AU2011240323C1 - Expansion head for expansion tools and expansion tool comprising said expansion head - Google Patents
Expansion head for expansion tools and expansion tool comprising said expansion head Download PDFInfo
- Publication number
- AU2011240323C1 AU2011240323C1 AU2011240323A AU2011240323A AU2011240323C1 AU 2011240323 C1 AU2011240323 C1 AU 2011240323C1 AU 2011240323 A AU2011240323 A AU 2011240323A AU 2011240323 A AU2011240323 A AU 2011240323A AU 2011240323 C1 AU2011240323 C1 AU 2011240323C1
- Authority
- AU
- Australia
- Prior art keywords
- expansion
- guide
- inner flange
- expansion head
- expandable jaws
- 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.)
- Ceased
Links
- 229920003023 plastic Polymers 0.000 claims abstract description 19
- 239000004033 plastic Substances 0.000 claims abstract description 19
- 229910052751 metal Inorganic materials 0.000 claims abstract description 9
- 239000002184 metal Substances 0.000 claims abstract description 9
- 150000002739 metals Chemical class 0.000 claims abstract description 9
- 230000000295 complement effect Effects 0.000 claims abstract description 8
- 230000004308 accommodation Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 13
- 239000000463 material Substances 0.000 description 5
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D41/00—Application of procedures in order to alter the diameter of tube ends
- B21D41/02—Enlarging
- B21D41/026—Enlarging by means of mandrels
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
- Mutual Connection Of Rods And Tubes (AREA)
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
Abstract
The invention relates to an expansion head (1) for expansion tools for hollow workpieces, in particular for the ends of pipes made of plastics and made of metals covered with plastics, comprising a union cap (2), which has a guide flange (3) directed radially inward, and a set of sector-shaped expandable jaws (4), which are each guided individually on the guide flange (3) in a radially movable manner by an inner flange sector (5), which overlaps with the guide flange (3), and by a radial groove (6), wherein an annular returning means (7) for returning the expandable jaws (4) is arranged on the inner flange sectors (5) in complementary groove sectors (14) on the inner flange sectors (5), each of the inner flange sectors (5) is rigidly connected to an end of a guide pin (8), radial guide grooves (9) for the accommodation and the motion of the guide pins (8) are arranged in the guide flange (3), and the other ends of the guide pins (8) do not protrude beyond the side of the union cap (2) facing the expansion area of the expandable jaws (4). The invention further relates to an expansion tool for hollow workpieces, in particular for the ends of pipes made of plastics and made of metals covered with plastics, comprising such an expansion head (1).
Description
- 1 Expansion head for expansion tools and expansion tools comprising this Field of the Invention [0001] The present invention relates to an expansion head for expansion tools for hollow workpieces, in particular for the ends of pipes made of plastic or plastic-coated metals. Background to the Invention [0002] Any discussion of the prior art throughout the specification should in no way be considered as an admission that such prior art is widely known or forms part of common general knowledge in the field. [0003] These kinds of expansion heads are known in the state of the art. [0004] For example, EP 0 044 795 A2 describes such an expansion head with a union cap and a plurality of sector-shaped jaws connected by an elastic holding means and arranged rotatably and concentrically in the union cap. When expanding pipes, the individual segments of such rotatably arranged concentric jaw sectors tend to cant, resulting in an uneven expansion pattern as the segments can be displaced in their position due to a rotational movement of the head. In the most extreme case, the segments can be arranged immediately next to each other due to the rotational movement, creating an uneven expansion pattern. Especially when expanding thin-walled multi-layered composite pipes/polymer pipes, the edges of the segment can cut into the pipe material, creating substantial longitudinal grooves, causing substantial weakening of the pipe material and therefore a weak point for a subsequent connection. The sector shaped design of the segments results in an uneven expansion pattern (polygon) during the expansion process, hampering insertion of the connecting technology (e.g. a fitting). For this reason, a second expansion process involving rotation of the segments or the head is required after the first expansion process in order to achieve an essentially even expansion pattern. During the second expansion process the expansion head must be positioned so that the expansion ridge created in the pipe material by the gap between the expansion jaws in their expanded state is covered by the width of the segment in the second expansion process. [0005] However, this is very difficult in practice due to the segments not being fixed in the union cap, especially because the segments may get caught on the expansion ridges, so that the positions of the individual segments are hardly altered in relation to the pipe or not at all.
