GB2496448A - Improvements to mobile pipe welding devices - Google Patents

Improvements to mobile pipe welding devices Download PDF

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Publication number
GB2496448A
GB2496448A GB1119606.0A GB201119606A GB2496448A GB 2496448 A GB2496448 A GB 2496448A GB 201119606 A GB201119606 A GB 201119606A GB 2496448 A GB2496448 A GB 2496448A
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GB
United Kingdom
Prior art keywords
welding device
mobile welding
drive
idle
idle wheel
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Granted
Application number
GB1119606.0A
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GB2496448B8 (en
GB2496448A8 (en
GB201119606D0 (en
GB2496448B (en
Inventor
Michael Berkley Penny
Roger George William Cooper
Dominick Doyle
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Gridweld Welding Systems Ltd
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Gridweld Welding Systems Ltd
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Application filed by Gridweld Welding Systems Ltd filed Critical Gridweld Welding Systems Ltd
Priority to GB1119606.0A priority Critical patent/GB2496448B8/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
    • B23K37/02—Carriages for supporting the welding or cutting element
    • B23K37/0211—Carriages for supporting the welding or cutting element travelling on a guide member, e.g. rail, track
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
    • B23K37/02—Carriages for supporting the welding or cutting element
    • B23K37/0211—Carriages for supporting the welding or cutting element travelling on a guide member, e.g. rail, track
    • B23K37/0217—Carriages for supporting the welding or cutting element travelling on a guide member, e.g. rail, track the guide member being fixed to the workpiece

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Butt Welding And Welding Of Specific Article (AREA)

Abstract

5 A mobile welding device includes travel motor 1 which features a combined motor and gear box assembly extending to a combined drive and idle wheel 17, the position of which is controlled by a safety locking lever 18. The same safety locking lever can move the combined drive and idle wheel 17 into three positions; idle, clamp and drive. Pushing the top flange down of the aforementioned travel motor engages the motor and gear 10 box to the said single drive wheel, the grooves of which engage on the rear perimeter edges of a circumferential metal guide band for operation of the aforesaid mobile welding device. Lifting the said flange up disengages the said drive wheel to idle. A toggle switch 3 may be fitted to an electronic control box 4 programmed with software to enable reversing of the travel motor 1 to allow butt welding to be undertaken on both sides of a typical pipe without 15 disturbing any original set up. Location plates 9 and 10 are preferably attached to main body 22, using alignment plate 28, and feature radiused slots for attachment means to arms 11 and 12, the idle wheels of which engage with the front perimeter edges of the aforementioned circumferential metal guide band.

