CA2094772A1 - Couplings - Google Patents
CouplingsInfo
- Publication number
- CA2094772A1 CA2094772A1 CA 2094772 CA2094772A CA2094772A1 CA 2094772 A1 CA2094772 A1 CA 2094772A1 CA 2094772 CA2094772 CA 2094772 CA 2094772 A CA2094772 A CA 2094772A CA 2094772 A1 CA2094772 A1 CA 2094772A1
- Authority
- CA
- Canada
- Prior art keywords
- coupling
- retaining means
- elongate member
- manually
- surface formation
- 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.)
- Abandoned
Links
Abstract
Abstract of the Disclosure Couplings for corrugated conduits are known. In the present invention the coupling has a body with a rotatable retaining ring. The ring has inwardly-projecting locking bars with two finger grips which project outwardly through slots in the body. When the finger grips are held and the ring is rotated, the locking bars are displaced inwardly to lie between adjacent corrugations on the conduit and retain it in the coupling.
Description
Background of the Invention This invention relates to couplings The invention is more particularly concerned with couplings for fitting onto corrugated tubing, eonduits or other corrugated members.
There are several different forms of existing couplings which can be fitted ontocorrugated tubing. These malce use of teeth or other surface forrnations that, when pushed :
inwards, engage between corrugations on the tubing ar.d lock it on the coupling. One such :
coupling is described in GB 2123106. This has teeth which are de~ormed inwardly when an outer collar is pushed axially onto the coupling. GB 2125501 describes a similar coupling in which the collar is held in position by means of bayonet fitting. A coupling is also sold by PMA
Elektro A. G. which has a separate U-shape locking piece that is pushed into a slot in the body of the coupling so that it lies betw~en the ~corrugations on the tubing.
~ These previous couplings have the disadvantage that the coupl;ng is locked by putting together~two separate parts. This means that the parts ofthe coupling are separate until locked~
increasing the lisk that parts will become lost either during initial installation or when subsequently removed.
Brief Summary of the Invention It is an object ofthe present invention to provide an improved coupling.
:
According to one aspect of the present invention there is provided a coupl;ng for fitting to an externally corn~gated elongate member, the coupling comprising a body having one end adapted to receive the elongate member and an opposite end provided , 1.., ., ::... .
` . . : . :': . : : : , - - . : ~: !
20~ ~7~
There are several different forms of existing couplings which can be fitted ontocorrugated tubing. These malce use of teeth or other surface forrnations that, when pushed :
inwards, engage between corrugations on the tubing ar.d lock it on the coupling. One such :
coupling is described in GB 2123106. This has teeth which are de~ormed inwardly when an outer collar is pushed axially onto the coupling. GB 2125501 describes a similar coupling in which the collar is held in position by means of bayonet fitting. A coupling is also sold by PMA
Elektro A. G. which has a separate U-shape locking piece that is pushed into a slot in the body of the coupling so that it lies betw~en the ~corrugations on the tubing.
~ These previous couplings have the disadvantage that the coupl;ng is locked by putting together~two separate parts. This means that the parts ofthe coupling are separate until locked~
increasing the lisk that parts will become lost either during initial installation or when subsequently removed.
Brief Summary of the Invention It is an object ofthe present invention to provide an improved coupling.
:
According to one aspect of the present invention there is provided a coupl;ng for fitting to an externally corn~gated elongate member, the coupling comprising a body having one end adapted to receive the elongate member and an opposite end provided , 1.., ., ::... .
` . . : . :': . : : : , - - . : ~: !
20~ ~7~
with coupling means by which the coupling can be connected with a cooperating coupling, and annular retaining means carried by the body at least a part of which is displaceable in a plane transverse to the axis of the elongate member, the retainislg mealns having at least one internally-projecting surface formation and at least one manually-engageable member that projects ~om the body such that by engaging the manually-engageable member and moving it in the said plane the surface formation can be displaced betweçn a first position in which the or each surface formation is loca~ed relatively outwardly to enable entry of the corrugated member into the body and within the retaining means, and a second position in which the or each surface formation is located relatively inwardly to lie between adjacent corrugations on the elongate member and lock it in the body, and the retaining means not being removable fi~m the body while the elongate member is inserted within the body.
