GB2223287A - Corrugated plastic pipe connector - Google Patents

Corrugated plastic pipe connector Download PDF

Info

Publication number
GB2223287A
GB2223287A GB8924271A GB8924271A GB2223287A GB 2223287 A GB2223287 A GB 2223287A GB 8924271 A GB8924271 A GB 8924271A GB 8924271 A GB8924271 A GB 8924271A GB 2223287 A GB2223287 A GB 2223287A
Authority
GB
United Kingdom
Prior art keywords
bore
conduit
liquid tight
open end
connector
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.)
Granted
Application number
GB8924271A
Other versions
GB2223287B (en
GB8924271D0 (en
Inventor
John Petty
Sandy Mcneil
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Elconnex Pty Ltd
Original Assignee
Elconnex Pty Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Elconnex Pty Ltd filed Critical Elconnex Pty Ltd
Priority to GB8924271A priority Critical patent/GB2223287B/en
Priority claimed from GB8723270A external-priority patent/GB2194609B/en
Publication of GB8924271D0 publication Critical patent/GB8924271D0/en
Publication of GB2223287A publication Critical patent/GB2223287A/en
Application granted granted Critical
Publication of GB2223287B publication Critical patent/GB2223287B/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • F16L25/00—Constructive types of pipe joints not provided for in groups F16L13/00 - F16L23/00 ; Details of pipe joints not otherwise provided for, e.g. electrically conducting or insulating means
    • F16L25/0036—Joints for corrugated pipes
    • F16L25/0045—Joints for corrugated pipes of the quick-acting type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/0033—Moulds or cores; Details thereof or accessories therefor constructed for making articles provided with holes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/44—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles
    • B29C33/48—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles with means for collapsing or disassembling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C37/00—Component parts, details, accessories or auxiliary operations, not covered by group B29C33/00 or B29C35/00
    • B29C37/0003—Discharging moulded articles from the mould
    • B29C37/0014—Discharging moulded articles from the mould by flexibly or permanently deforming undercut portions of the articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/40—Removing or ejecting moulded articles
    • B29C45/44—Removing or ejecting moulded articles for undercut articles
    • B29C45/4407—Removing or ejecting moulded articles for undercut articles by flexible movement of undercut portions of the articles
    • 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
    • F16L37/00—Couplings of the quick-acting type
    • F16L37/08—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members
    • F16L37/084—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking
    • F16L37/098—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking by means of flexible hooks
    • F16L37/0985—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking by means of flexible hooks the flexible hook extending radially inwardly from an outer part and engaging a bead, recess or the like on an inner part

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Quick-Acting Or Multi-Walled Pipe Joints (AREA)

Abstract

A corrugated plastic pipe connector has an open end (3) receiving a conduit which seals in a liquid-tight manner in a tapered section (6) of the bore (5) of the connector. Locking means in the form of resilient fingers (9) co-operate with the corrugations of the conduit. <IMAGE>

