WO2001089736A1 - Dispositif de poussoir coulissant - Google Patents

Dispositif de poussoir coulissant Download PDF

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Publication number
WO2001089736A1
WO2001089736A1 PCT/NO2001/000213 NO0100213W WO0189736A1 WO 2001089736 A1 WO2001089736 A1 WO 2001089736A1 NO 0100213 W NO0100213 W NO 0100213W WO 0189736 A1 WO0189736 A1 WO 0189736A1
Authority
WO
WIPO (PCT)
Prior art keywords
expansion
plunger
actuator
tool
slide
Prior art date
Application number
PCT/NO2001/000213
Other languages
English (en)
Inventor
Henning Ruud
Original Assignee
Henning Ruud
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 Henning Ruud filed Critical Henning Ruud
Priority to AU62808/01A priority Critical patent/AU6280801A/en
Publication of WO2001089736A1 publication Critical patent/WO2001089736A1/fr

Links

Classifications

    • 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
    • B29C57/00—Shaping of tube ends, e.g. flanging, belling or closing; Apparatus therefor, e.g. collapsible mandrels
    • B29C57/02—Belling or enlarging, e.g. combined with forming a groove
    • B29C57/04—Belling or enlarging, e.g. combined with forming a groove using mechanical means

Definitions

  • This invention relates to a slide plunger device in an expansion device in connection with an expansion tool.
  • the expansion device is used in connection with the simultaneous cold expansion of an end portion of a plastic pipe and possibly an external ring associated with the end portion of the plastic pipe, said pipe, and possibly the ring, preferably being formed of so-called PEX plastic material.
  • a connecting nipple e.g., may be inserted into the plastic pipe, the plastic pipe and the associated ring contracting thereupon due to their elastic properties, thereby shrinking firmly around the connecting nipple, so that a pressure-tight connection is achieved.
  • Such pipes and rings of PEX plastic material are normally used in connection with plumbing operations with the aim of supplying for example pressurized water to family houses and other buildings. Background of the Invention
  • the invention has its background in the limitations or drawbacks exhibited by the known expansion tools in practical use thereof in connection with the fitting of plastic pipes preferably of PEX plastic material.
  • a pair of manually operated expansion tongs may be used to cold-expand an end portion of a PEX plastic pipe and possibly to cold-expand an associated PEX plastic ring positioned externally thereon, the expansion tongs being operated manually.
  • the expansion tongs are provided with an expansion device formed by a conical slide plunger and an expansion head with several expansion jaws, the constructional character and operation of the expansion tongs being described in detail in the exemplary embodiment mentioned below, the purpose thereof being to visualize differences between the expansion device of the expansion tongs and the expansion device according to the invention.
  • the hydraulically activated expansion tool is based on the use of a similar expansion devise formed, i.a., by a conical slide plunger and a corresponding and surrounding expansion head provided with several elongate expansion jaws.
  • the conical slide plunger of the hydraulically activated expansion tool is also formed by an elongate spacer positioned along the centre axis of the cone, the cone and the spacer being fixedly arranged to one another, but the spacer being arranged, at the opposite end of the cone, to a hydraulic thrust device, e.g. a hydraulic cylinder, exerting the necessary thrust force in the axial direction of the slide plunger.
  • the hydraulically activated expansion tool is normally used on PEX plastic pipe diameters larger than the diameter dimensions that manual expansion tongs may normally be used for, the expansion of larger pipe diameters requiring greater expansion force than what such expansion tongs can provide. Therefore, such an expansion tool is preferably used industrially, e.g. in plumbing in larger buildings and facilities.
  • PEX plastic pipes are advantageous in use for such plumbing operations, as the PEX plastic pipe materials, as compared to metal pipes, do not corrode, e.g., they bend more flexibly, are less prone to internal depositing, have better flow properties, are cheaper to buy and relatively maintenance-free.
  • the hydraulically activated expansion tool is normally used for PEX plastic pipe diameters larger than the diameter sizes that manual expansion tongs may normally be used for, and such an expansion tool is therefore used preferably in larger buildings and facilities.
  • a hydraulically activated expansion tool is expensive to buy, the tool is, seen relative to expansion tongs, big and heavy and impractical to use in small, narrow and relatively inaccessible areas, which are often found in a family house.
