CA1293430C - Tube expanders - Google Patents
Tube expandersInfo
- Publication number
- CA1293430C CA1293430C CA000542236A CA542236A CA1293430C CA 1293430 C CA1293430 C CA 1293430C CA 000542236 A CA000542236 A CA 000542236A CA 542236 A CA542236 A CA 542236A CA 1293430 C CA1293430 C CA 1293430C
- Authority
- CA
- Canada
- Prior art keywords
- cam
- mandrel
- lever arm
- tool
- tool body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
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
Abstract
ABSTRACT
An improved tube expander tool (10) comprising a tool body (11), an axially movable mandrel (17) extending through the body and having a tapered end (37), jaw mounting means (18) coupled to the tool body (11) and comprising a plurality of expandable jaw elements (55) mounted for radial displacement upon axial movement of the mandrel (17), an adjustable tool head (13) between the tool body (11) and the jaw mounting means (18) and being movable axially in relation to the tool body (11), and locking means (52) to lock the tool head (13) against axial movement when the tool head (13) has been selectively positioned, whereby the amount of expansion of the jaw elements (55) can be accurately controlled.
An improved tube expander tool (10) comprising a tool body (11), an axially movable mandrel (17) extending through the body and having a tapered end (37), jaw mounting means (18) coupled to the tool body (11) and comprising a plurality of expandable jaw elements (55) mounted for radial displacement upon axial movement of the mandrel (17), an adjustable tool head (13) between the tool body (11) and the jaw mounting means (18) and being movable axially in relation to the tool body (11), and locking means (52) to lock the tool head (13) against axial movement when the tool head (13) has been selectively positioned, whereby the amount of expansion of the jaw elements (55) can be accurately controlled.
Description
1~3'~3~3 "IMPROVEMENTS IN AND RELATING TO TU~E EXPANDERS"
This invention relates to improvements in and to tools for expanding the ends of tubes/pipes, and in particular it relates to tube expanders of the type in which a plurality of jaw elements are carried in a jaw mount to be expandable by a tapered mandrel actuated by a cam connected with a pivoted handle carried on the tool body which also has a fixed handle extending therefrom, the arrangement being such that by manipulation of the pivoted handle, the mandrel is moved axially into and out of the jaw elements to expand the jaw elements, which have a complementary inner face, to in turn expand a tube end fitted over the jaw elements.
Tube expanders of the aforementioned type are well known and in this regard reference is made to Australian Patent Specification numbers 501,090 and 515,1591 Certain problems exist with this type of apparatus mainly due to the force required to expand the ends of tubes, such as copper tubes, and the need to have the expansion accurately controlled so that when for instance one end of the tube is to be expanded and the end of another tube fitted into it and brazed or the like, the fit shall be such that correct sealing of one end to the other will result and will be capable of withstanding the necessary pressures which need to be carried by tubes of this type.
A further problem with prior art devices is the requirement for fine tolerances during the manufacture of the tool, specifically the mandrel, the cam handle and the body. Furthermore, owing to wear, not infrequently the cam handle and/or the mandrel need replacement.
One object of the present invention is to provide an improved tube expander tool which is able to give very accurate adjustment of the expansion of the jaws.
3~3~
A further object is to provide a satisfactory type of cam on the movable handle and anti-Eric-tion assembly between the cam on the handle and the mandrel which will ensure tha-t the force required to move the mandrel forward is minimised.
A still further objec-t of this invention is to provide a tube expander, the manufacture of which is very much simplified and eliminates the need to maintain close tolerances in the production of the tool body.
Yet another object of this invention is to provide a tube expander which will enable wear to be adjusted out, and which has simple, inexpensive replacement parts rather than having to replace main component parts of the tool through wear.
