. The end of the rubber hose 105 is sandwiched in the space 19, between the inner and -~
outer tubes of the connector and the outer tube is crimped -to effect a tight grip.
By virtue of the above-mentioned structure, various advantages such as set out below can be attained by the connector of the invention.
Since the outer tube 17 is connected to the tubular member 1 by abutment between the flange 7 with the flange 15 rather than screw threads, the pressure resistance is improved considerably over the conventional connection shown in Fig. 1.
The structure of the hose connector as a whole is also signifi-cantly simplified. -Secondly, when the compression coupling 21 is used in combination with the connector there is no longer a need to take steps to ensure a good seal between mating conical surfaces, thereby simplifying the process of connection should it be required to replace the hose by a rigid pipe, the same compres-sion coupling can be used without modification.
, ~ . . .
, . . . , . . : , :
;.
:, . . , . : . : :-4g5~5 ,:
larger than said first flange of said tubular member, said outer tube member including a second flange having an inner diameter slightly larger than said first face for engaging said first flange r and for preventing axial movement in a longitudinal direction, said second face of said tubular member and an inner circumferen- . :
tial face of said outer tube defining an annular hose-inserting space therebetween for engaging said hose to be coupled by sliding ;' said outer tube over said tubular member, and said compression r coupling comprising, a coupling body having an inner diameter slightly larger than said first face for encompassing an end of said tubular member and for providing an annular groove adjacent Yi said tubular member, sleeve member for encompassing and gripping ~ .
said tubular member, said sleeve member comprising an encompassing portion for providing a clearance fit into said annular groove in :.
response to radial pressure, said gripping portion comprising at 1 least two first tubular member supporting sections having teeth engageable with said cylindrical body member, said supporting sections separated by notches and connected to said encompassing portion by a thin section means for reduclng radial stiffness of said gripping portion, packing means for providing a seal when compressed in said annular groove between said body member and said sleeve member, and a clamping nut for controllably providing ~
axial pressure f.or said encompassing portion of said sleeve member 1:
and for providing radial pressure for said gripping portion of .. said sleeve member.
The invention will now be described further, by way.of r example, with reference to Figs. 2 to 7 of the accompanying .`
drawings.
Referring now to Fig. 2, in order to provide an inner tube 9, a radially outwardly extending flange 7 is formed on the radially outer surface of a tubular member 1 and divides the outer ':
' .
- ~49S~3S
surface of the tubular member 1 into a.,second section first desig- !
nated 3 and 5, respectively. The section 5 of the inner tube is to be inserted into the end of the hose.
An outer tube 17 for surrounding the same end of the ¦ ~;
hose, is composed of a cylindrical portion 11 having an inner .
diameter larger than the outer diameter of the flange 7 and having an annular flange 15 extending radially inwardly, the diameter l :
of the opening 13 in the flange 15 being smaller than the outer r diameter of the flange 7 but greater than the outer diameter of the tubular member 1. i :-The outer tube 17 is slipped over the first section 3 of the inner tube 9 until the flange 7 abuts the flange 15, and a ~ :
space 19 for receiving the end of the rubber hose is thus defined 1~ .
between the two tubes. '~ ..
An improved grip by the connector on the rubber hose can be achieved by forming a plurality of annular tooth portions 55 , t ~:
'~ .
. . .
- 3a -', ..
1049S~S
on the inner surface of the cylindrlcal portionll and a plurality of arcuate grooves 57 on the outer surface of the section 5.
In general, the rubber hose connector having the above-mentioned structure is used in combination with a compression coupling 21 as shown in the drawings.
The compression coupling 21 will now be described in detail.