The retaining member preferably has two inwardly-projectillg surface formations located diametrically opposite one another which in the second position lie between adjacent corrugations on the elongate member. The retaining means is prefierably of a resilient plastics material~ The retaining member may be a resilient ring with bowed arms, the surface formations being provided on the bowed arms and the surface formations being movable outwardly to the first position to enable entry of the corrugated member by squeezing the two manually engageable members towards one another.
Alternatively, the retaining mernber may be rotatable in the plane. The or each internally-projecting surface formation may be deflected inwardly on rotatation of the retaining member by engagement of cooperating carn surfaces on the retaining member and the body.
The retainin~ member and the body may have cooperating detents arranged to resist rotation of the retaining member to the first position. The retaining member may have two manually-engageable members located opposite one another. The or each manually-engageable member may pro~ect radially outwardly ofthe body through a slot in th wall ofthe body. The retaining member may be located in an internal annular groove in the body.
.. , , . .: , :. . . . - .
. , , . -2~772 The manually-engageable member may be a radially-projecting collar that projects from one end of the body.
A coupling for a corrugated conduit will now be described, by way of exarnple, with reference to the accompanying drawings.
Brief Description of the Drawin s Figure 1 is a perspective view of the coupling;
Figure 2 i5 a sectional side elevation view through the coupling installed on a conduit;
Figure 3 is a sectional view along the line III of Figure 2;
lFigure 4 is a partly sectional side elevation through a modified coupling in its open position;
Figure 5 is a sectional view along the line V-V in a closed position;
Figure 6 is a perspective view of a fiJrther alternative coup]ing;
and Figure 7 is a plan view of the coupling of Figure 6 along the arrow VII before installation on a conduit.
: :
.
, -4- ~9~772 Detailed Description of the Preferred Embodiments With reference first to Figures 1 to 3, the coupling 1 comprises two-parts, namely a body 2 and a retaining ring 3 which is mounted in the body. In use, the coupling I is mounted on the end of a circun~erentially- corrugated conduit 4.
The body 2 is a one-piece plastics moulding of cylindrical shape and generally circular shape, with an ~xial bore 20 ~xtending through it. The lower part 21 of the body 2 has an external diameter of about 20mm and is externally threaded so that the coupling 1 can be screwed into a cooperating coupling (not shown) having a fiemale screw thread. The bore 20 through the lower part 21 of the body is about 15mm in diameter and this opens into a tapered section 22 at the lower end ofthe upper part 23 ofthe body. The tapered section 22 has a diameter of about 1 9mm at its lower end so that an annular shoulder 24 is formed between the tapered section and the lower part of the bore 20. At its upper end, the tapered section 22 has a diameter of about 2 lmrn, the bore 20 continuing for the remainder of the length of the body 2 with this contant diameter. Externally, the upper part 23 of the body is of circular section apart from hexagonal flats 25 formed around its lower end which enables the coupling to be r~tated with a spanner. Close to its upper end, two slots 26 and 27 extend through the wall of the body 2 diametrically opposite one another. The slots 26 and 27 open into an annular groove 28 formed around the inside of the body level with the slots.