  • the object of the invention is to provide a slide plunger device in an expansion device, so that the slide plunger may preferably be releasably arranged to an actuator, the actuator preferably being of an electromechanical kind and placed in a portable gun tool.
  • the actuator should exert the required thrust force on, and cause displacing motion of, the slide plunger.
  • the expansion jaws of the expansion device are supplied with the required expansion force for the expansion of an end portion of a plastic pipe and possibly an associated ring, located externally on the plastic pipe, the plastic pipe and possibly the ring preferably being formed of PEX plastic material.
  • a connecting nipple e.g., may be inserted into the plastic pipe, the plastic pipe and the associated ring contracting thereupon, due to their elastic properties, thereby shrinking firmly around the connecting nipple.
  • a gun tool arranged thereto, it would be possible to increase the practical use of e.g. PEX plastic pipes in connection with plumbing operations in family houses and buildings, preferably.
  • the object is realized through the use of a slide plunger device in an expansion device in an expansion tool.
  • the slide plunger used in the present invention has many similarities to the conical slide plunger used in the above- mentioned expansion tongs.
  • the expansion tongs are provided with a slide plunger, which is formed longitudinally of two slide element portions, one slide element portion being a cone, the other slide element portion being an elongate spacer positioned along the centre axis of the cone, the cone and the spacer being fixedly arranged to one another, the cone projecting further than the spacer from the centre line of the cone near the transition between the cone and the spacer.
  • the slide plunger may be formed longitudinally by just one plunger body, e.g. a cone, possibly a plunger body provided with an end piece fixedly arranged thereto, the plunger body, possibly the end piece fixedly arranged to the plunger body, being arranged to allow an actuator to be arranged preferably releasably thereto, and preferably an electromechanical actuator arranged in a portable gun tool.
  • the expansion device is formed, moreover, by an expansion head with expansion jaws and a jaw sleeve, the internal surfaces of the expansion jaws, surrounding the plunger body in the position of use, being formed complementary relative to the external surface shape of the plunger body.
  • the expansion device is arranged, fixedly or releasably, to the actuator, so that the connecting element preferably forms the muzzle portion of the gun tool.
  • the characteristic of the present invention is that the actuator is arranged to one end portion of an actuator shaft, preferably a non-rotating actuator shaft, whereas the other end portion of the actuator shaft is arranged, preferably releasably, to the plunger body, or possibly is arranged, preferably releasably, to the end piece which is fixedly arranged to the plunger body, a possible releasable coupling connection being formed of a threaded coupling connection or a bayonet connection.
  • the plunger body and the connecting element may for example be arranged with a diametrically located hole therethrough, so that by means of a key tool placed in the hole the threaded connection may be made up to a sufficiently great torque.
  • the expansion device may be arranged to an actuator, preferably of the electromechanical kind in a portable gun tool, wherein such a gun tool may have an external configuration and size resembling e.g. an electric power drill, and such a tool may be provided with e.g a rechargeable battery or be connected to an electric supply cable.
  • a simpler, more efficient and usable tool may be provided for the expansion of e.g. PEX plastic pipes and PEX plastic rings.
  • such a gun tool may be operated just by one hand, which means that the other hand may be used, for example, to hold securely a flexible PEX plastic pipe which is sought to be expanded and which is projecting freely from a wall.
  • FIG. 1 showing a view in a partial section of a pair of 0 expansion tongs according to known technique, the components of the tongs being visualized in the position of use, the expansion .jaws of the tong cold-expanding a PEX plastic pipe and an externally located PEX plastic ring;
  • Fig. 2 showing a view and a partial section of an expansion 5 device with a portable gun tool arranged thereto, said expansion device comprising the present slide plunger device, the components of the expansion device moreover being shown in the form of a split view, wherein the expansion jaws of the expansion device are shown in an inactive position, in which the jaws are bearing on each other, and in which the expansion device is releasably connected by means of a conical slide plunger to an electromechanical actuator positioned in the gun tool, the drawings only showing the portion of the gun tool which is connected to the expansion, device; and