Description

I
Improvements to mobile pipe welding devices The present invention relates generally to the automated method of accurately welding together identical ends of curved metal sections. The curved metal sections may be circular, elliptical or any other curvilinear cross section which starts and finishes at the same point.
Typically termed pipes, they are identified as tubular section or hollow cylinder, used mainly to convey substances which can flow -liquids and gases (fluids), slurries, powders, masses of small solids and the like.
Whilst also used for structural applications the piping in general which the present invention relates to is usually specified by a nominal diameter with a constant outside diameter and a schedule that defines the thickness implying a leve} of rigidity and permanence.
Welding such identical pipe ends together has been commonplace for many years. There are various methods which support and accurately line up the ends of pipes such that the perimeters are ready for butt welding from a skilled welder. However, much as the preparatory work for welding such pipes together is standard practice there has been considerable innovation in automating the welding activity itself, due to the need for accuracy, speed and cost reduction through the application of mobile welding devices which are attached to metal bands around pipes in various ways and travel around their perimeters welding as they move.
However there are shortcomings in the engineering of such conventional mobile welding devices in many respects. For example, there is often backlash in the method of controlling the oscillators in the welding torch through the engineering solution of a worm and worm-wheel. Similarly, the motor gear box and two spur wheels and worm wheels suffer from excessive wear resulting in high maintenance. Feeders which control the wire to the oscillator torch use the same engineering approach and are weak points requiring high s maintenance.
Furthermore, where existing mobile devices utilise slotted and other designs of metal guide bands which are attached to the circumference of pipes and act as a track for the mobile welding device, there are often three idle wheels and a drive wheel driven off slots in the flat io face of the band with the disadvantage that teeth jump in the weld at the join, because of the difficulty in lining up the slots in the band where there is the inevitable overlap. A further disadvantage of driving off slots in such bands is that the join in the circumference disrupts the drive wheel every 360 degree rotation.
In automatic pipe welding as discussed above there is often the need to change direction from clockwise to counter-clockwise. Most conventional mobile welding devices are handed', meaning they are unable to change direction. The change in their direction can only be achieved by removing the drive wheel assembly and re-mounting it on the other side of the mobile welding device; a process which is both time and cost consuming. In addition, after a breakdown, a typical spare machine cannot be immediately commissioned for clock-wise or counter-clockwise application, spares needing to be configured to either clockwise or counter-clockwise rotation together with reprogramming of the electronic controls. From a commercial angle, including downtime, a one-handed machine is an expensive impediment, the costs for which, hitherto, could only normally be absorbed by a large organisation. But nowadays all organisations are aware of the need to streamline costs particularly using technology, wherever this can be done.
Furthermore, in certain mobile welding devices hard wire cannot be used for welding due to the machine jumpin9' over the slots in the circumference guide band at the join in the overlap mentioned earlier. To operate certain mobile welding devices an idle wheel S underneath the assembly needs to be engaged by pulling back against a spring by hand. By all accounts to achieve this requires hard manual effort.
Referring now to the torch system, on conventional machines there are often two 0' rings and a ceramic cup, which is brittle. As a result of this design the sub assembly set is subject to frequent breakage when in continuous operation and needs the replacement of typically sets per day. In 2011 cost terms this equates to £30.00. not counting the cost for lost downtime and labour to repair.
Another problem in conventional machines of this type resides in the method of locking the carriage legs at an angle. The use of grub screws sited close together results in their becoming worn and blending with each other over time giving rise to unacceptable tolerances and causing sloppy travel of the carriage. Furthermore in another design the use of male indents fanning out from support centres in the machined or cast metal body matching female indents in the carriage legs also gives rise to unnecessary wear and tear.
It is an object of the present invention to provide improved oscillation control in the welding torch.
It is another object of the present invention to provide improved reliability by combining the travel motor and gear box.
It is an additional object of the present invention to provide quick and cost-effective changeover from clockwise to counter-clockwise motion and vice versa of the mobile welding device.
S
It is a further object of the present invention to provide improved travel and grip of the mobile welding device around the metal guide band.