The retaining ring 3 is located in the groove 28 and the slots 26 and 27 in the body 2 so that it lies in a plane transverse to the ax~s of the body and the conduit 4. The ring 3 is a one-piece moulding of a hard, resilient plastics material such as nylon. The ring 3 is of generally circular, annular shape with two finger grips 31 and 32 whlch are located diametrically opposite one another and project through the slots 26 and 27 respectively. To the right of the finger grip 31 the ring 3 has a cam surface 34 on its outer edge; a similar cam surface 35 is formed to the le~ of the finger grip 32. The external diameter D1 of the ring 3 is greater between the two ~ 7 7 2 :
camming surfaces 34 and 35 than the diameter D2 shown horizontal in Figure 3. The external edge of the ring 3 is also provided with two detent recesses 36 and 37 located diametrically opposite one another in the region of the camming surfaces 34 and 35. Around its internal edge, the ring 3 has two opposite inwardly-projecting locking bars 38 and 3g which each extend around about 90 degrces of the circumference of the ring in ali~unent with the cam surfaces 34 and 35. The bars 38 and 39 taper in radial height along their length, being highest about midway along where they are about equal to the depth of the recesses between adjacent corrugations on the conduit 4. The bars 38 and 39 are located around the lower edge of t~e ring 3 and are only about one quarter the thickness of the ring. On the underside of both finger grips 31 and 32 there is a small pip 50 which prevents insertion and withdrawal of the ring 3 through the slots 26 and 27 except when the pips are aligned with small grooves 51 - formed at the lower ed8e of ths slots.
On the body 2, there are formed two flat cam surfaces 41 and 42 located diametrically opposite one another, intermediate the slots 26 and 27.
In its fillly open position, the finger grips 31 and 32 are located in an anticlockwise position. In this position3 the camming surfaces 34 and 35 on the ring 3 are located spaced ~om the camming surfaces 41 and 42 on the body 2 and the internal di~rneter ofthe ring between the locking bars 38 and 39 is slightly greater than the maximum external diameter of the conduit 4. The conduit 4 can, therefore, be freely inserted into or withdrawn from the coupling.
VVhen it is desired to push the coupling I onto the end ofthe conduit 4, the installer checks th~t the ring 3 is rotated iùlly anticlockwise to its open, first position and then pushes the conduit as far as it will go into the coupling 1, until its lower end contacts the tapered -6- ~9il77 section 22. The diameter ofthe tapered section 22 is chosen so that, at some point between its ends, it is equal to the maximum diameter ofthe conduit. In this way, the tapered sec~ion 22 forms a seal with the lower end of the conduit 4.
After insertion of the conduit 4, the finger grips 31 and 32 are gripped are rotated clockwise, through the intermediate position shown in Figure 3, as far as they will 8 to a closed, second position. As the ring 3 rotates, the camming surfaces 34 and 35 on the ring move over the camming surfaces 41 and 42 on the body 2 so that the ring is deformed radially inwardly and, more particularly, the locking bars 38 and 39 are deformed inwardly. When fully rotated, to the closed position, locking bars 38 and 39 project inwardly between adjacent corrugations on the conduit 4 and prevent withdrawal of the conduit. In this position, the detent recesses 36 and 37 on the ring 3 snap onto detent projections 46 and 47 on the camming surfaces 41 and 42 so that rotation of the ring back to an open position is resisted. The conduit 4 can subsequently be removed, if necessary, by twisting the ring 3 back to its open position, with sufficient force to overcome the detents 36 and 46 and 37 and 47. When the coupling 1 is mounted on the conduit 4, it can be rotated ~eely on the conduit since the locking bars 38 and 39 ofthe nng 3 can slide around the valley between adjacent corrugations. This enables the coupling 1 to be screwed into a cooperating coupling a~er installation on the conduit 4.
The coupling 1 is preferably supplied with the ring 3 located in position in the body 2.
Although it is possible to pull out the ring 3 before installation, through one of the slots 26 or 27, friction and the pips 50 reduce to a minimum the risk of the ring falling out of the coupling.
A~er installation on the conduit 4, removal ofthe ring 3 is prevented because the conduit is completely encircled by the ring.
The coupling could be used for fitting onto corrugated tubing, cable or any other corrugated elongate member.
.
, , : ,.. ; ,. ,.: : .
. .