The compression coupling 21 comprises a coupling body 67 of tubular cylindrical form having external screw threads 59 and 61 at its opposite end, separated by a nut portion 63 arranged substantiàlly at the axial center. An annular recess 65 is formed at the end of the inner hose of the body 67. A
clamping nut 71, having a radially inwardly extending flange 69, engages the screw thread 61 on the same side of the nut portion 63 as the recess 65. A compression sleeve 73 is arranged radially within the clamping nut 71 to grip the tubular member 1. An elastic packing 81, such as an O-ring or a square section ring, is arranged in an annular space 79 defined by the recess 65, an end face 77 of an annular portion 75 projecting from the adjacent end of the compression sleeve 73 and the outer surface of the tubular member 1. The radially inner surface of the flange 69 is in the form of an inwardly flared conical face 83andwhen the clamping nut 71 is tightenèd, the flange 69 co-operative with a taperlngsurface of the sleeve 73 such as to compress the sleeve 73 in both a radial and an axial direction.
Referring to Figs. 3 and 4, in the compression sleeve 73, a thin portion 89is produced by forming opposed first and second annular grooves 85 and 87 on the outer and inner surfaces of the sleeve respectively. A pipe gripping portion 91 extends axially from the portion 89 of reduced thickness and, its outer surface is conically tapered in a manner complementary to the conical face 83. On the inner surface of the pipe gripping portion 91, there ~L~45~5~S
are formed sharp teeth 97 defined by a plurality of continuous annular grooves 95 of arcuate section. At least 3 slots 101 (4 slots are present in the embodiment shown in the Figs. 3 & 4) are formed on the pipe gripping portion 91, the slots 101 extending axially fromthe end face 99 of the sleeve 73 to the vicinity of the portion 89 of reduced thickness. The annular portion 75 projecting from the left (as viewed) has an outer diameter a little smaller than the inner diameter of the recess 65. When the coupling body 67 and the clamping nut 71 are tightened together, this annular portion 75 moves along the recess 65 toward the left in Fig. 2 so as to compress the packing 81.
The compression sleeve 73 may alternatively have a structure as shown in Figs. 5 and 6.
~eferring to Figs. 5 and 6, in the compression sleeve 73, a portion 89 of reduced thickness is produced by forming an annular groove 85 on the outer circumferential face at a position adjacent to the axially projecting annular portion 75. A pipe gripping portion 91 extends axially from this portion 89 and its outer surface is tapered in a manner complementary to this taper a second inclined face 93 coinciding with said face 83. On the inner surface of the pipe gripping portion 91, there are formed sharp teeth 97 defined by a plurality of continuous annular grooves 95 of arcuate section. Slots 101 (2 slots are present in the embodiment shown in Figs. 5 & 6) are formed in the pipe gripping portion 91, the slots 101 extending axially from the end face 99 to the vicinity of the portion 89 of reduced thickness. A
.
circumferentially extending slot 103 connected to the slot 101 is formed in the portion 80 of reduced thickness. The annular portion 75 has an outer diameter a little smaller than the inner diameter of the recess 65. When the coupling body 67 and the -clamping nut 71 are tightened, this annular portion 75 moves in the recess 65 to thereby compress the packing 81. ~
: , ~.
'" ~: ~' 10~958S
Fig. 7 illustrates the assembled state where the connector is fitted to the end of a rubber hose 105 and is connected to a compression coupling. The end of the rubber hose 105 is sandwiched in the space 19, between the inner and -~
outer tubes of the connector and the outer tube is crimped -to effect a tight grip.
By virtue of the above-mentioned structure, various advantages such as set out below can be attained by the connector of the invention.
Since the outer tube 17 is connected to the tubular member 1 by abutment between the flange 7 with the flange 15 rather than screw threads, the pressure resistance is improved considerably over the conventional connection shown in Fig. 1.
The structure of the hose connector as a whole is also signifi-cantly simplified. -Secondly, when the compression coupling 21 is used in combination with the connector there is no longer a need to take steps to ensure a good seal between mating conical surfaces, thereby simplifying the process of connection should it be required to replace the hose by a rigid pipe, the same compres-sion coupling can be used without modification.
, ~ . . .