~ccorclingly, the pre~ent invention is in a tool ~or expanding pipe or tube ends of the type comprising a tool body having a passageway provided therein, an axially movable mandrel located in the passageway and having a tapered end, jaw mounting means arranged to be coupled with respect to the tool body and comprising a plurality of expandable jaw elements which are mounted for radial displacement upon axial movement of the mandrel, the tool body having a fixed handle projecting therefrom and a pivotal lever arm carried thereon, the pivotal lever arm being provicled with a cam at or near its pivoted end, the arrangement being such that by manipulation of the lever arm, the cam co-acts with the mandrel to cause the mandrel to move axially into and out of the jaw elements to thereby expand same and to in turn expand a tube end fitted over the jaw elements, and is the 3~ improvement comprising a replaceable cam facing of wear-resistant material attached to the surface of said cam, ancl being engageable with the inner end of said mandrel with which the cam co-acts to cause the mandrel to move axially into and out of the jaw elements.
.~
~3~31D
Because the adjustable too.l head can be axially moved when the lock screw or similar device is released, the exact amount of expansion can be controlled by simply axially moving the head and then locking it when at the required extension which o~ course then governs the amount of expansion of the jaws, as -the taper on the end of the mandrel engages the inner faces of the jaws. Furthermore, the use of an adjustable head greatly simplifies the manufacture of the 10 tool in that the need for fine tolerances in the production of the tool body, cam handle and mandrel, is removed.
Preferably, the tool head comprises an axial hollow tail which engages neatly into the passageway in the body, the tail being adapted to be locked against axial movement when a selected position for the head has been reached by means of a lock screw or -the like, any form o:E locking being suitable to prevent axial movement when required. mhe tail is pre.~erably externally screw-threaded and threadably engages an internal screw thread - lZ~3~3~
in the passageway of the tool body.
The tail and the passageway in the tool body can be splined or otherwise arranged to prevent rotation of the head in relation to the body i:E this is required or where the body is made of a softer metal the aperture can be sleeved so that the sleeve engages the tail on the head.
The tool head preferably has a circular recess in the surface facing the end of the too:L body, and the body has an annular depending lip to engage into the recess so that there is a barrier to the ingress of foreign matter to the interengaging surfaces between the tail and the body.
Preferably, the head has a screw-threaded portion engageable with the jaw mount in which the jaw elements of the jaw assembly are housed and the jaw elements are locked to the jaw mount to prevent axial movement in relation thereto but are free to move radially to allow the jaws to be expanded.
In order to more fully explain the present invention, an embodiment is described hereunder in some further detail with reference to and is illustrated in the accompanying drawings in which:
~ FIG. 1 is a perspective view of a tube expander : 25 showing an expanding jaw assembly attached thereto, FIG. 2 is a exploded perspective view of the tool holder shown in Fig. l; and FIG. 3 is a part longitudinal sectional view of the tube expander of this invention (the closed position of the pivoted lever arm being shown in dotted lines).
In this embodiment, a tube expander assembly 10 comprises a tool body 11 formed with an axial passageway 12 extending therethrough, an adjustable tool head 13 coaxially aligned with the tool body 11, the tool head ~3~3~
,. . .
13 having an axial bore 16 extending therethrough, a mandrel 17 axially displaceable in the bore 16, and an expandable jaw assembly 18 carried on the lower end of the tool head 13 coaxially therewith. The expanding jaw assembly 18 operates in accordance with known art and does not form any part of the present invention.
The tool body 11 is provided with a fixed laterally projecting handle 20 which is provided at its end with a handle grip 21. The upper end of the tool body ll is formed to have a pair of upwardly projecting spaced apart lugs 22 between which a pivotal lever arm 25 is mounted by means of a transverse pivot pin 26 which passes through the lever arm 25 and the lugs 22. The lever arm 25 can be swung in the direction of arrow 27 shown in Fig. 3 from an open position shown in full lines through to a closed position shown in dotted lines in which the lever arm 25 is approximately parallelly aligned with the fixed handle 20.