2~ 72 Various changes to the coupling are possible such as ilhlstrated in Figures 4 and 5 which show a modified coupling I '~ The body 2' of this coupling is identical to the body 2 shown in Figures 1 to 3 but the retaining ring 3' is of a different cons~ruction. The ring 3i takes the form of a short sleeve 30' ~ith a knurled, radially-projecting collar 31' at one end~ and two spring locking arms 32' and 33' of arcuate shape. The locking arrns are each attached to the sleeve 30' at one end only and have radially inwardly-projecting locking bars 38' and 39' extending around the lower edge of the arms. On their outer surfiace, the arms 32' and 33' have camming surfaces 34' and 35'. When located in the body 2', the collar 31' abuts the end of the body and the locking arms 32' and 33' are located in the groove 28' with tbe resilience of the arms urging the carnrning surfaces 34' and 35' outwardly into contact with the }'loor ofthe groove 28'. Rotation of the ring 3' causes the carnming surfaces 34' and 35' on the arms 32' and 33' to slide over the camming surfaces 44' and 45' on the groove so that the arms are deflected inwardly. This causes the locking bars 38' and 39' to be deformed inwardly into the valleys between corrugations on the conduit. It can be seen that the slots 26' and 27' on the body 2' are not needed in this modification and can be dispensed with if desired.
A fiurther alternative form of coupling 1 " is shown in Figures 6 and 7. In this, the retaining ring 3" is of generally rectangular, annular shape with two outwardly-bowed retaining arms 30" and 31 " linked at opposite ends by lateral finger grips or manually-engageable members 32" and 33". The arms 30" and 31 " extend along a groove 28", with the finger glipS
32" and 33" projecting through slots 26" and 27" respectively. In the normal, relaxed state of the ring 3", th~ finger g~ps 32" and 33" both project outwardly beyond the external surface of the body 2". The external width of the ring 3" across the widest part of the arrns 30" and 31 " is less than the diameter of the groove 28" so that there is clearance between the outside of the rin~g 3" and the bottom ofthe groove. The internal width ofthe ring 3" is chosen to be equal the minimum diameter of the conduit across the valleys of the cornugations. It can b~ seen, 2~9~772 therefore, that the external width ofthe ring 3" is less than the maximum diameter o~the conduit, that is, across the hills of co rrugations. In its relaxed stat~, therefore, as shown, the ring 3" would prevent entry of the end of a conduit into the coupling.
When it is desired to push the coupling 1 " onto the end of a conduit, the installer simply squeezes the ~wo finger grips 32" and 33" irlwardly towards one another against the resilience ofthe ring 3". This causes de~ormation ofthe ring 3" and, more p~rticularly, outward displacement of the arms 30" and 31 " in the plane transverse to the axis of the coupling I " and the eonduit. The arms 3û" and 31 "are distorted away from one anoth¢r out-vardly in the groove 28" until the internal width of the ring 3" exceeds the maximum diameter of the conduit.
The conduit is then pushed as far as it will go into the coupling I ".
A~er insertion o~the conduit 4, the finger grips 32" and 33" are released so that the resilience ofthe ring 3" allows the arms 30" and 31" to move back to their relaxed position where they extend between adjacent comlgations on the conduit and preve~t its remo ~al.
[Y.\PATENTS\SPEC\92\RRC2 .DOC]
', ' . .' .. , ~ ' : , :
The retaining member preferably has two inwardly-projectillg surface formations located diametrically opposite one another which in the second position lie between adjacent corrugations on the elongate member. The retaining means is prefierably of a resilient plastics material~ The retaining member may be a resilient ring with bowed arms, the surface formations being provided on the bowed arms and the surface formations being movable outwardly to the first position to enable entry of the corrugated member by squeezing the two manually engageable members towards one another.
Alternatively, the retaining mernber may be rotatable in the plane. The or each internally-projecting surface formation may be deflected inwardly on rotatation of the retaining member by engagement of cooperating carn surfaces on the retaining member and the body.
The retainin~ member and the body may have cooperating detents arranged to resist rotation of the retaining member to the first position. The retaining member may have two manually-engageable members located opposite one another. The or each manually-engageable member may pro~ect radially outwardly ofthe body through a slot in th wall ofthe body. The retaining member may be located in an internal annular groove in the body.
.. , , . .: , :. . . . - .
. , , . -2~772 The manually-engageable member may be a radially-projecting collar that projects from one end of the body.
A coupling for a corrugated conduit will now be described, by way of exarnple, with reference to the accompanying drawings.