  • FIG. 3 showing the same expansion device as that shown in Fig. 2, but the components of the expansion device otherwise being assembled, the expansion jaws of the expansion device cold-expanding a PEX plastic pipe and a PEX plastic ring placed externally thereon.
  • An actuator preferably of the electromechanical kind . positioned in a portable gun tool, is hot indicated any further or described in further detail in this exemplary embodiment. Even though the actuator does not concern the invention itself, it is a necessary condition for the invention to be usable in connection with the expansion of a plastic pipe, and possibly a plastic ring surrounding the plastic pipe, the pipe and the ring preferably being formed of PEX plastic material.
  • a pair of such expansion tongs 2 is formed by two elongate and connected tong parts 4 and 6.
  • the two tong parts 4 and 6 are connected at respective end portions by means of a connecting piece 8, which is provided with a through bore 10 and 12 at the respective end portions.
  • the through bores 10 and 12 correspond with through bores, not shown in the drawings, in the material of the tong parts 4 and 6, there being positioned through each bore 10 and 12 and through each through bore, not shown in the drawings, of the. aterial of . the tong parts 4 and 6, a rotary shaft 14 and 16, cf. Fig. 1.
  • the tong part 4 has an elongate slide plunger 18 rotatably arranged thereto, whereas the tong part 6 is provided with a through bore 20 and an external connecting element 22 at its connecting portion, the bore 20 and the connecting element 22 being in a through connection with each other, and through which connecting element 22 and bore 20 the elongate slide plunger 18 is positioned displaceable along the centre axis of the connecting element 22.
  • the slide plunger 18 is formed by two slide element portions, one slide element portion thereof being formed by a cone 24, the other slide element portion being formed by an elongate spacer 26 placed along the centre axis of the cone 24, the cone 24 and the spacer 26 being fixedly arranged to each another, the cone 1 24 projecting further than the spacer 26 from its centre line; near the transition between, the cone 24 and the spacer 26.
  • the free end portion of the spacer 26 is rotatably arranged to the tong part 4, the slide plunger 18 being provided with a through bore 28 corresponding with corresponding through bores, not shown ' in the drawings, of the material of the tong part 4, there being placed through the bore 28 and each through bore, not shown in the drawings, of the material of the tong part 4, a rotary shaft 30, cf. Fig. 1.
  • the cone 24 of the slide plunger 18 has an expansion head 32 arranged surroundingly thereto.
  • the expansion head 32 is formed by a sleeve 34, there being rotatably arranged to the circumference of said sleeve 34 several elongate expansion jaws, of which only two expansion jaws 36 and 38 are shown in Fig.
  • the expansion jaws including the expansion jaws 36 and 38, projecting from the sleeve 34, in the following referred to as a jaw sleeve 34, along the longitudinal axis of the slide plunger 18.
  • the cone 24 of the slide plunger 18 is surrounded by the expansion jaws, including the expansion jaws 36 and 38, the internal surfaces thereof together forming a conical surface shape which is complementary to the external surface shape of the cone 24.
  • the jaw sleeve.34 of the expansion head ,32 is connected by a threaded connection to the connecting element 22 of the tong part 6.
  • the connecting element 22 is formed cylindrically, so that the cone 24 may be reciprocated longitudinally in this cylinder area.
  • the jaw sleeve 34 and the associated expansion jaws, including the expansion jaws 36 and 38 are connected to the connecting element 22, as the cone 24 is displaced in its longitudinal direction outwards towards the internal and conical surfaces of the expansion jaws, the cone 24 exerts a plunger-like thrust force on internal surfaces of the expansion jaws, including the expansion jaws 36 and 38.
  • the free end portions of the expansion jaws, including the expansion jaws 36 and 38 are pushed outwards, exerting an outward expansion force against an externally located end portion of a PEX plastic pipe 40 and an associated PEX plastic ring 42 positioned externally on the PEX plastic pipe 40.
  • the internal diameters of the PEX plastic pipe 40 and the PEX plastic ring 42 are expanded, so that immediately after that, a connecting nipple, not shown in the drawings, of a suitable external diameter may be inserted into the expanded end portion of the PEX plastic pipe 40.
  • the subsequent shrinking of the PEX plastic pipe 40 and the PEX plastic ring 42 then provides a pressure-tightening connection between the connecting nipple and the PEX plastic pipe 40.
  • the relative displacing motion that brings about the required outward expansion force between the cone 24 of the slide plunger 18 and the expansion jaws, including the expansion jaws 36 and 38, is provided in that at their free end portions opposite their connecting portions, the two tong parts 4 and 6 of the expansion tool are pushed manually towards each other in one or more turns by a certain thrust force.