-2 This also results in substantial longitudinal grooves that have a negative impact on connection quality. [0006] In order to improve the gap pattern, DE 42 02 348 C1 describes an expansion head for expansion tools for hollow workpieces, in particular for the ends of pipes made of plastics and of plastic coated metals with a union cap with a radially inward pointing guide flange and a set of sector shaped expandable jaws that are each guided movably and individually with an internal flange sector and an external flange sector and a radial groove formed between these, where annular tension springs for returning the expandable jaws are arranged on the internal flange sectors in complementary grooved sectors and where the external flange sectors have essentially the same diameter as the internal flange sectors and bored holes are arranged in the internal flange sectors for accommodating the ends of guide pins and where radial guide grooves for accommodating and moving guide pins are arranged in the guide flange, where the outer flange sectors also have bored holes in which the other ends of the guide pins are accommodated, the guide pins having a press fit in at least one of the two matching boreholes and also annular tension springs on the outer flange sectors for returning the expandable jaws in complementary grooved sectors. [0007] The complexity of the design (external flange sector and internal flange sector) results in the following disadvantages. An expansion head of that kind has a large free segment length due to the required height of the outer flange sector, i.e. a considerable length of part of the expansion head that projects over the guide flange of the union cap. Particularly in the case of stepped expansion heads (expansion heads that are suitable to expand pipes of different dimensions) and expansion heads for large pipe diameters, this considerable free segment length can result in segments tilting. Such tilting of the individual segments then culminates in assymmetrical or uneven expansion patterns, which causes. Particularly when expanding thin walled multi-layered composite pipes/polymer pipes, tilting of segments can result in longitudinal grooves that extend over the entire expansion length. [0008] However, such longitudinal grooves constitute potential weak points with the various connection techniques (axial/radial press fit connections and plug type fittings). [0009] It is an object of the present invention to overcome or ameliorate at least one of the disadvantages of the prior art, or to provide a useful alternative.
-3 [0009a] The aim of the expansion head according to a preferred form of the invention is largely to prevent the formation of longitudinal grooves in the workpiece material during the expansion process. Furthermore, the expansion head according to a preferred form of the invention is designed to ensure an even and symmetrical expansion pattern during the expansion process. Summary of the Invention [0010] A first aspect of the present invention provides an expansion head for expansion tools for hollow workpieces, in particular for the ends of pipes made of plastics and plastic coated metals, comprising: - a union cap with a radial inward directed guide flange, - a set of sector-shaped expandable jaws, each of which is individually guided on the guide flange and in a radial groove of the union cap in a radially moveable manner by means of an inner flange sector that overlaps with the guide flange, where - an annular returning means for returning the expandable jaws in complementary grooved sectors on the inner flange sectors is arranged on the inner flange sectors, - each of the inner flange sectors is rigidly connected to one end of a guide pin in each case, - radial guide grooves for accommodating and moving the guide pins are arranged in the guide flange, and - the other ends of the guide pins do not project over the side of the union cap facing the expansion area of the expandable jaws. [0011] Unless the context clearly requires otherwise, throughout the description and the claims, the words "comprise", "comprising", and the like are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is to say, in the sense of "including, but not limited to". [0012] In accordance with the present invention, it has been recognised that by leaving off the outer flange areas on the sector-shaped expandable jaws, the sector shaped expandable jaws are each guided reliably by an internal flange sector which overlaps with the guide flange of the union cap and a radial groove on the guide flange in each case, making it - 3a possible to prevent the formation of longitudinal grooves in the material of the hollow workpiece during the expansion process. By leaving off the outer flange areas, in contrast to the expansion head described in DE 42 02 348 Cl and extending the guide pins as far as possible and to the outside of the guide flange, this creates an expansion head with a compact structure, i.e. a minimal free segment