The lever arm 25 is provided with a cam 28 at its inner end, the cam 28 having an arcuate-shaped peripheral cam surface 30, the cam 28 joining the lever arm 25 through a pair of opposed shoulders 31. A hardened spring steel cam facing 32 clips on to the cam 28 and engages the peripheral surface 30. The clip 32 comprises an arcuate-shaped portion which terminates at its ends in inturned flanges 35 whereby the clip 32 is able to be readily removed and replaced through resilient engagement with the cam 28.
The upper end of the mandrel 17 is provided with an enlarged head 36, whilst the lower end of the mandrel 17 comprises a tapered portion 37 which extends through the tool head 13 and into the jaw assembly 18. ~s the pivot pin 25 is mounted eccentrically in relation to the cam surface 30, upon actuation of the lever arm 25, the tapered mandrel 17 is axially displaced and moves into 3~
the jaw assembly 18. Unlike prior art devices where the upper end face of the mandrel engages directly against a co-operable cam face, in this embodiment, the enlarged head 36 of the mandrel 17 is provided with a transverse recess 39 in which is located an antifriction roller 40 which is arranged to engage the cam facing 32 to reduce friction during the time that the cam facing 32 is in engagement with the mandrel 17 to move it axially into the jaw assembly 18.
The tool head 13, in this embodiment, comprises a small diameter axially inwardly projecting tail 41 which has an externally screw threaded portion 44 which threadably engages the internally threaded passageway 12 of the tool body 11, and a large diameter externally screw threaded portion,45 which is arranged to be screw threaded to the sleeve or collar 47 of the jaw assembly 18. The screw threaded portions 44, 45 are separated by an annular flange 48, the diameter which is larger than the outer diameter of the tool body 11. The axially inner face 49 of the flange 49 is provided with a circular recess 50 into which engages an annular depending lip 51 projecting from the end face of the tool body 11. With the tool head 13 screwed to the tool body 11, the lip 51 engages within the recess 50 and forms a barrier to the ingress of foreign matter to the interengaging surfaces .
between the tail 41 of the head 13 and the inner surfaces of the tool body 11.
In order to lock the tool head 13 against axial movement, when a selected position for the head has been reached, there is provided a lock screw 52 which threadably engages in a radial aperture 54 formed in the wall of the body 11, the lock screw 52 when in its locked condition, engages against an unthreaded portion of the tail 41 adjacent its inner end.
Construction of the jaw assembly 1~ is in accord 3(;~
with known art and comprises a self-contained set of radially expandable jaw elements 55 which are ~ounted in the circular collar or sleeve 47 in such a way that the segments can radially expand but are constrained against any axial movement. The jaw elements 55 are shaped so as to form a conical recess into which the tapered end of the mandrel 17 engages in order to effect the expansion of the jaw elements 55.
In this ~mbodiment, the pivotal lever arm 25 is formed of cast aluminium which contrasts with prior art - devices wherein the movable handle is normally of hardened steel material. The replaceable hardened steel cam facing clip 32 can be readily removed and replaced in the event of any wear - instead of the entire lever arm as is required in prior art units. Furthermore, the antifriction roller, preferably of hardened steel, significantly reduces friction between the clip 32 and the mandrel 17 and thereby minimises wear between the parts, but still further the antifriction roller permits the device to be more readily actuated.
The jaw assembly of course can be variable in dimension and for instance, the depth of the jaws can be chanyed to allow the device to be used in tubes of difference diameters and at the same time the actual expansion of such tubes is variable by loosening the lock screw or similar device and positioning the tool head axially in relation to the tool body to select the required limit to which the jaws can be expanded.
It will be realised from the foregoing that a simple and effective form of tube expander is provided and one which incorporates significant improvements in comparison to known prior art de.ices.
.~
This invention relates to improvements in and to tools for expanding the ends of tubes/pipes, and in particular it relates to tube expanders of the type in which a plurality of jaw elements are carried in a jaw mount to be expandable by a tapered mandrel actuated by a cam connected with a pivoted handle carried on the tool body which also has a fixed handle extending therefrom, the arrangement being such that by manipulation of the pivoted handle, the mandrel is moved axially into and out of the jaw elements to expand the jaw elements, which have a complementary inner face, to in turn expand a tube end fitted over the jaw elements.