  • the manual thrust force is subjected to a force transmission (gearing), as the tong parts 4 and 6 are arranged, at their connecting portions, with a torque transmitting device based on the lever principle, while at the same time the surface of the cone 24 relative to the centre axis of the .cone 24 has been given a suitable pitch angle, so that the expansion force transferred to, and acting between, the cone 24 and the internal surfaces of the expansion jaws, including. the expansion jaws 36 and
  • the expansion device of the present invention is provided with a thrust plunger 44, which is formed in its longitudinal direction by a plunger body, the plunger body being in the shape of, and in this exemplary embodiment being formed by, but not being limited to, a cone 46 provided with an end piece 48 arranged fixedly thereto, the end piece 48 being positioned at the end opposite the apex of the cone 46.
  • the slide plunger 44 may be formed by a cone without an end piece.
  • the end piece 48 In its position of use the end piece 48, alternatively a cone not shown, has an actuator, not shown in the drawn figures, releasably arranged thereto, the actuator being positioned in a portable gun tool 50.
  • the actuator, and thereby the gun tool 50 has one end portion of an actuator shaft 52 arranged thereto, preferably a non-rotating actuator shaft 52.
  • the characteristic of the present invention is that the second end portion of the actuator shaft 52 is releasably connected to the end piece 48 of the cone 46, or alternatively, that the second end portion of the actuator shaft 52 is releasably connected to the cone, not shown in the figures of the drawings, the releasable coupling connection of this exemplary embodiment being formed by a threaded connection.
  • this coupling connection may be formed of a bayonet connection, for example.
  • the end piece 48 is formed with a circular bore 54, the centre axis of the bore 54 coinciding with the centre axis of the cone 46, the bore 54 being provided, with an internal threaded portion corresponding, in its position of use, with a corresponding external threaded portion in the other end portion of the actuator shaft 52.
  • the cone may correspondingly be formed with a circular bore and a threaded coupling connection with an actuator shaft.
  • the slide plunger 44 of the present invention also has, and is surrounded by, an expansion head 56 and a connecting element 58.
  • the expansion head 56 is formed of a jaw sleeve 59, to the circumference of which jaw sleeve 59 several elongate expansion jaws are arranged rotatably, three expansion jaws 60, 62, and 64 thereof being shown in Fig. 2, projecting from the jaw sleeve 59 and along the longitudinal axis of the slide plunger 44.
  • the expansion jaws including the expansion jaws 60, 62 and 64, have the o jaw sleeve 59 rotatably arranged thereto in a support area 66.
  • the jaw sleeve 59 has e.g.
  • the connecting element 58 has a circular opening of the gun tool 50 releasably arranged thereto, the connecting element 58 at the same time surrounding the actuator shaft 52 of the gun tool 50.
  • the connecting element 58 may be o fixedly arranged to the gun tool 50, so that the connecting element 58 forms the muzzle portion of the gun tool.
  • the connecting element 58 is formed with a cylindrical bore 58', so that the ⁇ one 46 in its position of use and in its longitudinal direction may be reciprocated in 5 the bore 58', cf. Fig. 3.
  • the actuator shaft 52 In its position of use, when the actuator shaft 52 is releasably connected to the end piece 48 of the cone 46, or alternatively, when the actuator shaft 52 is releasably connected to the cone without an end piece, not shown in the drawings, the actuator is activated, pushing the 0 slide plunger 44, and 1 thereby the cone 46, towards the internal and conical surfaces of the expansion jaws, including the expansion jaws 60, 62 and 64.
  • this plunger-like thrust force is converted into an outward, and compared to the thrust force, much larger expansion force against a surrounding inner end portion of a PEX plastic pipe 68 and a surrounding PEX plastic ring 70, cf. Fig. 3, so that a connecting nipple, not shown,.
  • PEX plastic pipe 68 may then be inserted into the expanded end portion of the PEX plastic pipe 68.
  • the subsequent shrinking of the PEX plastic pipe 68 and PEX plastic ring 70 then provides a pressure-tightening connection between the connecting nipple and the PEX plastic pipe 68.
  • the cone 46 may be provided with a through hole 72 positioned diametrically, cf. Fig. 2 and Fig. 3, so that by means of a key tool, not shown, placed in the hole 72," "the threaded connection may be made up to a sufficiently great torque.
  • the connecting element 58 may be provided with a through hole 74 located diametrically.