length. This minimises the danger of tilting the sector shaped expandable jaws. An even and symmetrical expansion pattern of the -4 expansion head according to the invention is ensured for this reason and due to the sector shaped expandable jaws being guided reliably. [0013] Consequently, the present invention involves an expansion head for expansion tools for hollow workpieces, in particular for the ends of pipes made of plastic and plastic coated metals, which comprises a union cap with a radially inward oriented guide flange and a set of sector shaped expandable jaws, each of which are guided individually in their radial movement on the guide flange by an inner flange sector that overlaps with the guide flange and a radial groove, where an annular returning means for returning the expandable jaws in complementary grooved sectors on the inner flange sectors is arranged on the inner flange sectors, each of the inner flange sectors is rigidly connected to one end of a guide pin in each case, radial guide grooves for accommodating and moving the guide pins are arranged in the guide flange, and the other ends of the guide pins do not project over the side of the union cap facing the expansion area of the expandable jaws or facing the free segment length of the expandable jaws. [0014] In this case, the "expansion area" is defined as the area of the expansion head in which the hollow workpiece to be expanded during the expansion process is located. This lies against the outside of the expandable jaws. [0015] Furthermore, the present invention also involves an expansion tool for hollow workpieces, particularly for the ends of pipes made of plastics and plastic coated metals, which comprises an expansion head according to the invention. [0016] In relation to the expansion head according to the invention, it can be advantageous if the fixed connection between the one end of the guide pins and the inner flange sector is developed in such a manner that a borehole is arranged in each of the inner flange sectors and each borehole accommodates one end of a guide pin. In this case it can prove to be particularly efficacious if the one end of each guide pin is secured by means of a press fit in the corresponding borehole in the inner flange sector, is screwed into the matching borehole in the corresponding inner flange sector (5) by means of a thread or is pinned to the matching borehole in the corresponding inner flange sector (5). Such a guide pin connection with the inner flange sectors has proven to be particularly stable in practice and cost effective to manufacture. Alternatively, it can also be beneficial if the one end of each of the guide pins is moulded in one piece to the inner flange sector.
-5 [0017] It can also be helpful if the expandable jaws are fastened in their axial orientation in the union cap by means of a fastener. By fastening the sector shaped expandable jaws in the union cap or retaining nut by means of a fastener, production tolerances and therefore the play of the sector shaped expandable jaws can be optimised and/or set. In this case the use of a retaining disc pressed into the union cap, a threaded disc or a snap ring as a means of fastening has proven to be useful. Pre-tensioning of the expandable jaws in the union cap can be set extremely precisely and therefore optimised with the use of a threaded disk in particular, set into the internal thread of the union cap. [0018] It can also be favourable if the annular return means is an annular tension spring or an elastic O-ring. Return means of this kind are cost efficient and ensure the reliable return of the sector shaped expandable jaws. [0019] Furthermore, it can prove favourable if the expandable jaws each have an extension, such that the tapered segment surfaces on the inside of the expandable jaws extend past the inner flange segments into the union cap. This measure further reduces the risk of the expandable jaws tilting. Furthermore, this prevents the expandable jaws spreading apart during the insertion phase of an expanding mandrel of an expansion tool when the expandable jaws are unloaded, i.e. without the hollow workpiece (pipe) drawn over the expandable jaws. This facilitates placing the hollow workpiece on the expandable jaws. [0020] It can also be helpful if the expandable jaws are provided with a tapered section on their side facing away from the union cap. A more even transition between the expanded and the non-expanded part of the hollow workpiece after the expansion process can be achieved in this way. Brief description of the drawings [0021] Preferred embodiments of the invention will now be described, by way of example only, with reference to the accompanying drawings in which: [0022] Figure 1 shows an aerial view of an expansion head according to one embodiment of the present invention in a closed state. [0023] Figure 2 shows a cross sectional representation of the expansion head shown in Fig. 1 along the line A-A looking in the direction of the arrow.