Brief Description of the Drawin s Figure 1 is a perspective view of the coupling;
Figure 2 i5 a sectional side elevation view through the coupling installed on a conduit;
Figure 3 is a sectional view along the line III of Figure 2;
lFigure 4 is a partly sectional side elevation through a modified coupling in its open position;
Figure 5 is a sectional view along the line V-V in a closed position;
Figure 6 is a perspective view of a fiJrther alternative coup]ing;
and Figure 7 is a plan view of the coupling of Figure 6 along the arrow VII before installation on a conduit.
: :
.
, -4- ~9~772 Detailed Description of the Preferred Embodiments With reference first to Figures 1 to 3, the coupling 1 comprises two-parts, namely a body 2 and a retaining ring 3 which is mounted in the body. In use, the coupling I is mounted on the end of a circun~erentially- corrugated conduit 4.
The body 2 is a one-piece plastics moulding of cylindrical shape and generally circular shape, with an ~xial bore 20 ~xtending through it. The lower part 21 of the body 2 has an external diameter of about 20mm and is externally threaded so that the coupling 1 can be screwed into a cooperating coupling (not shown) having a fiemale screw thread. The bore 20 through the lower part 21 of the body is about 15mm in diameter and this opens into a tapered section 22 at the lower end ofthe upper part 23 ofthe body. The tapered section 22 has a diameter of about 1 9mm at its lower end so that an annular shoulder 24 is formed between the tapered section and the lower part of the bore 20. At its upper end, the tapered section 22 has a diameter of about 2 lmrn, the bore 20 continuing for the remainder of the length of the body 2 with this contant diameter. Externally, the upper part 23 of the body is of circular section apart from hexagonal flats 25 formed around its lower end which enables the coupling to be r~tated with a spanner. Close to its upper end, two slots 26 and 27 extend through the wall of the body 2 diametrically opposite one another. The slots 26 and 27 open into an annular groove 28 formed around the inside of the body level with the slots.
The retaining ring 3 is located in the groove 28 and the slots 26 and 27 in the body 2 so that it lies in a plane transverse to the ax~s of the body and the conduit 4. The ring 3 is a one-piece moulding of a hard, resilient plastics material such as nylon. The ring 3 is of generally circular, annular shape with two finger grips 31 and 32 whlch are located diametrically opposite one another and project through the slots 26 and 27 respectively. To the right of the finger grip 31 the ring 3 has a cam surface 34 on its outer edge; a similar cam surface 35 is formed to the le~ of the finger grip 32. The external diameter D1 of the ring 3 is greater between the two ~ 7 7 2 :
camming surfaces 34 and 35 than the diameter D2 shown horizontal in Figure 3. The external edge of the ring 3 is also provided with two detent recesses 36 and 37 located diametrically opposite one another in the region of the camming surfaces 34 and 35. Around its internal edge, the ring 3 has two opposite inwardly-projecting locking bars 38 and 3g which each extend around about 90 degrces of the circumference of the ring in ali~unent with the cam surfaces 34 and 35. The bars 38 and 39 taper in radial height along their length, being highest about midway along where they are about equal to the depth of the recesses between adjacent corrugations on the conduit 4. The bars 38 and 39 are located around the lower edge of t~e ring 3 and are only about one quarter the thickness of the ring. On the underside of both finger grips 31 and 32 there is a small pip 50 which prevents insertion and withdrawal of the ring 3 through the slots 26 and 27 except when the pips are aligned with small grooves 51 - formed at the lower ed8e of ths slots.
On the body 2, there are formed two flat cam surfaces 41 and 42 located diametrically opposite one another, intermediate the slots 26 and 27.
In its fillly open position, the finger grips 31 and 32 are located in an anticlockwise position. In this position3 the camming surfaces 34 and 35 on the ring 3 are located spaced ~om the camming surfaces 41 and 42 on the body 2 and the internal di~rneter ofthe ring between the locking bars 38 and 39 is slightly greater than the maximum external diameter of the conduit 4. The conduit 4 can, therefore, be freely inserted into or withdrawn from the coupling.