Abstract

La présente invention concerne un dispositif (44) de poussoir coulissant dans un dispositif de dilatation d'un outil de dilatation. Ce poussoir (44) coulissant et une tête (56) de dilatation coopérante sont utilisés pour dilater à froid l'extrémité d'un tuyau de plastique de préférence (40, 68), de façon que, immédiatement après cette opération, un raccord de connexion par exemple puisse être introduit dans ce tuyau de plastique (40, 68). Puis, ce tuyau de plastique se rétracte fermement autour de ce raccord de connexion, de sorte qu'on obtient une connexion étanche. Ce dispositif est amovible et par l'intermédiaire d'un axe actionneur (52) le poussoir coulissant conique (44) peut disposer d'un actionneur agencé amovible, cet actionneur étant de préférence un actionneur de type électromécanique situé dans un pistolet portable (50).
PCT/NO2001/000213 2000-05-25 2001-05-23 Dispositif de poussoir coulissant WO2001089736A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU62808/01A AU6280801A (en) 2000-05-25 2001-05-23 Slide plunger device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO20002669 2000-05-25
NO20002669A NO20002669A (no) 2000-05-25 2000-05-25 Anordning ved skyvestempel

Publications (1)

Publication Number Publication Date
WO2001089736A1 true WO2001089736A1 (fr) 2001-11-29

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ID=19911187

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NO2001/000213 WO2001089736A1 (fr) 2000-05-25 2001-05-23 Dispositif de poussoir coulissant

Country Status (3)

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AU (1) AU6280801A (fr)
NO (1) NO20002669A (fr)
WO (1) WO2001089736A1 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1369188A1 (fr) * 2002-06-06 2003-12-10 Rothenberger Aktiengesellschaft Outil à main en forme de pince pour l' élargissement des corps creux
US8517715B2 (en) 2010-04-06 2013-08-27 Milwaukee Electric Tool Corporation PEX expanding tool
US9862137B2 (en) 2015-04-20 2018-01-09 Milwaukee Electric Tool Corporation PEX expanding tool
US9914260B2 (en) 2014-06-20 2018-03-13 Milwaukee Electric Tool Corporation PEX expanding tool
US10000007B2 (en) 2015-06-10 2018-06-19 Milwaukee Electric Tool Corporation PEX expanding tool
US11596999B2 (en) 2019-02-20 2023-03-07 Milwaukee Electric Tool Corporation PEX expansion tool
US11633775B2 (en) 2019-02-20 2023-04-25 Milwaukee Electric Tool Corporation PEX expansion tool
US11779990B2 (en) 2021-04-09 2023-10-10 Milwaukee Electric Tool Corporation Expansion tool
US11819902B2 (en) 2020-11-27 2023-11-21 Milwaukee Electric Tool Corporation Expansion tool