-6 [0024] Figure 3 shows an aerial view of the expansion head shown in Fig. 1 in the open state. [0025] Figure 4 shows a cross-sectional representation of the expansion head shown in Fig. 3 along the line A-A looking in the direction of the arrow. [0026] Figure 5 shows a cross-sectional representation of the expandable jaws of the expansion head shown in Fig. 1 along the line A-A looking in the direction of the arrow. Detailed description of preferred embodiments [0027] The figures show an expansion head according to one embodiment of the present invention in the closed state (Fig.1 and 2) and in the open state (Fig. 3 and 4). [0028] The expansion head 1 according to the invention comprises a union cap 2 with a radially inward facing guide flange 3 and a set of sector shaped expandable jaws 4. Together, the set of sector shaped expandable jaws 4 in the closed state of the expansion head 1 results in a closed form with an essentially cylindrical shape in the expansion area of the expansion head 1. [0029] In preferred embodiments of the present invention the expandable jaws 4 are provided with a recess in the area distal from the union cap 2, resulting in a cylinder in the closed state of the expansion head that has a smaller diameter than the cylinder in the area of the expandable jaws 4 adjacent to the union cap 2. [0030] This means that the expansion head 1 according to the invention can be employed as a stepped expansion head, i.e. for expanding pipes with two different pipe diameters (for example 16 mm and 20 mm). [0031] Each of the sector shaped expandable jaws 4 is individually guided radially in its movement on the guide flange 3 by an inner flange sector 5 that overlaps with the guide flange 3 and a radial groove 6 in the union cap 2. The inner flange sectors 5 are provided with grooved sectors 14 on their outer sides (Fig. 5). The grooved sectors 14 complement each other in the overall circumference of the expansion head 1 to form a continuous groove on the outer side of the inner flange sectors 5 which accommodates an annular return means 7 for returning the expandable jaws 4 from the open state of the expansion head 1 to the closed state. Preferably, the means of return is to be selected such that the return force is -7 sufficient for returning the expandable jaws 4 from the open to the closed state. In the embodiment shown, the return means 7 is an annular tension spring 7. Alternatively, an elastic O-ring can also be employed in an advantageous manner. Each of the inner flange sectors 5 is provided with a borehole, each of which accommodates one end of a guide pin 8. [0032] Radial guide grooves 9 are arranged in the guide flange 3 for accommodating and moving the guide pins 8. The number of guide grooves 9 corresponds to the number of guide pins 8 and therefore the number of expandable jaws 4 of the expansion head 1. Each of the guide pins 8 are connected firmly with the inner flange sectors 5 through a pressed fit in the matching borehole in the inner flange sectors 5, with each of the guide pins 8 running parallel to axis B (Fig. 2 and Fig. 4). In alternative embodiments of the expansion head 1 according to the invention each of one of the ends of the guide pins 8 can be screwed into a thread in the borehole or be pinned with the inner flange sector 5. Furthermore, the guide pins 8 can be moulded as one piece to each corresponding inner flange sector 5. The guide pins 8 in these embodiments also each run parallel to axis B. The other ends of the guide pins 8 do not project over the side of the guide flange 3 facing the working area of the expandable jaws 4. This results in a compact construction of the expansion head 1 according to the invention, reducing the risk of the expandable jaws 4 tilting. [0033] The inside of the union cap 2 is provided with a thread 11, by means of which the expansion head 1 according to the invention can be screwed onto an expansion tool by means of a complimentary external thread. In principle, the expansion tool is a tool with a manual or electric drive for driving a mandrel in an axial direction. The mandrel is shaped like a cone with a certain angle of taper. [0034] A means of fastening serves to secure the expandable jaws 4 axially in the union cap 2. The embodiment of the expansion head according to the invention shown in the figures employs a retaining disc 13 pressed into the union cap 2 as a fastening means for the expandable jaws 4. In alternative embodiments a snap ring, a disc with a snap ring or a threaded disc inserted into a thread on the inside of the union cap 2 can be used as a means of fastening. [0035] The expandable jaws 4 are manufactured by separating (sawing) a rotationally symmetrical body with the axis B along the gap 10. In the embodiments shown in the figures, the body was separated into six equal segments that form the expandable jaws 4 (Fig. 2).