Tube expanders of the aforementioned type are well known and in this regard reference is made to Australian Patent Specification numbers 501,090 and 515,1591 Certain problems exist with this type of apparatus mainly due to the force required to expand the ends of tubes, such as copper tubes, and the need to have the expansion accurately controlled so that when for instance one end of the tube is to be expanded and the end of another tube fitted into it and brazed or the like, the fit shall be such that correct sealing of one end to the other will result and will be capable of withstanding the necessary pressures which need to be carried by tubes of this type.
A further problem with prior art devices is the requirement for fine tolerances during the manufacture of the tool, specifically the mandrel, the cam handle and the body. Furthermore, owing to wear, not infrequently the cam handle and/or the mandrel need replacement.
One object of the present invention is to provide an improved tube expander tool which is able to give very accurate adjustment of the expansion of the jaws.
3~3~
A further object is to provide a satisfactory type of cam on the movable handle and anti-Eric-tion assembly between the cam on the handle and the mandrel which will ensure tha-t the force required to move the mandrel forward is minimised.
A still further objec-t of this invention is to provide a tube expander, the manufacture of which is very much simplified and eliminates the need to maintain close tolerances in the production of the tool body.
Yet another object of this invention is to provide a tube expander which will enable wear to be adjusted out, and which has simple, inexpensive replacement parts rather than having to replace main component parts of the tool through wear.
~ccorclingly, the pre~ent invention is in a tool ~or expanding pipe or tube ends of the type comprising a tool body having a passageway provided therein, an axially movable mandrel located in the passageway and having a tapered end, jaw mounting means arranged to be coupled with respect to the tool body and comprising a plurality of expandable jaw elements which are mounted for radial displacement upon axial movement of the mandrel, the tool body having a fixed handle projecting therefrom and a pivotal lever arm carried thereon, the pivotal lever arm being provicled with a cam at or near its pivoted end, the arrangement being such that by manipulation of the lever arm, the cam co-acts with the mandrel to cause the mandrel to move axially into and out of the jaw elements to thereby expand same and to in turn expand a tube end fitted over the jaw elements, and is the 3~ improvement comprising a replaceable cam facing of wear-resistant material attached to the surface of said cam, ancl being engageable with the inner end of said mandrel with which the cam co-acts to cause the mandrel to move axially into and out of the jaw elements.
.~
~3~31D
Because the adjustable too.l head can be axially moved when the lock screw or similar device is released, the exact amount of expansion can be controlled by simply axially moving the head and then locking it when at the required extension which o~ course then governs the amount of expansion of the jaws, as -the taper on the end of the mandrel engages the inner faces of the jaws. Furthermore, the use of an adjustable head greatly simplifies the manufacture of the 10 tool in that the need for fine tolerances in the production of the tool body, cam handle and mandrel, is removed.
Preferably, the tool head comprises an axial hollow tail which engages neatly into the passageway in the body, the tail being adapted to be locked against axial movement when a selected position for the head has been reached by means of a lock screw or -the like, any form o:E locking being suitable to prevent axial movement when required. mhe tail is pre.~erably externally screw-threaded and threadably engages an internal screw thread - lZ~3~3~
in the passageway of the tool body.
The tail and the passageway in the tool body can be splined or otherwise arranged to prevent rotation of the head in relation to the body i:E this is required or where the body is made of a softer metal the aperture can be sleeved so that the sleeve engages the tail on the head.
The tool head preferably has a circular recess in the surface facing the end of the too:L body, and the body has an annular depending lip to engage into the recess so that there is a barrier to the ingress of foreign matter to the interengaging surfaces between the tail and the body.
Preferably, the head has a screw-threaded portion engageable with the jaw mount in which the jaw elements of the jaw assembly are housed and the jaw elements are locked to the jaw mount to prevent axial movement in relation thereto but are free to move radially to allow the jaws to be expanded.