Description

Corrugated Plastic Pipe Connector The present invention relates to a liquid tight connector for corrugated piping or conduit.
With existing corrugated flexible conduit for drainage or electrical work, the only available methods of joining involves encasing the joint and gluing to ensure an adequate join. This type of joint must be left, so that the glue or adhesive sets, to ensure a successful join. This takes the tradesman additional time, and the chemistry of the glue weakens the conduit and the connector cannot be reused.
The present invention seeks to ameliorate this problem by providing a push-on connector which provides a liquid tight seal without the aid of adhesives, and which is reusable and adjustable during installation.
In one broad form the invention provides a once-piece liquid tight plastics connector, for affixing, in a liquid tight manner, to a conduit, having a ridge located adjacent to its end, comprising: a body open at one end (3) to receive the conduit in a bore (5) communicating with said open end (3); sealing means (6), in said bore (5), remote from said open end (3), which are adapted to seal against, in a liquid tight manner, the conduit pushed into the said bore (5); and locking means (9) located in said body so as to project into the said bore (5) so as to lock onto the ridge of conduit in said bore, so as to hold in said bore (5) said conduit in a liquid tight seal against the said sealing means (6), characterised in that said locking means (9) comprises an axially extending resilient finger, having a projection (10) located at or adjacent its free end, remote from said open end (3) of said bore (8), and which projects into the bore (5); said sealing means comprises a tapered section (6) of said bore whereby said conduit which is pushed into said bore is compressed against and seals against the tapered section (6) in a liquid tight manner.
The connector of the present invention can be utilised with any form of fittings, such as elbows, junctions, Y and T pieces, terminators, junction boxes, or fittings joining corrugated piping to rigid piping or corrugated piping to corrugated piping.
The present invention will now be described by way of example with reference to the accompanying drawings in which: Figure 1 illustrates a perspective view of a connector according to an embodiment of the present invention; Figure 2 illustrates a sectional view of the connector illustrated in Figure 1 with a corrugated conduit connected therein; and Figures 3a, 3b and 3c are part sectional views illustrating steps in the moulding of the locking means of the embodiment shown in Figure 1.
One embodiment of the present invention is illustrated in Figures 1 to 3 of the accompanying drawings. The connector (1) comprises a housing (2) having an open end (3) for insertion of the corrugated piping to effect connection thereto. The other end (4) is shown for threaded connection to a junction box or the like. However, this end could be designed for any type of connection or fitting. The bore (5) is chosen so as to be slightly oversize to the outer diameter of the corrugated flexible tubing.
The bore (5) as shown in Figure 2 has a tapered section (6) located, remote from the end (3) and terminating in an annular shoulder (7), with a smaller diameter bore (8), in communication therewith. The shoulder could be of any desirable width.
Located intermediate the ends of the bore, in the constant diameter section, are two resilient locking members on axially extending resilient pumps (9) formed in the walls of said bore (5), and having projections 10 which extend into the bore (5).
Thus, in clamping the connector (1) to a corrugated flexible piping as shown in Figure 2, the piping is pushed into the bore (5); the projection (10) being so shaped that the corrugations bear on the ramp (11) and force projections (10) back out of the bore. The piping is then pushed into the tapered section (6) where it may abut against the annular shoulder (7). As the piping is forced further into the tapered section (6), the piping is compressed by the increasingly narrowing diameter of the tapered section, to form a liquid tight seal therewith. The projections (10) lock into a valley of the corrugations of the piping, such that the face (12) of the projection abuts up against a ridge of the corrugations, to prevent the piping from being withdrawn from the bore (5); the ridges being in a liquid tight seal against the walls of the tapered section.
In another embodiment of the invention a resilient seal (27) (shown in Figure 2) could be utilized as well as the tapered section described before.
To assist in the working of the locking members (9), there is a recess (13) as shown in Figures 1 and 2 which produces a thin walled section joining the locking members to the connector. This greatly increases the resilience of the locking member, such that if the conduit is attempted to be removed, the force of the corrugations on the face (12) produces a bending moment on the locking member, drawing the projection (10) deeper into the valley of the conduit, to prevent withdrawal of the conduit from the connector.
With the above described locking means, the corrugated piping may be released by means of a suitable tool inserted in the opening (14), to force the projections out of the bore (5).
The present invention may be made from any suitable plastics such as PVC or nylon, polypropolene, ABS, and can be used with pipes of varying sizes, for example, flexible plastic corrugated electrical conduit. The connector, as described above, can be utilised to form any desired connector, and could have any desired number of locking means as required.
The connector of the present invention could be. moulded to a wall or a portion of a junction box, which wall or portion is releasably held in liquid tight relationship with the junction box, i.e. a groove and mating projection, or be able to be connected to a recess in a junction box by any suitable means, such as tapered swaged fit.
Because the connector in the preferred embodiment is a unitary plastics moulding, a special method of moulding had to be developed to allow for the formation of the locking means (9).
This method will now be described by way of example with reference to Figures 3a, 3b and 3c, which shows a part sectional view of one embodiment of the connector in the area of the locking member during moulding.
The external mould (15) comprises a moving core (16) which forms the U-shaped cut-out (17), as shown in Figure 1.
This projection mates with a recess in the internal mandrel or core pin (19), as shown in Figure 3a, to form the locking member or finger (9).
In profile as shown in Figure 3a, the projection (10) extends into the bore (5) beyond the wall thickness (21), with the ramp (11) tapering back beyond the wall thickness, and rising again to the apex (22) at the level of the wall thickness (21), where it forms a ramp (25) which slopes to the recess (13).
When the material of the thus moulded connector has sufficiently solidified, the external mould (15) and its projection (16) are withdrawn as shown in Figure 3b and the core pin (19) is withdrawn in the direction of the arrow (28).
As the core pin (19) is withdrawn the ridge (23) as it bears on the ramp (24) forces the locking member outwardly from the bore (5), such that when the ridge (23) of the core pin (19) bears on the apex (22), the projection (10) is well clear of the core pin (19). Engagement of the ridge (23) with the slope (25) of the locking member as shown in Figure 3c prevents the projection (10) from interfering with the core pin (19) as it is'removed from the bore (5). This thereby ensures that the locking edge (26) of the projection (10) is not damaged by the core pin (19).
It shall be obvious to people skilled in the art that the present invention could be used with corrugated conduit of any profile or could be used with non corrugated pipes having a ridge running around the pipe at a suitable distance from the end. The connector has applications for connection of electrical insulation piping, pool filtration and vacuum connections, vacuum cleaners, irrigation corrugated piping and lawn mower cable protection.

Claims (4)

Claims
1. A once-piece liquid tight plastics connector, for affixing, in a liquid tight manner, to a conduit, having a ridge located adjacent to its end, comprising: a a body open at one end (3) to receive the conduit in a bore (5) communicating with said open end (3); sealing means (6), in said bore (5), remote from said open end (3), which are adapted to seal against, in a liquid tight manner, the conduit pushed into the said bore (5); and locking means (9) located in said body so as to project into the said bore (5) so as to lock onto the ridge of conduit in said bore, so as to hold in said bore (5) said conduit in a liquid tight seal against the said sealing means (6), characterised in that said locking means (9) comprises an axially extending resilient finger, having a projection (10) located at or adjacent its free end, remote from said open end (3) of said bore (8), and which projects into the bore (5); said sealing means comprises a tapered section (6) of said bore whereby said conduit which is pushed into said bore is compressed against and seals against the tapered section (6) in a liquid tight manner.
2. A liquid tight connector according to claim 1 wherein said projection (10) has a substantially planar face (12), extending substantially radially to the bore (5) and facing away from the open end (3) of the body.
3. A liquid tight connector according to claim 2 wherein said substantially planar face (12) extends at an angle inwardly away from the open end of the body
4. A liquid tight connector according to any one of claims 1 to 3 wherein there is also located a resiliently deformable seal (27) in said bore to seal in a liquid tight manner against the conduit pushed into said bore at or adjacent its free end.
GB8924271A 1986-02-05 1987-02-05 Corrugated plastic pipe connector Expired - Lifetime GB2223287B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8924271A GB2223287B (en) 1986-02-05 1987-02-05 Corrugated plastic pipe connector

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AUPH445986 1986-02-05
GB8723270A GB2194609B (en) 1986-02-05 1987-02-05 Corrugated plastic pipe connector
GB8924271A GB2223287B (en) 1986-02-05 1987-02-05 Corrugated plastic pipe connector

Publications (3)

Publication Number Publication Date
GB8924271D0 GB8924271D0 (en) 1989-12-13
GB2223287A true GB2223287A (en) 1990-04-04
GB2223287B GB2223287B (en) 1990-09-19

Family

ID=25643050

Family Applications (2)

Application Number Title Priority Date Filing Date
GB8924270A Expired - Fee Related GB2225550B (en) 1986-02-05 1987-02-05 Method of moulding
GB8924271A Expired - Lifetime GB2223287B (en) 1986-02-05 1987-02-05 Corrugated plastic pipe connector

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB8924270A Expired - Fee Related GB2225550B (en) 1986-02-05 1987-02-05 Method of moulding

Country Status (1)

Country Link
GB (2) GB2225550B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9305259U1 (en) * 1993-04-06 1993-06-09 Reiku GmbH, 5276 Wiehl Fastening coupling for corrugated pipes
DE9306316U1 (en) * 1993-04-27 1993-06-09 Hella KG Hueck & Co, 4780 Lippstadt Washing device for a lens of a lamp or headlight
GB2373303A (en) * 2001-01-23 2002-09-18 Smiths Group Plc Pipe Couplings

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH687253A5 (en) * 1993-03-30 1996-10-31 Createchnic Ag Plastic closure.
ES2143204T3 (en) * 1995-05-24 2000-05-01 Merz & Krell PRODUCTION OF SECTIONS OF DETACHABLE UNITS.
EP0783950A1 (en) * 1996-01-09 1997-07-16 GB Electrical, Inc. Removal from the mold of injection-molded tie having strong pawl
DE69607128T2 (en) * 1996-01-09 2000-07-13 Soerensen Soeren Christian Removal of an injection molded tie from a mold by moving a core located on the outside of the stop wall of the tie
EP0783953A1 (en) * 1996-01-09 1997-07-16 GB Electrical, Inc. Removal of injection-molded tie from mold by temporarily retaining core between pawl and abutment surface of tie
EP1025971B1 (en) * 1999-02-03 2003-07-02 Universal S.p.A. Mould for writing instrument cap and respective cap
GB0200455D0 (en) * 2002-01-10 2002-02-27 Smiths Group Plc Pipe couplings
GB0202303D0 (en) 2002-02-01 2002-03-20 Smiths Group Plc Pipe couplings

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2014681A (en) * 1978-02-21 1979-08-30 Wavin Bv Pipe Coupling
US4441745A (en) * 1980-08-22 1984-04-10 Wavin B.V. Coupling pipe part for interconnecting corrugated pipe parts
US4575133A (en) * 1984-05-18 1986-03-11 Commander Electrical Materials, Inc. Conduit connector

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2014681A (en) * 1978-02-21 1979-08-30 Wavin Bv Pipe Coupling
US4441745A (en) * 1980-08-22 1984-04-10 Wavin B.V. Coupling pipe part for interconnecting corrugated pipe parts
US4575133A (en) * 1984-05-18 1986-03-11 Commander Electrical Materials, Inc. Conduit connector

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9305259U1 (en) * 1993-04-06 1993-06-09 Reiku GmbH, 5276 Wiehl Fastening coupling for corrugated pipes
DE9306316U1 (en) * 1993-04-27 1993-06-09 Hella KG Hueck & Co, 4780 Lippstadt Washing device for a lens of a lamp or headlight
GB2373303A (en) * 2001-01-23 2002-09-18 Smiths Group Plc Pipe Couplings
GB2373303B (en) * 2001-01-23 2004-07-21 Smiths Group Plc A pipe coupling having inner and outer layers of deformable material

Also Published As

Publication number Publication date
GB2225550A (en) 1990-06-06
GB2223287B (en) 1990-09-19
GB2225550B (en) 1990-09-19
GB8924270D0 (en) 1989-12-13
GB8924271D0 (en) 1989-12-13

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PE20 Patent expired after termination of 20 years

Effective date: 20070204