-8 [0036] The inner side of the expandable jaws 4 are bounded by the tapered segment surfaces 12, which complement each other to form a conical surface when the expansion head 1 is in a closed state. [0037] The included angle of the tapered segment surfaces 12 thus corresponds to the taper angle of the mandrel of the expansion tool. Therefore the conical surface of the mandrel works together with the tapered segment surfaces 12 of the expandable jaws 4 during the expansion process. Driving the mandrel into the expansion head causes the conical surface of the mandrel to push the tapered segment surfaces 11 of the expandable jaws radially outward. If a hollow workpiece, for example a plastic pipe, is guided over the outer surfaces of the expansion head 1, the outer surfaces of the expansion head 1 initially lie against the inside of the pipe. Increasing the insertion depth of the mandrel moves the outer surfaces of the expandable jaws 4 radially outward, expanding the end of the pipe that has been guided over the expandable jaws 4. [0038] The expandable jaws 4 are each provided with an extension 13 in the part located in the union cap 2 such that the tapered segment surfaces 12 on the inside of the expandable jaws 4 extend over the inner flange segments 5 into the union cap 2. In order to reduce the risk of forming longitudinal grooves in the expanded workpiece, the outer edges in the longitudinal direction of the expandable jaws can be rounded or chamfered. [0039] In preferred embodiments of the present invention the expandable jaws 4 have a conical section 15 in their region facing away from the union cap 2. Such a conical section can provide a more even transition between the expanded and the non-expanded part of the hollow workpiece after the expansion process. [0040] Although the invention has been described with reference to specific examples it will be appreciated by those skilled in the art that the invention may be embodied in many other forms.
Claims (12)
1. Expansion head for expansion tools for hollow workpieces, in particular for the ends of pipes made of plastics and plastic-coated metals, comprising: - a union cap with a radial inward directed guide flange, - a set of sector-shaped expandable jaws, each of which is individually guided on the guide flange and in a radial groove of the union cap in a radially moveable manner by means of an inner flange sector that overlaps with the guide flange, where - an annular returning means for returning the expandable jaws in complementary grooved sectors on the inner flange sectors is arranged on the inner flange sectors, - each of the inner flange sectors is rigidly connected to one end of a guide pin in each case, - radial guide grooves for accommodating and moving the guide pins are arranged in the guide flange, and - the other ends of the guide pins do not project over the side of the union cap facing the expansion area of the expandable jaws.
2. Expansion head according to Claim 1, wherein the rigid connection of the one ends of the guide pins to the inner flange sectors is developed in such a manner that a borehole is arranged in each of the inner flange sectors, in which one end of a guide pin is accommodated in each case.
3. Expansion head according to Claim 2, wherein the one end of each of the guide pins is force-fitted by means of a press fit in the matching borehole in the inner flange sector, is screwed into the matching borehole in the corresponding inner flange sector by means of a thread or is pinned to the matching borehole in the corresponding inner flange sector.
4. Expansion head according to Claim 1, wherein one end of each of the guide pins is moulded as one piece to the inner flange sector in each case.
5. Expansion head in accordance with any one of Claims 1 to 4, wherein the expandable jaws are rigidly secured in an axial orientation in the union cap by a fastener.
6. Expansion head according to Claim 5, wherein the fastener is a retaining disc pressed into the union cap, a threaded disc or a snap ring. -10
7. Expansion head in accordance with any one of Claims 1 to 6, wherein the annular returning means is an annular tension spring or an elastic O-ring.