It is a still further object of the present invention to improve the design of the trailing guide arms through the adoption of location plates and alignment plates to improve accuracy and speed in setting up correct angles of travel for the free-wheel guides, to increase reliability and to reduce wear and tear is It is a yet further object of the present invention to provide a method of controlling the tensioning of the combined dnve and idle wheel engagement to the metal guide band.
In a preferred embodiment, according to a first aspect of the invention there is provided a mobile welding device having a machined or cast metal body which has attached to it:- -a combined travel motor and gear box centrally located which is connected to a combined drive and idle wheel able to be instantly reversed in direction from clockwise to counter clockwise and vice versa to enable automatic butt welding of pipes on both sides without any disturbance to the welding process.
-two arms each with a free wheel guide fitted on the end to engage with a common metal guide band fitted around the circumference of one of the pipes to facilitate engagement of the free wheel guides on a perimeter edge and a combined drive and idle wheel extending from the combined motor and gear box; said drive and idle wheel positioned on the other perimeter edge of the band.
S
-specially designed location plates which, together with their respective alignment plates allow the angles of the two said arms to accurately match the radius of any pipe which is set up to be butt welded.
ii) -a spring controlled tensioning system with a locking lever for the combined drive/idle wheel which gauges the grip of all three said wheels on the front and rear rims of the metal guide band forming a secure connection; the aforementioned tensioning system preventing slippage, allowing smooth 360 degrees perimeter travel of the mobile welding device when in operation and facilitating both hard and flux core welding.
-a spool holder for carrying welding wire featuring a spring collar tension/friction adjustment with a delay key in the central barrel which gives precise setting of tension to enable smooth delivery of the said wire; the operator adjusting tension as required.
-a proprietary wire feeder comprising a commercially available combined motor and gear box assembly. which gives greater reliability than conventional bespoke assemblies by removing the need for spur gears, worm wheels and greasing.
-a commercially available stepper motor with low backlash which overcomes typical problems associated with spur gears and worm wheels utilised in some conventional mobile pipe welding machines, co-ordinates the movement of the torch and facilitates better welds than bespoke stepper motors used on conventional machines.
-an electronic control box fitted with bespoke software which has been configured to enable S clockwise/counter clockwise changeover and vice versa of the motor through a reversible toggle switch to save on the need for stocking spare electronic control boxes and to facilitate quick changeovers to enable virtually continuous welding on both sides of a pipe, thus saving time and cost In addition a commercially available torch assembly is used which reduces the use of gas due to its design compared with conventional torches and replaces the use of ceramic cups, common on some machines, with an insulated cup to prevent arcing on the pipe in operation. The central location of the torch in the main body enables welding on both sides ofa pipe.
In order that the nature of the invention may be clearly understood an embodiment will now be described, by way of example only, with reference to the accompanying drawings in which: Figure 1 depicts a front elevation view of a mobile, welding device showing a travel motor, a reverse toggle switch attached to an electronic control box, a stepper motor, a spool holder, a torch and adjustable arms at the ends of which are fitted twin groove type conventional wheels in accordance with aspects of the present invention.
Figure 2 depicts an underside view of a mobile welding device showing a combined drive and idle wheel assembly, its associated safety locking lever for adjustment and a pair of idle wheels secured to the ends of adjustable arms which are fitted to location plates whith are in turn attached to a machined or cast metal body in accordance with aspects of the present invention.
Figure 3 depicts an exploded view of a sub assembly of one of the aforementioned location plates, a machined or cast metal body of a mobile welding device to which it is attached and a temporary alignment plate which sets up the correct operational angle for the said location plate in accordance with aspects of the present invention.
io Figure 4 depicts an exploded view of another embodiment featuring an alignment plate in accordance with aspects of the present invention.
Figure 5 depicts an exploded view of another embodiment featuring a different alignment plate which is a template for a certain diameter pipe wherein no measurements are needed to calculate the angle of the two support arms to engage accurately in the circumferential metal guide band in accordance with aspects of the present invention.
In figure 1 travel motor I provides the drive for the mobile welding device via a combined drive and idle wheel assembly 17 attached to the rear of the metal guide band 2.
Travel motor 1 houses a combined motor and gear box, featuring inside the housing a splined shaft engaging with the motor when the top flange of the travel motor I is pushed down. When the top flange of the housing is pulled up the motor disengages. Within the motor housing a spring-loaded ball bearing sits in line with a groove in an outer sheath, with radial grooves in an inner sheath. The aforementioned splined shaft is connected at the base to a combined drive and idle wheel assembly 17 v which features a double groove which engages with the rear edges of the circumference of a metal guide band 2 and its overlap thus facilitating smooth 360 degree welding.