VVhen it is desired to push the coupling I onto the end ofthe conduit 4, the installer checks th~t the ring 3 is rotated iùlly anticlockwise to its open, first position and then pushes the conduit as far as it will go into the coupling 1, until its lower end contacts the tapered -6- ~9il77 section 22. The diameter ofthe tapered section 22 is chosen so that, at some point between its ends, it is equal to the maximum diameter ofthe conduit. In this way, the tapered sec~ion 22 forms a seal with the lower end of the conduit 4.
After insertion of the conduit 4, the finger grips 31 and 32 are gripped are rotated clockwise, through the intermediate position shown in Figure 3, as far as they will 8 to a closed, second position. As the ring 3 rotates, the camming surfaces 34 and 35 on the ring move over the camming surfaces 41 and 42 on the body 2 so that the ring is deformed radially inwardly and, more particularly, the locking bars 38 and 39 are deformed inwardly. When fully rotated, to the closed position, locking bars 38 and 39 project inwardly between adjacent corrugations on the conduit 4 and prevent withdrawal of the conduit. In this position, the detent recesses 36 and 37 on the ring 3 snap onto detent projections 46 and 47 on the camming surfaces 41 and 42 so that rotation of the ring back to an open position is resisted. The conduit 4 can subsequently be removed, if necessary, by twisting the ring 3 back to its open position, with sufficient force to overcome the detents 36 and 46 and 37 and 47. When the coupling 1 is mounted on the conduit 4, it can be rotated ~eely on the conduit since the locking bars 38 and 39 ofthe nng 3 can slide around the valley between adjacent corrugations. This enables the coupling 1 to be screwed into a cooperating coupling a~er installation on the conduit 4.
The coupling 1 is preferably supplied with the ring 3 located in position in the body 2.
Although it is possible to pull out the ring 3 before installation, through one of the slots 26 or 27, friction and the pips 50 reduce to a minimum the risk of the ring falling out of the coupling.
A~er installation on the conduit 4, removal ofthe ring 3 is prevented because the conduit is completely encircled by the ring.
The coupling could be used for fitting onto corrugated tubing, cable or any other corrugated elongate member.
.
, , : ,.. ; ,. ,.: : .
. .
2~ 72 Various changes to the coupling are possible such as ilhlstrated in Figures 4 and 5 which show a modified coupling I '~ The body 2' of this coupling is identical to the body 2 shown in Figures 1 to 3 but the retaining ring 3' is of a different cons~ruction. The ring 3i takes the form of a short sleeve 30' ~ith a knurled, radially-projecting collar 31' at one end~ and two spring locking arms 32' and 33' of arcuate shape. The locking arrns are each attached to the sleeve 30' at one end only and have radially inwardly-projecting locking bars 38' and 39' extending around the lower edge of the arms. On their outer surfiace, the arms 32' and 33' have camming surfaces 34' and 35'. When located in the body 2', the collar 31' abuts the end of the body and the locking arms 32' and 33' are located in the groove 28' with tbe resilience of the arms urging the carnrning surfaces 34' and 35' outwardly into contact with the }'loor ofthe groove 28'. Rotation of the ring 3' causes the carnming surfaces 34' and 35' on the arms 32' and 33' to slide over the camming surfaces 44' and 45' on the groove so that the arms are deflected inwardly. This causes the locking bars 38' and 39' to be deformed inwardly into the valleys between corrugations on the conduit. It can be seen that the slots 26' and 27' on the body 2' are not needed in this modification and can be dispensed with if desired.