8. Expansion head in accordance with any one of Claims 1 to 7, wherein the expandable jaws are each provided with an extension such that tapered segment surfaces on the inside of the expandable jaws extend over the inner flange segments into the union cap.
9. Expansion head in accordance with any one of Claims 1 to 8, wherein the expandable jaws are provided with a tapered section on the side facing away from the union cap.
10. Expansion tool for hollow workpieces, in particular for the ends of pipes made of plastics and plastic-coated metals, comprising an expansion head according to any one of Claims 1 to 9.
11. An expansion head for expansion tools for hollow workpieces substantially as herein described with reference to any one of the embodiments of the invention illustrated in the accompanying drawings and/or examples.
12. An expansion tool for hollow workpieces substantially as herein described with reference to any one of the embodiments of the invention illustrated in the accompanying drawings and/or examples.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE202010004948.2 | 2010-04-13 | ||
| DE202010004948U DE202010004948U1 (en) | 2010-04-13 | 2010-04-13 | Expander head for hollow workpieces with guided segments |
| PCT/EP2011/001782 WO2011128049A1 (en) | 2010-04-13 | 2011-04-11 | Expansion head for expansion tools and expansion tool comprising said expansion head |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| AU2011240323A1 AU2011240323A1 (en) | 2012-11-29 |
| AU2011240323B2 AU2011240323B2 (en) | 2014-12-11 |
| AU2011240323C1 true AU2011240323C1 (en) | 2015-04-02 |
Family
ID=44211018
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2011240323A Ceased AU2011240323C1 (en) | 2010-04-13 | 2011-04-11 | Expansion head for expansion tools and expansion tool comprising said expansion head |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP2558230B1 (en) |
| AU (1) | AU2011240323C1 (en) |
| DE (1) | DE202010004948U1 (en) |
| ES (1) | ES2490268T3 (en) |
| WO (1) | WO2011128049A1 (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202012104450U1 (en) * | 2012-11-19 | 2014-02-25 | Rehau Ag + Co | Expansion head for expansion tools and this comprehensive expansion tool |
| DE202012104763U1 (en) | 2012-12-07 | 2014-03-11 | Rehau Ag + Co. | Tool device for connecting a plastic pipe or a metal-plastic composite pipe to a fitting with a sliding or compression sleeve |
| DE102014107752A1 (en) | 2014-06-03 | 2015-12-03 | Rehau Ag + Co | Tool device for connecting a plastic pipe or a metal-plastic composite pipe to a fitting with a sliding or compression sleeve |
| CN104624825A (en) * | 2014-12-17 | 2015-05-20 | 南京航空航天大学 | Submerged-arc welding straight welded pipe diameter expansion outer fan-shaped block for deep sea and surface protection method thereof |
| CN105798113B (en) * | 2016-04-22 | 2017-08-25 | 山西平阳重工机械有限责任公司 | The semiclosed chamber resilient key expanding device of piston |
| US11543065B2 (en) | 2016-09-02 | 2023-01-03 | Zurn Industries, Llc | Extruded cold-expansion compression collar |
| US11541581B2 (en) | 2016-09-02 | 2023-01-03 | Zurn Industries, Llc | Injection molded cold-expansion compression collar |
| US11054076B2 (en) | 2016-11-04 | 2021-07-06 | Zurn Industries, Llc | Reinforcing ring with sleeve |
| US11220039B2 (en) | 2018-09-25 | 2022-01-11 | Milwaukee Electric Tool Corporation | PEX expansion tool |
| US11110646B2 (en) | 2019-07-23 | 2021-09-07 | Brochman Innovations, Llc | PEX tubing expander head |