Reverse toggle switch 3 is connected to electronic control box 4 The bespoke circuitry of the S aforementioned electronic control box enables rapid reversible change of direction of travel motor 1 facilitating clockwise and anti-clockwise rotation of the mobile welding device creating continuous welding around the pipes 16 while in situ Stepper motor 5 provides reduced backlash, resulting in better welds, through installing proprietary parts and co-ordinates the movement of proprietary torch welding head 6.
Push button 21 when depressed can unlock the alignment rotor for repositioning of the torch welding head 6 and when released activates the rotor for welding.
is Spool holder 7 features two nylon parts and a central screw which turns up and down to increase and release tension correspondingly via a cone shaped adjuster to control the friction release of the weld wire when it is being dispensed from the spool holder for the welding procest Alignment plates 9 and 10 adjust the angle of arms 11 and 12 via an attachment means, typically flange head bolts 26 positioned through each pivot's diameter which pinches the said arms to precisely engage idle wheels 13 and 14 on the front rim of a common metal circumferential guide band 2.
In figure 2 combined drive and idle wheel assembly 17 is shown in the first, open position to enable the mobile welding device to be lined upon a circumferential metal guide band 2 together with idle wheels 13 and 14. By moving handle locking lever 18 against spring 19 through 90 degrees to the second position, drive wheel 17 is securely clamped and engages with the metal guide band 2 in the freewheel position to prevent the mobile welding device S falling off. A further 180 degrees movement of the said locking lever for the third position engages the aforementioned drive wheel on the rear edge of metal band 2, which faces away from the edges of the pipes to be welded together 16. When released, safety locking lever 20 prevents accidental disengagement of the drive wheel's idle mode returning to the first position, which, if it were not so, would result in the mobile welding device falling off the io aforementioned metal guide band.
Two common idle wheels 13 and 14 are formed of two adjacent grooves; one to engage the front edge of the circumferential metal guide band and the other to engage the edge of the overlap of the said metal guide band. Each of the aforementioned idle wheels is is attached to arms 11 and 12 which provide radial adjustment and locking to alignment plates 9 and 10 respectively to accommodate any radius of pipe to be welded.
In figureS an aforementioned idle wheel 13 is attached to a support arm 11, one of which is shown, the other being of a mirror image, as depicted in figure 1. Arm 11 is attached to location plate 9, which pivots about and is secured by central flange bolt 26 which pinches the aforementioned location plate to the said arm when being screwed into the main body 22 and secures a desired angle for welding in conjunction with bolt 24 which has opportunity for a wide range of travel within the radiused slot 25 when the operational angle of 11 is being assessed When setting up the correct operational angle for arm 11, temporary alignment template 28 is offered up to enable central flange bolt 26 to friction fit within the central hole.
Location pins 27 hold secure the desired position to enable location pin 28 to be fitted into the appropriate alignment hole, from a plurality of holes in the aforementioned temporary alignment plate; the positions of the said plurality of holes calculated to match the radius of every typical pipe which is normally butt welded. Such alignment holes may have featured S stamped into the metal next to them the diameter of the pipes to which they refer. Finally central flange bolt 26 is tightened securely and the temporary alignment template 28 is removed in order to be reversed and used on the aforementioned mirror-image sub assembly on the other side to complete the mobile welding device set-up.
In figure 4 location plate 21 is shown with holes which are radiused around a central hinge point, the holes positioned in such a manner that small increments in distance are achieved through offsetting the holes in a plurality of radii.
In figure 5 location template 23 is shown connected to a support arm 11 offering a preset angle for the support arms when welding a certain diameter pipe, thus enabling rapid setup.
It will be appreciated by those skilled in the art that any number of combinations of the aforementioned features and/or those shown in the appended drawings provide clear advantages over the prior art and are therefore within the scope of the invention described herein. The foregoing description details certain preferred embodiments of the present invention and describes the best mode contemplated. It will be appreciated, however, that changes may be made in the details of construction and the configuration of components without departing from the spirit and scope of the disclosure. Therefore, the description provided herein is to be considered exemplary, rather than limiting, and the true scope of the invention is that defined by the following claims and the full range of equivalency to which each element thereof is entitled.