In order to more fully explain the present invention, an embodiment is described hereunder in some further detail with reference to and is illustrated in the accompanying drawings in which:
~ FIG. 1 is a perspective view of a tube expander : 25 showing an expanding jaw assembly attached thereto, FIG. 2 is a exploded perspective view of the tool holder shown in Fig. l; and FIG. 3 is a part longitudinal sectional view of the tube expander of this invention (the closed position of the pivoted lever arm being shown in dotted lines).
In this embodiment, a tube expander assembly 10 comprises a tool body 11 formed with an axial passageway 12 extending therethrough, an adjustable tool head 13 coaxially aligned with the tool body 11, the tool head ~3~3~
,. . .
13 having an axial bore 16 extending therethrough, a mandrel 17 axially displaceable in the bore 16, and an expandable jaw assembly 18 carried on the lower end of the tool head 13 coaxially therewith. The expanding jaw assembly 18 operates in accordance with known art and does not form any part of the present invention.
The tool body 11 is provided with a fixed laterally projecting handle 20 which is provided at its end with a handle grip 21. The upper end of the tool body ll is formed to have a pair of upwardly projecting spaced apart lugs 22 between which a pivotal lever arm 25 is mounted by means of a transverse pivot pin 26 which passes through the lever arm 25 and the lugs 22. The lever arm 25 can be swung in the direction of arrow 27 shown in Fig. 3 from an open position shown in full lines through to a closed position shown in dotted lines in which the lever arm 25 is approximately parallelly aligned with the fixed handle 20.
The lever arm 25 is provided with a cam 28 at its inner end, the cam 28 having an arcuate-shaped peripheral cam surface 30, the cam 28 joining the lever arm 25 through a pair of opposed shoulders 31. A hardened spring steel cam facing 32 clips on to the cam 28 and engages the peripheral surface 30. The clip 32 comprises an arcuate-shaped portion which terminates at its ends in inturned flanges 35 whereby the clip 32 is able to be readily removed and replaced through resilient engagement with the cam 28.
The upper end of the mandrel 17 is provided with an enlarged head 36, whilst the lower end of the mandrel 17 comprises a tapered portion 37 which extends through the tool head 13 and into the jaw assembly 18. ~s the pivot pin 25 is mounted eccentrically in relation to the cam surface 30, upon actuation of the lever arm 25, the tapered mandrel 17 is axially displaced and moves into 3~
the jaw assembly 18. Unlike prior art devices where the upper end face of the mandrel engages directly against a co-operable cam face, in this embodiment, the enlarged head 36 of the mandrel 17 is provided with a transverse recess 39 in which is located an antifriction roller 40 which is arranged to engage the cam facing 32 to reduce friction during the time that the cam facing 32 is in engagement with the mandrel 17 to move it axially into the jaw assembly 18.
The tool head 13, in this embodiment, comprises a small diameter axially inwardly projecting tail 41 which has an externally screw threaded portion 44 which threadably engages the internally threaded passageway 12 of the tool body 11, and a large diameter externally screw threaded portion,45 which is arranged to be screw threaded to the sleeve or collar 47 of the jaw assembly 18. The screw threaded portions 44, 45 are separated by an annular flange 48, the diameter which is larger than the outer diameter of the tool body 11. The axially inner face 49 of the flange 49 is provided with a circular recess 50 into which engages an annular depending lip 51 projecting from the end face of the tool body 11. With the tool head 13 screwed to the tool body 11, the lip 51 engages within the recess 50 and forms a barrier to the ingress of foreign matter to the interengaging surfaces .
between the tail 41 of the head 13 and the inner surfaces of the tool body 11.
In order to lock the tool head 13 against axial movement, when a selected position for the head has been reached, there is provided a lock screw 52 which threadably engages in a radial aperture 54 formed in the wall of the body 11, the lock screw 52 when in its locked condition, engages against an unthreaded portion of the tail 41 adjacent its inner end.