, . . . , . . : , :
Claims
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A connecting apparatus comprising a rubber hose connector and a compression coupling wherein said rubber hose connector comprising a tubular member including an outwardly extending first flange for axially dividing an outer surface thereof into a first face having same diameter over the whole length and a second face, and an outer tube having an inner diameter larger than said first flange of said tubular member, said outer tube member including a second flange having an inner diameter slightly larger than said first face for engaging said first flange and for preventing axial movement in a longitudinal direction, said second face of said tubular member and an inner circumferential face of said outer tube defining an annular hose-inserting space therebetween for engaging said hose to be coupled by sliding said outer tube over said tubular member, and said compression coupling comprising, a coupling body having an inner diameter slightly larger than said first face for encompass-ing an end of said tubular member and for providing an annular groove adjacent said tubular member, sleeve member for encompass-ing and gripping said tubular member, said sleeve member comprising an encompassing portion for providing a clearance fit into said annular groove in response to radial pressure, said gripping portion comprising at least two first tubular member supporting sections having teeth engageable with said cylindrical body member, said supporting sections separated by notches and connected to said encompassing portion by a thin section means for reducing radial stiffness of said gripping portion, packing means for providing a seal when compressed in said annular groove between said body member and said sleeve member, and a clamping nut for controllably providing axial pressure for said encompassing portion of said sleeve member and for providing radial pressure for said gripping portion of said sleeve member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA258,844A CA1049585A (en) | 1976-08-10 | 1976-08-10 | Rubber hose coupler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA258,844A CA1049585A (en) | 1976-08-10 | 1976-08-10 | Rubber hose coupler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1049585A true CA1049585A (en) | 1979-02-27 |
Family
ID=4106627
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA258,844A Expired CA1049585A (en) | 1976-08-10 | 1976-08-10 | Rubber hose coupler |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1049585A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4466640A (en) * | 1981-08-05 | 1984-08-21 | Dresser Industries, Inc. | Pullout resistant pipe coupling |
-
1976
- 1976-08-10 CA CA258,844A patent/CA1049585A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4466640A (en) * | 1981-08-05 | 1984-08-21 | Dresser Industries, Inc. | Pullout resistant pipe coupling |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3077817B2 (en) | Joint for outer surface engagement of resin pipe | |
| CA2130777C (en) | Mechanical pipe joint | |
| JP4145123B2 (en) | Fitting | |
| EP0545410B1 (en) | Sealing quick-coupling device for unbraided flexible metal tubes | |
| US3423109A (en) | Hose fitting | |
| EP0418961B1 (en) | Pipe coupling | |
| TW351745B (en) | Resin pipe connector | |
| KR840001688A (en) | Pipe connector | |
| US6523864B1 (en) | Connector | |
| US4606565A (en) | Pipe couplings | |
| JPH11141758A (en) | Pipe joint for joining metal sleeve to end part of metal pipe by cold press molding and method for forming its pipe joint | |
| US4296954A (en) | Pipe coupling and pipe joint connection | |
| GB2121133A (en) | Pipe couplings | |
| US3971577A (en) | Union device for flexible tubing | |
| CA1049585A (en) | Rubber hose coupler | |
| EP1350051B1 (en) | Coupling body for polymeric pipes including a pipe abutment surface | |
| US6000729A (en) | Hose coupling | |
| GB2071799A (en) | Pipe couplings | |
| EP0694724B1 (en) | A coupling for the rapid connection of tubes of plastics material | |
| JPH08135862A (en) | Pipe joining device and extensible/contractible pipe coupling | |
| JPH10122466A (en) | Earthquake resistant structure of pipe joint | |
| JP3041477B2 (en) | Pipe connection device | |
| CA1077084A (en) | Pipe coupling | |
| GB2234306A (en) | Pipe fittings | |
| EP0879981B1 (en) | Improved method of manufacturing a rotary coupling for the hermetic connection of corrugated flexible metal hoses |