Claims (1)

  1. <claim-text>Claims 1 A mobile welding device comprising; a travel motor with reversible drive with a means to engage and disengage the said drive; a combined drive and idle wheel which can be set into several positions by a safety locking lever which configures the fitting, connection and drive engagement of the said combined drive and idle wheel on the edges of a circumferential metal guide band attached to a pipe of any radius which is positioned to be butt welded to an identical pipe; a pair of mirror-image alignment plates which facilitate the radial adjustment of an attached pair of arms, the wheels on the ends of which engage onto the opposite edges of the aforementioned circumferential metal guide band which is attached to the aforementioned pipe.</claim-text> <claim-text>2 A mobile welding device according to claim 1 in which the travel motor is centrally positioned.</claim-text> <claim-text>3 A mobile welding device according to claim 1 in which the top flange of the travel motor when pushed down locks to engage the drive.</claim-text> <claim-text>4 A mobile welding device according to claim 1 in which the top flange of the travel motor when pulled up disengages the drive.A mobile welding device according to claim 1 in which the travel motor is reversible 6 A mobile welding device according to claim 1 in which the travel motor is controlled by electronics and is reversible via a toggle switch.7 A mobile welding device according to claim I which features a combined drive and idle wheel.8 A mobile welding device according to claim 6 in which the combined drive and idle wheel has three positions.S 9 A mobile welding device according to claim 7 in which the combined drive and idle wheel position can be; open -for attachment to and removal from a circumferential metal band.A mobile welding device according to claim 7 in which the combined drive and idle wheel position can be idle -for clamping onto the edge of a circumferential metal band preventing accidental disengagement which would result in the mobile welding device falling away.11 A mobile welding device according to claim 7 in which the combined drive and idle wheel position can be drive -for controlling the tensioning of engagement to the edge of a circumferential metal band during the welding process.12 A mobile welding device according to claim 8 in which a safety locking lever controls the positions of the combined drive and idle wheel.13 A mobile welding device according to claim 9 in which the positions of the safety locking lever can be set at 90 degree increments.14 A mobile welding device according to claim I in which mirror-image location plates are attached in a fixed position.A mobile welding device according to claim I in which arms, fitted with common grooved free wheels on the end, are attached and secured at a suitable angle to the mirror-image location plates in order to engage the opposite edges to claim 10 of the perimeter of a circumferential metal guide band of any typical radius.S16 A mobile welding device according to claim 1 in which a temporary alignment template is calibrated with a plurality of holes which are radiused about a central flange bolt; the said hole positions calculated to match the different diameters of typical pipes which are buff welded.17 A mobile welding device according to claim 16 in which a temporary alignment plate is offered up to the outside of a location plate to determine correct operational angle of a support arm to enable its idle wheel to run smoothly along the perimeter edge of a typical pipe which can be butt welded. is18 A mobile welding device according to claim 16 in which the temporary alignment plate is removed and taken to the other side of the said mobile welding device and reversed to fit over the other location plate to set the angle of the other support arm.19 A mobile welding device according to claim 1 and both preceding claims in which both support arms, having been set in the correct positions by the aforementioned temporary alignment plate, facilitate accurate engagement of their respective idle wheels around the circumference of the diameter of most pipes which are normally buff welded.20 A mobile welding device according to claim 1 in which the stepper motor features electronic means similar to a dead man's handle' to unlock the alignment rotor for the torch by pushing down a button for repositioning during the welding process and releasing to start welding again.Amendments to the claims have been made as follows: Claims 1 A mobile welding device comprising; a travel motor with reversible drive with a means to engage and disengage the said drive; a combined drive and idle wheel which can be set into several positions by a safety locking lever which configures the fifting, connection and drive engagement of the said combined drive and idle wheel on the edges of a circumferential metal guide band attached to a pipe of any radius which is positioned to be butt welded to an identical pipe; a pair of mirror-image alignment plates which facilitate the radial adjustment of an attached pair of arms, the wheels on the ends of which engage onto the opposite edges of the aforementioned circumferential metal guide band which is attached to the aforementioned pipe.(V) 2 A mobile welding device according to claim 1 in which the travel motor is centrally positioned. 153 A mobile welding device according to claim 1 in which a top flange of the travel (\J motor when pushed down locks to engage the drive.4 A mobile welding device according to claim 1 in which a top flange of the travel motor when pulled up disengages the drive.A mobile welding device according to claim 1 in which the travel motor is reversible.6 A mobile welding device according to claim 1 in which the travel motor is controlled by electronics and is reversible via a toggle switch.7 A mobile welding device according to claim 1 which features a combined drive and idle wheel.8 A mobile welding device according to claim 6 in which the combined drive and idle wheel has three positions.9 A mobile welding device according to claim 7 in which the combined drive and idle wheel position can be; open -for attachment to and removal from the circumferential metal band.A mobile welding device according to claim 7 in which the combined drive and idle wheel position can be idle -for clamping onto the edge of the circumferential metal band preventing accidental disengagement which would result in the mobile welding device falling away.11 A mobile welding device according to claim 7 in which the combined drive and idle 7" 15 wheel position can be drivt'n -for controlling the tensioning of engagement to the edge of a circumferential metal band during the welding process. C" (412 A mobile welding device according to claim 8 in which a locking lever controls the positions of the combined drive and idle wheel.13 A mobile welding device according to claim 9 in which the positions of the locking lever can be set at 90 degree increments.14 A mobile welding device according to claim 1 in which mirror-image location plates are attached in a fixed position.A mobile welding device according to claim 1 in which arms, tted wfth free whe&s on their ende, are attached and secured at a suitable angle to mirror-image location plates in order is) enc4age the opposite edge. of the enmeter of the oitumierenUai metai guide t.and of any tvpa radius in that referred to in daim 1 ft 16 A mobile welding device according to claim 1 in which a temporary alignment template is calibrated with a plurality of holes which are radiused about a central flange bolt; the said hole positions calculated to match the different diameters of typical pipes which are butt welded.17 A mobile welding device according to claim 16 in which a temporary alignment plate is offered up to the outside of a location plate to determine correct operational angle of a support arm to enable its idle wheel to run smoothly along the perimeter edge of a typical (Y) pipe which can be butt welded. r7" 15 18 A mobile welding device according to claim 16 in which the temporary alignment plate is removed and taken to the other side of the said mobile welding device and C" (\J reversed to fit over the other location plate to set the angle of the other support arm.19 A mobile welding device according to daims 1,17 and 18 in which support arms, having been set in the correct positions by the aforementioned temporary alignment plate, facilitate accurate engagement of their respective idle wheels around the circumference of the diameter of most pipes which are normally butt welded.A mobile welding device according to claim 1 in which the stepper motor features electronic means similar to a dead man's handle' to unlock the alignment rotor for the torch by pushing down a button for repositioning during the welding process and releasing to start welding again.</claim-text>
GB1119606.0A 2011-11-12 2011-11-12 Improvements to mobile pipe welding devices Active GB2496448B8 (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
GB1119606.0A GB2496448B8 (en) 2011-11-12 2011-11-12 Improvements to mobile pipe welding devices