Construction of the jaw assembly 1~ is in accord 3(;~
with known art and comprises a self-contained set of radially expandable jaw elements 55 which are ~ounted in the circular collar or sleeve 47 in such a way that the segments can radially expand but are constrained against any axial movement. The jaw elements 55 are shaped so as to form a conical recess into which the tapered end of the mandrel 17 engages in order to effect the expansion of the jaw elements 55.
In this ~mbodiment, the pivotal lever arm 25 is formed of cast aluminium which contrasts with prior art - devices wherein the movable handle is normally of hardened steel material. The replaceable hardened steel cam facing clip 32 can be readily removed and replaced in the event of any wear - instead of the entire lever arm as is required in prior art units. Furthermore, the antifriction roller, preferably of hardened steel, significantly reduces friction between the clip 32 and the mandrel 17 and thereby minimises wear between the parts, but still further the antifriction roller permits the device to be more readily actuated.
The jaw assembly of course can be variable in dimension and for instance, the depth of the jaws can be chanyed to allow the device to be used in tubes of difference diameters and at the same time the actual expansion of such tubes is variable by loosening the lock screw or similar device and positioning the tool head axially in relation to the tool body to select the required limit to which the jaws can be expanded.
It will be realised from the foregoing that a simple and effective form of tube expander is provided and one which incorporates significant improvements in comparison to known prior art de.ices.
.~
Claims (5)
1. In a tool for expanding pipe or tube ends of the type comprising a tool body having a passageway provided therein, an axially movable mandrel located in the passageway and having a tapered end, jaw mounting means arranged to be coupled with respect to the tool body and comprising a plurality of expandable jaw elements which are mounted for radial displacement upon axial movement of the mandrel, the tool body having a fixed handle projecting therefrom and a pivotal lever arm carried thereon, -the pivotal lever arm being provided with a cam at or near its pivoted end, the arrangement being such that by manipulation of the lever arm, the cam co-acts with the mandrel to cause the mandrel to move axially into and out of the jaw elements to thereby expand same and to in turn expand a tube end fitted over the jaw elements, the improvement comprising a replaceable cam facing of wear-resistant material attached to the surface of said cam, and being engageable with the inner end of said mandrel with which the cam co-acts to cause the mandrel to move axially into and out of the jaw elements.
2. In a tool according to claim 1 wherein the inner end of said mandrel is provided with a recess in which is located an antifriction roller for rollingly engaging the surface of said cam facing.
3. In a tool according to claim 1 wherein the cam facing is formed as an arcuate shaped resilient clip, said cam on the lever arm being correspondingly shaped, the cam facing being arranged to engage said cam with a snap-fit.
4. In a tool according to claim 3 wherein the lever arm is of cast aluminum and the cam facing is of hardened steel.
5. In a tool according to claim 1 wherein the tool body is provided with a pair of laterally aligned upwardly projecting spaced apart lugs, said lever arm being pivotally supported between said lugs by means of a pivot pin passing through the lever arm and the lugs.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AUPH6945 | 1986-07-16 | ||