| CN110681767A (en) * | 2019-10-15 | 2020-01-14 | 苏州工业园区麦特自动化技术有限公司 | Inner ring hydraulic expanding mechanism |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2304420A1 (en) * | 1975-03-15 | 1976-10-15 | Rothenberger Gmbh Co | APPARATUS FOR ENLARGING THE ENDS OF PIPING TUBES |
| EP0044795A2 (en) * | 1980-07-18 | 1982-01-27 | UNICUM S.A. (Société Anonyme) | Sizing tool for expanding tube ends |
| FR2645052A1 (en) * | 1989-03-31 | 1990-10-05 | Virax Sa | Improvements to expansion tools which are mounted on an apparatus for shaping the ends of pipes |
| EP0499094A2 (en) * | 1991-02-12 | 1992-08-19 | Rothenberger Werkzeuge-Maschinen Gmbh | Expanding tool for hollow work pieces |
| DE4202348C1 (en) * | 1992-01-29 | 1993-06-09 | Rothenberger Werkzeuge-Maschinen Gmbh, 6233 Kelkheim, De | Tube end expansion tool - has holding drillings for guide pins at inner and outer flange sectors |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB866994A (en) * | 1957-11-13 | 1961-05-03 | Wlodimierz Rast | Improvements in or relating to an expanding tool for pipes |
| DE19730054C1 (en) * | 1997-07-14 | 1999-03-18 | Eckhard Wolter | Expansion head with housing for screwing onto expander tongs |
| DE19924695C2 (en) * | 1999-05-28 | 2001-05-10 | Rothenberger Werkzeuge Ag | Expansion tool for hollow bodies and process for the production thereof |
-
2010
- 2010-04-13 DE DE202010004948U patent/DE202010004948U1/en not_active Expired - Lifetime
-
2011
- 2011-04-11 EP EP11715412.0A patent/EP2558230B1/en active Active
- 2011-04-11 ES ES11715412.0T patent/ES2490268T3/en active Active
- 2011-04-11 AU AU2011240323A patent/AU2011240323C1/en not_active Ceased
- 2011-04-11 WO PCT/EP2011/001782 patent/WO2011128049A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2304420A1 (en) * | 1975-03-15 | 1976-10-15 | Rothenberger Gmbh Co | APPARATUS FOR ENLARGING THE ENDS OF PIPING TUBES |
| EP0044795A2 (en) * | 1980-07-18 | 1982-01-27 | UNICUM S.A. (Société Anonyme) | Sizing tool for expanding tube ends |
| FR2645052A1 (en) * | 1989-03-31 | 1990-10-05 | Virax Sa | Improvements to expansion tools which are mounted on an apparatus for shaping the ends of pipes |
| EP0499094A2 (en) * | 1991-02-12 | 1992-08-19 | Rothenberger Werkzeuge-Maschinen Gmbh | Expanding tool for hollow work pieces |
| DE4202348C1 (en) * | 1992-01-29 | 1993-06-09 | Rothenberger Werkzeuge-Maschinen Gmbh, 6233 Kelkheim, De | Tube end expansion tool - has holding drillings for guide pins at inner and outer flange sectors |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2558230A1 (en) | 2013-02-20 |
| AU2011240323B2 (en) | 2014-12-11 |
| WO2011128049A1 (en) | 2011-10-20 |
| AU2011240323A1 (en) | 2012-11-29 |
| DE202010004948U1 (en) | 2011-09-01 |
| ES2490268T3 (en) | 2014-09-03 |
| EP2558230B1 (en) | 2014-05-14 |
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| DA3 | Amendments made section 104 |
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| FGA | Letters patent sealed or granted (standard patent) | ||
| HB | Alteration of name in register |
Owner name: REHAU AUTOMOTIVE SE & CO. KG Free format text: FORMER NAME(S): REHAU AG + CO |
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| PC | Assignment registered |
Owner name: REHAU INDUSTRIES SE & CO. KG Free format text: FORMER OWNER(S): REHAU AUTOMOTIVE SE & CO. KG |
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| MK14 | Patent ceased section 143(a) (annual fees not paid) or expired |