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GB201119606D0 GB201119606D0 (en) 2011-12-28
GB2496448A true GB2496448A (en) 2013-05-15
GB2496448B GB2496448B (en) 2014-05-07
GB2496448B8 GB2496448B8 (en) 2015-10-07
GB2496448A8 GB2496448A8 (en) 2015-10-07

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106002762A (en) * 2016-06-30 2016-10-12 广州市番禺科腾工业有限公司 Full-automatic replaceable sealing clamp
US20220193817A1 (en) * 2019-07-31 2022-06-23 Fusematic Corporation A multi-position clamp for friction welding operations

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116551307B (en) * 2023-06-26 2024-03-12 泰州市锦峰新材料科技有限公司 Beryllium bronze metal part repair welding device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08281483A (en) * 1995-04-17 1996-10-29 Mitani Sekisan Co Ltd Device for welding pile and pile
KR200272917Y1 (en) * 2002-01-19 2002-04-20 주식회사 에이스침대 head board for bed
KR200420986Y1 (en) * 2006-04-27 2006-07-07 디엠씨(주) Crane of floating dock

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08281483A (en) * 1995-04-17 1996-10-29 Mitani Sekisan Co Ltd Device for welding pile and pile
KR200272917Y1 (en) * 2002-01-19 2002-04-20 주식회사 에이스침대 head board for bed
KR200420986Y1 (en) * 2006-04-27 2006-07-07 디엠씨(주) Crane of floating dock

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106002762A (en) * 2016-06-30 2016-10-12 广州市番禺科腾工业有限公司 Full-automatic replaceable sealing clamp
US20220193817A1 (en) * 2019-07-31 2022-06-23 Fusematic Corporation A multi-position clamp for friction welding operations
US11858062B2 (en) * 2019-07-31 2024-01-02 Fusematic Corporation Multi-position clamp for friction welding operations

Also Published As

Publication number Publication date
GB2496448B8 (en) 2015-10-07
GB2496448A8 (en) 2015-10-07
GB201119606D0 (en) 2011-12-28
GB2496448B (en) 2014-05-07

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S37A Reference after grant concerning uk entitlement (sect. 37(1)/patents act 1977)

Free format text: REFERENCE FILED; REFERENCE UNDER SECTION 37(1) BY GRIDWELD WELDING SYSTEMS LIMITED, FILED ON 1 DECEMBER 2014

S37A Reference after grant concerning uk entitlement (sect. 37(1)/patents act 1977)

Free format text: REFERENCE ALLOWED; IN A DECISION OF THE COMPTROLLER DATED 27 MAY 2015 THE COMPTROLLER ORDERED THAT GRIDWELD WELDING SYSTEMS LIMITED IS THE TRUE PROPRIETOR OF THE PATENT AND ORDERED THAT THE REGISTER OF PATENTS BE UPDATED ACCORDINGLY.

732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)

Free format text: REGISTERED BETWEEN 20190718 AND 20190724