| AUPH694586 | 1986-07-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1293430C true CA1293430C (en) | 1991-12-24 |
Family
ID=3771714
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000542236A Expired - Fee Related CA1293430C (en) | 1986-07-16 | 1987-07-15 | Tube expanders |
Country Status (7)
| Country | Link |
|---|---|
| AU (1) | AU603596B2 (en) |
| BE (1) | BE1001949A3 (en) |
| CA (1) | CA1293430C (en) |
| FR (1) | FR2601605B1 (en) |
| GB (1) | GB2203078B (en) |
| SE (1) | SE8800986D0 (en) |
| WO (1) | WO1988000503A1 (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4017404C1 (en) * | 1990-05-30 | 1991-10-31 | Rothenberger Werkzeuge-Maschinen Gmbh, 6000 Frankfurt, De | |
| CA2024394A1 (en) * | 1989-09-14 | 1991-03-15 | Velte Karl-Heinz | Expansion tool for hollow working parts |
| US5090230A (en) * | 1991-04-02 | 1992-02-25 | Kauno Koskinen Ky | Pipe expanding pliers |
| DE4446506A1 (en) * | 1994-12-25 | 1996-06-27 | Rothenberger Werkzeuge Masch | Device for expanding hollow bodies |
| AU2011201540B2 (en) | 2010-04-06 | 2013-10-31 | Milwaukee Electric Tool Corporation | Pex expanding tool |
| US9914260B2 (en) | 2014-06-20 | 2018-03-13 | Milwaukee Electric Tool Corporation | PEX expanding tool |
| US9862137B2 (en) | 2015-04-20 | 2018-01-09 | Milwaukee Electric Tool Corporation | PEX expanding tool |
| US10000007B2 (en) | 2015-06-10 | 2018-06-19 | Milwaukee Electric Tool Corporation | PEX expanding tool |
| CN212653901U (en) | 2019-02-20 | 2021-03-05 | 米沃奇电动工具公司 | Expansion tool, working element for expanding a pipe, fitting, mandrel assembly and pipe expansion system |
| CN212097511U (en) | 2019-02-20 | 2020-12-08 | 米沃奇电动工具公司 | PEX expanding tool |
| CN214726466U (en) | 2020-11-27 | 2021-11-16 | 米沃奇电动工具公司 | Expansion tool |
| WO2022217092A1 (en) | 2021-04-09 | 2022-10-13 | Milwaukee Electric Tool Corporation | Expansion tool |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1581127A (en) * | 1968-07-25 | 1969-09-12 | ||
| DE2505915A1 (en) * | 1975-02-13 | 1976-08-26 | Rothenberger Schweisstech | DEVICE FOR EXPANSION OF PIPE ENDS |
| DE2552607C2 (en) * | 1975-11-24 | 1985-08-01 | Rothenberger GmbH & Co Werkzeuge-Maschinen KG, 6000 Frankfurt | Hand tool for expanding pipe ends |
| DE2616324A1 (en) * | 1976-04-14 | 1977-10-27 | Kabel Metallwerke Ghh | Accurate enlargement of pipe bores to set dias. - uses split plug separated by conical arbor and levers as on pliers |
| DE2654102C2 (en) * | 1976-11-29 | 1984-01-05 | Rothenberger GmbH & Co Werkzeuge-Maschinen KG, 6000 Frankfurt | Expansion head for pipe expanding devices with exchangeable expansion jaws |
| JPS53102262A (en) * | 1977-02-04 | 1978-09-06 | Rothenberger Gmbh Co | Expansion jaw holder for exchangeable jaw assembly of pipe expanding device |
-
1987
- 1987-07-15 GB GB8807140A patent/GB2203078B/en not_active Expired - Fee Related
- 1987-07-15 AU AU77038/87A patent/AU603596B2/en not_active Ceased
- 1987-07-15 WO PCT/AU1987/000219 patent/WO1988000503A1/en unknown
- 1987-07-15 CA CA000542236A patent/CA1293430C/en not_active Expired - Fee Related
- 1987-07-16 FR FR8710253A patent/FR2601605B1/en not_active Expired - Fee Related
- 1987-07-16 BE BE8700788A patent/BE1001949A3/en not_active IP Right Cessation
-
1988
- 1988-03-17 SE SE8800986A patent/SE8800986D0/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| SE8800986D0 (en) | 1988-03-17 |
| AU603596B2 (en) | 1990-11-22 |
| WO1988000503A1 (en) | 1988-01-28 |
| GB8807140D0 (en) | 1988-05-25 |
| FR2601605B1 (en) | 1991-01-04 |
| FR2601605A1 (en) | 1988-01-22 |
| BE1001949A3 (en) | 1990-04-24 |
| GB2203078A (en) | 1988-10-12 |
| AU7703887A (en) | 1988-02-10 |
| GB2203078B (en) | 1990-09-19 |
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