A fiurther alternative form of coupling 1 " is shown in Figures 6 and 7. In this, the retaining ring 3" is of generally rectangular, annular shape with two outwardly-bowed retaining arms 30" and 31 " linked at opposite ends by lateral finger grips or manually-engageable members 32" and 33". The arms 30" and 31 " extend along a groove 28", with the finger glipS
32" and 33" projecting through slots 26" and 27" respectively. In the normal, relaxed state of the ring 3", th~ finger g~ps 32" and 33" both project outwardly beyond the external surface of the body 2". The external width of the ring 3" across the widest part of the arrns 30" and 31 " is less than the diameter of the groove 28" so that there is clearance between the outside of the rin~g 3" and the bottom ofthe groove. The internal width ofthe ring 3" is chosen to be equal the minimum diameter of the conduit across the valleys of the cornugations. It can b~ seen, 2~9~772 therefore, that the external width ofthe ring 3" is less than the maximum diameter o~the conduit, that is, across the hills of co rrugations. In its relaxed stat~, therefore, as shown, the ring 3" would prevent entry of the end of a conduit into the coupling.
When it is desired to push the coupling 1 " onto the end of a conduit, the installer simply squeezes the ~wo finger grips 32" and 33" irlwardly towards one another against the resilience ofthe ring 3". This causes de~ormation ofthe ring 3" and, more p~rticularly, outward displacement of the arms 30" and 31 " in the plane transverse to the axis of the coupling I " and the eonduit. The arms 3û" and 31 "are distorted away from one anoth¢r out-vardly in the groove 28" until the internal width of the ring 3" exceeds the maximum diameter of the conduit.
The conduit is then pushed as far as it will go into the coupling I ".
A~er insertion o~the conduit 4, the finger grips 32" and 33" are released so that the resilience ofthe ring 3" allows the arms 30" and 31" to move back to their relaxed position where they extend between adjacent comlgations on the conduit and preve~t its remo ~al.
[Y.\PATENTS\SPEC\92\RRC2 .DOC]
', ' . .' .. , ~ ' : , :
Claims (12)
1. A coupling for fitting to an externally corrugated elongate member, the coupling comprising: a body, said body having one end adapted to receive the elongate member and an opposite end provided with coupling means by which the coupling can be connected with a cooperating coupling; and annular retaining means carried by the body at least a part of said annular retaining means being displaceable in a plane transverse to the axis of the elongate member, wherein the retaining means has at least one internally-projecting surface formation and at least one manually-engageable member that projects from the body such that by engaging the manually-engageable member and moving it in the said plane, the surface formation can be displaced between a first position in which the surface formation is located relatively outwardly toenable entry of the corrugated member into the body and within the retaining means, and a second position in which the surface formation is located relatively inwardly to lie between adjacent corrugation on the elongate member and lock it in the body, and wherein the retaining means cannot be removed from the body while the elongate member is inserted within the body.
2. A coupling according to Claim 1, wherein the retaining means has two internally-projecting surface formations located diametrically opposite one another which in the second position lie between adjacent corrugations on the elongate member.
3. A coupling according to Claim 1, wherein the retaining means is a resilient ring with bowed arms, wherein the coupling has a surface formation on each of the bowed arms, and wherein the surface formations are movable outwardly to the first position to enable entry of the corrugated member by squeezing the two manually-engageable members towards one another.
4. A coupling according to Claim 1, wherein the retaining means is rotatable in the plane.
5. A coupling according to Claim 4, wherein the body and the retaining means have cooperating cam surfaces, and wherein the internally-projecting surface formation is deflected inwardly on rotation of the retaining means by engagement of the cooperating cam surfaces on the retaining means and the body.
6. A coupling according to Claim 4 or 5, wherein the retaining means and the body have cooperating detents, and wherein said detents are arranged to resist rotation of the retaining means to the first position.
7. A coupling according to Claim 1, wherein the retaining means has two manually-engageable members located opposite one another.
8. A coupling according to Claim 1, wherein the body has a slot in a wall, and wherein the manually-engageable member projects radially outwardly of the body through the slot.
9. A coupling according to Claim 4, wherein the manually-engageable member is a radially-projecting collar, and wherein the collar projects from one end of the body.
10. A coupling according to Claim 1, wherein the body has an internal annular groove, and wherein the retaining means is located in the groove.