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5090230A (en) * 1991-04-02 1992-02-25 Kauno Koskinen Ky Pipe expanding pliers
EP0689886A1 (fr) * 1994-07-01 1996-01-03 Saneper, S.A. Dispositif d'évasement
WO1998006519A1 (fr) * 1996-08-13 1998-02-19 Wirsbo Rohrproduktion Und Vertriebs-Gmbh Expanseur a dispositif de retour
DE19730053C1 (de) * 1997-07-14 1998-10-15 Eckhard Wolter Vorrichtung zum Aufweiten der Enden rohrförmiger Werkstücke

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5090230A (en) * 1991-04-02 1992-02-25 Kauno Koskinen Ky Pipe expanding pliers
EP0689886A1 (fr) * 1994-07-01 1996-01-03 Saneper, S.A. Dispositif d'évasement
WO1998006519A1 (fr) * 1996-08-13 1998-02-19 Wirsbo Rohrproduktion Und Vertriebs-Gmbh Expanseur a dispositif de retour
DE19730053C1 (de) * 1997-07-14 1998-10-15 Eckhard Wolter Vorrichtung zum Aufweiten der Enden rohrförmiger Werkstücke

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6672128B2 (en) 2002-06-06 2004-01-06 Rothenberger Werkeuge Aktiengesellschaft Hand tool in pliers form for expanding hollow bodies
EP1369188A1 (fr) * 2002-06-06 2003-12-10 Rothenberger Aktiengesellschaft Outil à main en forme de pince pour l' élargissement des corps creux
US8517715B2 (en) 2010-04-06 2013-08-27 Milwaukee Electric Tool Corporation PEX expanding tool
US8763439B2 (en) 2010-04-06 2014-07-01 Milwaukee Electric Tool Corporation PEX expanding tool
US9914260B2 (en) 2014-06-20 2018-03-13 Milwaukee Electric Tool Corporation PEX expanding tool
US9993961B2 (en) 2015-04-20 2018-06-12 Milwaukee Electric Tool Corporation PEX expanding tool
US9862137B2 (en) 2015-04-20 2018-01-09 Milwaukee Electric Tool Corporation PEX expanding tool
US10926451B2 (en) 2015-04-20 2021-02-23 Milwaukee Electric Tool Corporation PEX expanding tool
US11648727B2 (en) 2015-04-20 2023-05-16 Milwaukee Electric Tool Corporation PEX expanding tool
US10000007B2 (en) 2015-06-10 2018-06-19 Milwaukee Electric Tool Corporation PEX expanding tool
US10946576B2 (en) 2015-06-10 2021-03-16 Milwaukee Electric Tool Corporation PEX expanding tool
US11596999B2 (en) 2019-02-20 2023-03-07 Milwaukee Electric Tool Corporation PEX expansion tool
US11633775B2 (en) 2019-02-20 2023-04-25 Milwaukee Electric Tool Corporation PEX expansion tool
US11819902B2 (en) 2020-11-27 2023-11-21 Milwaukee Electric Tool Corporation Expansion tool
US11779990B2 (en) 2021-04-09 2023-10-10 Milwaukee Electric Tool Corporation Expansion tool

Also Published As

Publication number Publication date
NO311204B1 (no) 2001-10-29
AU6280801A (en) 2001-12-03
NO20002669D0 (no) 2000-05-25
NO20002669A (no) 2001-10-29

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