11. A coupling for fitting to an externally corrugated elongate member, the coupling comprising: a body, said body having one end adapted to receive the elongate member and an opposite end provided with coupling means by which the coupling can be connected with a cooperating coupling; and annular retaining means carried by the body, said annular retaining means being rotatable in a plane transverse to the axis of the elongate member, wherein the retaining means has at least at least one manually-engageable member that projects from the body by which the retaining means can be rotated in the said plane, wherein the retaining means and the body have cooperating cam surfaces, and wherein the retaining means has at least one inwardly-projecting surface formation such that when the retaining means is rotated the cam surfaces displace the surface formation between a first position in which the surface formation is located relatively outwardly to enable entry of the corrugated member into the body and within the retaining means, and a second position in which the surface formation is located relatively inwardly tolie between adjacent corrugations on the elongate member and lock it in the body.
12. A coupling for fitting to an externally corrugated elongate member, the coupling comprising: a body, said body having one end adapted to receive the elongate member and an opposite end provided with coupling means by which the coupling can be connected with a cooperating coupling; and annular retaining means carried by the body, at least a part of said annular retaining means being displaceable in a plane transverse to the axis of the elongate member, wherein the retaining means is a resilient ring with bowed arms, said bowed arms each having an inwardly-projecting surface formation, wherein the ring has two manually-engageable members that project from the body such that by squeezing together the manually-engageable members the surface formations on the bowed arms are moved outwardly to a first position to enable entry of the corrugated member into the body, and wherein the resilience of the ring is such that the surface formations move inwardly to a second position where they lie between adjacent corrugations on the elongate member and thereby lock the elongate member in the body when the manually-enageable members are released.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9208994 | 1992-04-25 | ||
| GB929208994A GB9208994D0 (en) | 1992-04-25 | 1992-04-25 | Couplings |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2094772A1 true CA2094772A1 (en) | 1993-10-26 |
Family
ID=10714558
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2094772 Abandoned CA2094772A1 (en) | 1992-04-25 | 1993-04-23 | Couplings |
Country Status (2)
| Country | Link |
|---|---|
| CA (1) | CA2094772A1 (en) |
| GB (1) | GB9208994D0 (en) |
-
1992
- 1992-04-25 GB GB929208994A patent/GB9208994D0/en active Pending
-
1993
- 1993-04-23 CA CA 2094772 patent/CA2094772A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| GB9208994D0 (en) | 1992-06-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5356183A (en) | Coupling with rotating retaining ring having cam surfaces | |
| EP1517075B1 (en) | Connecting assembly | |
| EP1398559B1 (en) | Improvements in or relating to tube couplings | |
| EP1000287B1 (en) | Safety locking coupling assembly | |
| US8783736B2 (en) | Quick connector for faucet | |
| EP2435744B1 (en) | Release tool for a push-fit pipe fitting | |
| EP1359363B1 (en) | Tube coupling | |
| JPH11311385A (en) | Pipe fitting | |
| KR100701099B1 (en) | Connector | |
| US5259650A (en) | Releasable fast-action pipe coupling | |
| EP1024324B1 (en) | Device for mutually coupling the body of a valve element or the like and a connecting element | |
| CA2454234A1 (en) | Connector with snap collar latching | |
| US5028080A (en) | Quick connect coupling | |
| CZ20022789A3 (en) | Rotary shut-off cock for slide-in coupling with angularly displaced connecting neck | |
| EP1882877B1 (en) | Device for quick connection of two components of systems for the distribution of liquids or gases, with high safety against tampering | |
| EP0200339B1 (en) | Pipe couplings | |
| CA2094772A1 (en) | Couplings | |
| EP1433992B1 (en) | Pipe coupling | |
| JPH07231533A (en) | Pipe coupling | |
| WO1990008288A1 (en) | Pipe coupling | |
| EP0877889A1 (en) | Lockable coupling | |
| EP1104865B1 (en) | A connector for corrugated conduits | |
| EP1104866A1 (en) | Connector for corrugated conduits | |
| WO2024052824A1 (en) | Quick connection device for connection between components of liquid or gas distribution systems | |
| WO2012062380A1 (en) | Cap and cap receiving structure for fluid dosage from a storage container |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |