Using Backup Means Patents (Class 228/216)
  • Patent number: 8622094
    Abstract: A method for protecting a welded pipe assembly from metal dusting and a welded pipe assembly suitable for performing the method. The welded pipe assembly comprises two pipes, weld material joining the two pipes and insulating material. The pipes are protected from metal dusting by a protective coating. The present invention is useful for conveying gases comprising carbon monoxide at temperatures greater than 425° C. while preventing metal dusting of the welded piping assembly.
    Type: Grant
    Filed: August 5, 2011
    Date of Patent: January 7, 2014
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Larry Thomas Dorsch, William Robert Licht, David R. Kerstetter
  • Patent number: 8191754
    Abstract: A magnetic plug weld tool includes an arm, a copper alloy plate that is rotatably connected to one end of the arm, and a magnetic base that is connected to the arm. The arm is configured to apply a force to the copper alloy plate using the magnetic base.
    Type: Grant
    Filed: September 17, 2009
    Date of Patent: June 5, 2012
    Assignee: Durston Mfg. Co.
    Inventor: Donovan K. Norton
  • Patent number: 7028881
    Abstract: Method for welding objects having limited backside access to a cavity behind a region to be welded. The method includes inserting a fugitive backing material in an installation state into a first portion of the cavity proximate the region to be welded and then transforming the fugitive backing material to a rigid state. The method further includes forming a weld in the region and then transforming the fugitive backing material to a removable state and removing the fugitive backing material from the cavity. The method may also include placing a pre-formed weld backing in the cavity and filling the cavity with a fugitive backing material. The method further includes transforming the fugitive backing material to a rigid state, forming a weld, and transforming the fugitive backing material to a removable state. The method may further include removing the fugitive backing material and removing the pre-formed weld backing from the cavity.
    Type: Grant
    Filed: September 18, 2003
    Date of Patent: April 18, 2006
    Assignee: Siemens Power Generation, Inc.
    Inventors: Peter J. Ditzel, Paul J. Zombo
  • Patent number: 6651869
    Abstract: A method of wave soldering a circuit board while avoiding reflow of a solder joint on the topside of the board from heat conducted from the solder wave through at least one via in the board in heat conducting relation with the topside solder joint, comprises subjecting the circuit board to a solder wave and absorbing heat being conducted from the solder wave through the at least one via with an endothermic material in the via hole which undergoes a heat absorbing reaction. The heat absorbing reaction of the endothermic material is preferably a phase change, such as melting. The melted endothermic material is retained in the via hole during wave soldering by capillary forces and a cap on the lower end of the via hole. A disclosed method of making the circuit board includes locating the endothermic material in the via hole by inserting a preform of the endothermic material into the via hole or hot dispensing the endothermic material into the via hole.
    Type: Grant
    Filed: September 21, 2001
    Date of Patent: November 25, 2003
    Assignee: Intel Corporation
    Inventors: Raiyomand F. Aspandiar, Tom E. Pearson, Christopher Combs
  • Patent number: 6398100
    Abstract: A back-up clamp suitable for backing up a weld to be formed between adjacent pipe lengths in a pipeline, the clamp having a rigid clamp body, at least one set of clamping members mounted upon the clamp body, a set of back-up shoes mounted upon the clamp body, the set of clamping members and the set of back-up shoes being movable relative to the body, movement of the set of clamping members and the set of back-up shoes being controlled by fluid pressure applied to at least one location of the clamp, the clamp having a number of conduits adapted to deliver pressurised fluid to the location(s), all of each conduit being located within the body. The invention permits the provision of a back-up clamp which requires no flexible or external fluid hoses, and permits the manufacture of a back-up clamp suitable for use with small-diameter pipelines.
    Type: Grant
    Filed: April 28, 2000
    Date of Patent: June 4, 2002
    Inventors: Kevin Alan Radbourne, Zdzislaw Leon Drewnicki, John Simon Eastham, Keith Vickery
  • Publication number: 20010007331
    Abstract: In the present invention, by the method using a backing material such as copper, which is not melted by a welding heat source, in an end face of a member without using a backing metal or consumable backing material at a joint welding time, overlay welding is performed to increase a plate thickness and a plate width. Thereafter, edge preparation including a member of a designed joint weld location and an overlay weld is performed, and the groove processed portion is placed to an opponent member to provide joint welding in order to obtain an effective throat depth more than a plate thickness and a plate width of the member.
    Type: Application
    Filed: January 8, 2001
    Publication date: July 12, 2001
    Inventors: Shunji Iwago, Masayoshi Uchida
  • Patent number: 6164904
    Abstract: A method and assembly useful in metal joining processes is disclosed which blocks the deposition of molten metal in openings. The method and assembly employs mica material with a binder to block the flow of molten metal. In one detailed embodiment, the mica material supports elements of the articles being brazed.
    Type: Grant
    Filed: August 7, 1998
    Date of Patent: December 26, 2000
    Assignee: United Technologies Corporation
    Inventors: Beth Kwiatkowski Abriles, David Norwood Potter
  • Patent number: 6156408
    Abstract: The method (400, 500) and device (200) for reworkable direct chip attachment include a thermal-mechanical and mechanical stable solder joint for arranging connection pads on a top surface of the circuit board to facilitate connection for electronic elements, and affixing a reinforcement having apertures to accommodate solder joints to the top surface of the circuit board to facilitate solder attachment of the connection pads to the electronic elements wherein the reinforcement constrains deformation of the circuit board to provide reliable solder joints and facilitates attachment and removal of electronic elements from the circuit board.
    Type: Grant
    Filed: August 29, 1997
    Date of Patent: December 5, 2000
    Assignee: Motorola, Inc.
    Inventors: Wen Xu Zhou, Daniel Roman Gamota, Sean Xin Wu, Chao-pin Yeh, Karl W. Wyatt, Chowdary Ramesh Koripella
  • Patent number: 5887779
    Abstract: A high performance soldering sleeve having improved heat transfer characteristics. The soldering sleeve has a continuous winding of solder coils positioned within a heat shrinkable tubular member. The solder coils, having a proper flux to solder ratio which increases performance of the soldering sleeve by generating a better solder flow. The solder coils also have better heat adsorption and heat transfer characteristics than prior art solid solder inserts. The solder coils further have the advantage of forming a plurality of lines which provide a fail safe configuration as a visual cue to indicate when a proper amount of heat has been applied to the soldering sleeve.
    Type: Grant
    Filed: April 25, 1997
    Date of Patent: March 30, 1999
    Assignee: Phoenix Logistics, Inc.
    Inventor: Gene L. Fehlhaber
  • Patent number: 5873512
    Abstract: A method of forming a bond structure for use with integrated circuits and semiconductor electronics and carrier assemblies is disclosed. Metallurgical paste is screen printed through a stencil and the stencil is left in place during the reflow process. The melting point of the bond structure and the metallurgical paste is lower than the melting point of interconnects on the electronic components and less than the decomposition temperature of the carrier assemblies to which the electronic components are bonded.
    Type: Grant
    Filed: April 25, 1997
    Date of Patent: February 23, 1999
    Assignee: International Business Machines Corporation
    Inventors: James Daniel Bielick, Mark Kenneth Hoffmeyer, Phillip Duane Isaacs, Thomas Donald Kidd, David Allen Sluzewski
  • Patent number: 5624067
    Abstract: A method and apparatus for groove weld joining pipe sections along a rotating preform having a circumferential groove thereon along which the preformed adjoining pipe sections are located to form a weld in the joining area and a underbead in the groove of the preform to thus weld together the pipe sections.
    Type: Grant
    Filed: September 26, 1995
    Date of Patent: April 29, 1997
    Assignee: The Babcock & Wilcox Company
    Inventors: Dennis D. Harwig, John M. Sanders, Stephen W. Manring
  • Patent number: 5511721
    Abstract: A preform insert for use in preventing the flow of a braze or solder material into a void in an article during a brazing or soldering operation. The insert is particularly suited to brazing techniques for repairing stator vanes of a gas turbine, though equally effective for use in the manufacture or repair of other articles, as well as soldering operations. The preform insert is composed of a refractory metal oxide powder dispersed in a polymeric solid such that the preform insert is solid yet relatively flexible. As such, the preform insert can be formed to be appropriately shaped and sized to fill a void in an article, such that the void will remain open after the brazing or soldering operation.
    Type: Grant
    Filed: November 7, 1994
    Date of Patent: April 30, 1996
    Assignee: General Electric Company
    Inventors: Wayne A. Demo, John R. Planchak
  • Patent number: 5451741
    Abstract: The invention provides a backing strip for welding technology which can be adapted to a large variety of welding methods and applications and is fully effective also in non-horizontal positions. This is obtained in that the more easily meltable forming layer (1) and the less easily meltable base layer (2) of a flexible thread structure of inorganic fibers are connected to form a flat band by binding the threads (10;20) into a two-layered unitary fabric structure.
    Type: Grant
    Filed: February 22, 1994
    Date of Patent: September 19, 1995
    Assignee: Leslot Industriebedarf GmbH
    Inventors: Jurij V. Doronin, Anatolij I. Retschkin
  • Patent number: 5435480
    Abstract: Plated thru holes in a printed circuit card or board are filled with solder to provide as void free as possible solder fill. According to one method, an adhesive film is provided on the bottom side of a circuit card or board containing plated thru holes. A plurality of solder balls are then provided within at least one thru hole of the card or board. The total volume of the solder balls is greater than the volume of the plated thru hole. The solder balls are reflowed to thereby fill the plated thru hole with solder and provide solder on top of the thru hole.According to another method, a solder ball is provided above and in contact with a plated thru hole. The volume of the solder ball is greater than the volume of the plated thru hole. The solder ball is reflowed to thereby fill the plated thru hole with solder, and to provide solder both above and below the plated thru hole.
    Type: Grant
    Filed: December 23, 1993
    Date of Patent: July 25, 1995
    Assignee: International Business Machines Corporation
    Inventors: Paul J. Hart, Kishor V. Desai, Edward Vytlacil, Ajit K. Trivedi
  • Patent number: 5364012
    Abstract: A method of forming a tank system and a tank system formed thereby wherein the tank system comprises a plastic tank covered by a metal shell.
    Type: Grant
    Filed: April 16, 1993
    Date of Patent: November 15, 1994
    Assignee: Halliburton Company
    Inventors: Gail F. Davis, Joe B. Kersey
  • Patent number: 5356067
    Abstract: An improved internal line up clamp (10) is disclosed which has an integral back up ring (12). A first set of pipe clamps (22) move radially outward to engage the inner surface of a first pipe (14). A second set of pipe clamps (62) and a set of back up ring segments (88) are simultaneously moved radially outward into engagement with the inner surface of the pipes. The back up ring segments (88) are spring loaded to exert a relatively constant back up force against the inner surface of the pipes at the weld. In a modification, a fill block (118) can be used to fill the gap between adjacent back up ring segments when engaging the inner surface of the pipe.
    Type: Grant
    Filed: June 7, 1993
    Date of Patent: October 18, 1994
    Assignee: CRC-Evans Pipeline International, Inc.
    Inventor: Trung Leduc
  • Patent number: 5178317
    Abstract: A method of creating a weld joint between two metal members (B1, B2). The members have coincidentally configured abutting edges (E1, E2), first surface (1A, 1B) which are adjacent to and on one side of the edges, and second surfaces (2A, 2B) which are adjacent to and on the other side of the edges. The method includes chamfering the corners of the respective edges and first surfaces to create a generally V-shaped groove (4) between the first surfaces. A gasket (5) of weld filler material is placed between the edges. The gasket is held between the edges and extends both into the groove and outwardly beyond the second surfaces. The groove is next filled with additional weld filler material (7), and the gasket is then melted and fused with this additional material. The portion of the gasket extending outwardly beyond the respective second surfaces is melted and fused with the edges to form a smooth, continuous surface (8) with the second surfaces.
    Type: Grant
    Filed: June 3, 1992
    Date of Patent: January 12, 1993
    Assignee: ACF Industries, Incorporated
    Inventors: Richard H. Dugge, Stephen A. Coughlin, Bob Barnes
  • Patent number: 5167362
    Abstract: To splice two metal tapes by means of a solder wire that is thicker than the tapes themselves, their terminal edges are positioned upon one electrode, a spacing shim is inserted upon one of the tapes, another electrode is lowered onto the shim, the wire is inserted into the channel formed by the tape and shim edges and the electrodes, the shim is withdrawn to lower the upper electrode down upon the solder, and the latter is then fused.
    Type: Grant
    Filed: April 16, 1992
    Date of Patent: December 1, 1992
    Assignee: Kloften and Kloften (U.S.A.), Inc.
    Inventor: Sigmund Ege
  • Patent number: 5158225
    Abstract: A hand held backing plate tool for the welding repair of holes in sheet metal panels includes a demountable backing plate which may be selected with a size and shape adapted to fit the contour of the panel adjacent the hole to be repaired. The selected backing plate is demountably attached to an insulated handle for convenient positioning by the repairman during repair. The backing plate is made of a copper base alloy to which welding metal will not adhere. The handle is made of a lightweight aluminum core including a heat transfer barrier and the outer surface of the handle is covered with an insulated hand grip. In an alternate embodiment, a mounting block is attached to one jaw of a C-clamp adjustable locking wrench to which the same variety of packing plates may be demountably attached. The locking wrench allows clamping the backing plate in position in some applications.
    Type: Grant
    Filed: January 22, 1991
    Date of Patent: October 27, 1992
    Inventors: Robert G. Ksioszk, Steven W. Gundrum
  • Patent number: 5152702
    Abstract: A solder mask is useful in the preparation of circuit boards when the boards are to be subsequently stacked and a removable plug supported by the solder tail of the contact initially joined to the board affords facile manufacture of the contacts and solder mask and facile assembly of the boards.
    Type: Grant
    Filed: July 5, 1991
    Date of Patent: October 6, 1992
    Assignee: Minnesota Mining Manufacturing Company
    Inventor: James C. Pilny
  • Patent number: 5137202
    Abstract: An article for providing a barrier between solder in a piping joint and the interior of the piping joint so that drinking water flowing therethrough is not contaminated by lead particles resulting from water flow erosion of the solder. The barrier article comprises an annular member a portion of which engages the inner surface of an inner pipe portion and a radially outwardly extending portion of which engages the end of the inner pipe portion and extends radially beyond the outer surface of the inner pipe portion to act as a barrier between solder in the annulus between the inner and an outer pipe portion and the interior of the joint. An indicator may be provided on the inner pipe portion adjacent the joint to assure the user of the piping system that the article was installed.
    Type: Grant
    Filed: July 15, 1991
    Date of Patent: August 11, 1992
    Inventor: Robert J. Purdy, III
  • Patent number: 5135154
    Abstract: A welding accessory which includes an arc shield having outer and inner peripheral surfaces such that a weld can be formed within the inner peripheral surface as the arc shield shields the weld form external air during forming of the weld. The arc shield includes a ceramic material having not less than 40 weight % of boron nitride. The arc shield may be formed of a composite of boron nitride and silicon nitride, a composite of boron nitride and alumina nitride, a composite of boron nitride, aluminum and silicon nitride, or a composite of boron nitride and zirconia.
    Type: Grant
    Filed: November 9, 1990
    Date of Patent: August 4, 1992
    Assignee: Okabe Co., Ltd.
    Inventors: Mikihiko Yoshida, Hiroaki Yamada
  • Patent number: 5125559
    Abstract: Means and method are presented for butt-splicing two metal tapes by confining molten solder between two carbon electrodes while the tape edges are moved together.
    Type: Grant
    Filed: March 13, 1991
    Date of Patent: June 30, 1992
    Assignee: Kloften and Kloften (USA) Inc.
    Inventor: Sigmund Ege
  • Patent number: 5110031
    Abstract: For internally supporting the annular weld during welding together of two pipe ends of two pipes extending mutually in line a weld supporting ring is used consisting of ring pieces comprising at least one supporting body of ceramic material bounding the outer periphery of the weld supporting ring.
    Type: Grant
    Filed: January 10, 1991
    Date of Patent: May 5, 1992
    Assignee: Atlantic Point Inc.
    Inventor: Fernando Rinaldi
  • Patent number: 5104030
    Abstract: An inline splicing system for brittle conductors which is comprised of a superconductor core, a superconductor coil having a length of conductor wound upon it with a terminal end, a supply spool of compatible conductor having a terminal end, both conductors being in an abutting relationship for a prescribed length, a spacer located between a portion of the abutting length and the core, and a soldering means which creates a solder along the abutting length that conforms to the circular surface of the core.
    Type: Grant
    Filed: December 14, 1990
    Date of Patent: April 14, 1992
    Assignee: General Electric Company
    Inventor: Richard A. Ranze
  • Patent number: 5098007
    Abstract: A method of manufacturing a portion of a vehicle body, with the portion being at least part of one of a side, an end, a roof, and a floor plate of the body. The method comprises the steps of providing extruded metal plates formed of a light alloy metal with each of the plates having welding edges and integral structural ribs extending parallel to the welding edges on the inner face of the plates, arranging the plates on a jig in position for welding of the welding edges, without an overlap of the welding edges, restraining the plates in a welding position on the jig, and welding the welding edges on the jig by one-sided welding from an inner side of the plates to produce continuous welds. Frame members extending transversely to the structural ribs can be welded on the same side without moving the plate from the jig.
    Type: Grant
    Filed: January 10, 1990
    Date of Patent: March 24, 1992
    Assignee: Hitachi, Ltd.
    Inventors: Hitoshi Tsuruda, Morishige Hattori, Masato Okazaki, Hiroyuki Yamada, Kiyotaka Kikumoto, Takeyuki Watanabe, Ryoichi Takayama, Sumio Okuno
  • Patent number: 5090612
    Abstract: A method of fabricating a metal pressure vessel for a metal oxide-hydrogen battery. A straight length of metal having a generally T-shape cross section is formed into circular configuration and the abutting ends of the strip are welded together to form a ring that includes a generally circular body portion and a flange or fin which projects radially outward from the body portion. The welded ring is expnded radially outward to precisely fit the open end of the shell of the vessel and the ring is then assembled with the open ends of the shell and head with the ends of the shell and head abutting the outwardly extending fin of the ring. The ends of the shell and head are then welded to the ring to complete the assembly.
    Type: Grant
    Filed: February 13, 1991
    Date of Patent: February 25, 1992
    Assignee: Globe-Union Inc.
    Inventor: Kenneth R. Jones
  • Patent number: 5082166
    Abstract: A connector/beam joining method for joining a beam and a connector having a base plate and a projection, both formed into a T-shape in cross-section, in which the edge of a welding groove provided on the end of the projection of the connector is matched with the edge of the inside surface of a flange constituting the beam for positioning, and a backing strip formed into a prescribed length is fixedly fitted by welding so as to come in close contact with the end surface of the projection and the inside surface of the flange.
    Type: Grant
    Filed: December 21, 1990
    Date of Patent: January 21, 1992
    Assignee: Hitachi Metals, Ltd.
    Inventors: Hideshige Matsuo, Isamu Yamamoto, Michio Itoh, Kuniaki Sato, Yoshihiro Nakamura, Akia Tomita, Yoshiki Mihara
  • Patent number: 5030616
    Abstract: Improvement in a method for producing a sintered elongated article by the steps comprising filling a metal pipe with a material powder, carrying out plastic deformation of the metal pipe and then subjecting the material powder in deformed metal pipe to sintering. In the invention, a netting of metallic wire (1) whose melting point is higher than a melting point of the material powder (3) is arranged around the metal pipe (2) before the sintering.
    Type: Grant
    Filed: July 28, 1988
    Date of Patent: July 9, 1991
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Susumu Yamamoto, Nozomu Kawabe, Shuji Yazu, Tetsuji Jodai
  • Patent number: 5024371
    Abstract: A process is described in which a weld in Aluminum alloy is produced without cracks and porosity; or, cracks and porosity is reduced to a low acceptable level. Thus, the process eliminates or reduces the need of non-destructive testing and re-work which usually involves gouging the defective area and re-welding to make the same sound and crack free. Porosity in the weld, however, can't be reduced once generated during solidification of the weld; therefore, cooling gradients are applied to the weld by placing a back-up material with sufficient heat-sink capacity and having thermal conductivity higher than the base metal/s, the back-up material having the same width which contacts the projected weld width on the opposite side of weld.
    Type: Grant
    Filed: December 26, 1989
    Date of Patent: June 18, 1991
    Inventor: Madhav A. Unde
  • Patent number: 4943001
    Abstract: A tube-type heat exchanger has two tubesheets, each provided with a multitude of bores, and tubes which extend between the tubesheets at their bores, their hollow interiors opening into the bores. Each tube at its ends is joined to the tubesheets along fillet welds which, being free from crevices, eliminate the build up of deposits and corrosion which commonly develop in the crevices of heat exchangers. To assemble the heat exchanger, each tube is passed through a bore in one of the tubesheets and advanced toward the other tubesheet, its leading end being inserted into a socket at the end of a bore in the other tubesheet. Then the leading end of the tube is welded to the tubesheet at which it is located. This leaves the trailing end of the tube in the bore of the tubesheet through which the tube was initially inserted, and that bore likewise terminates at a socket. The trailing end of the tube is machined down from within the bore until it extends no farther than the socket at the end of the bore.
    Type: Grant
    Filed: July 7, 1987
    Date of Patent: July 24, 1990
    Assignee: Nooter Corporation
    Inventor: John J. Meyer
  • Patent number: 4896814
    Abstract: A method of welding in a groove (1) machined in a solid alloyed steel part, characterized in that bottom passes (2) are performed and then each wall (11, 13) of the groove (1) is faced with low alloy steel filler material, heat treatment is performed so as to eliminate the stresses in the zones (18, 19) of the part adjacent to the walls (11, 13) of the groove, and the empty space (20) between the two facing layers (15, 17) is filled with low alloy steel filler materials, said operation of facing the wall (11, 13) being performed by placing a carbon steel plate (4, 4', 2, 22') in the groove (1) at a certain distance from said wall (13, 11), by filling the space (12, 16) between the plate (4, 4', 22, 22') and the wall (11, 13) with layers (14, 14') of low alloy steel having a carbon content lying in the range 0.08% and 0.12%, and by getting rid of the steel plate (4, 4', 22, 22') and optionally a portion of the fill so as to leave only a layer (15, 17) on the wall (13, 11).
    Type: Grant
    Filed: July 28, 1988
    Date of Patent: January 30, 1990
    Assignee: Societe anonyme dite: ALSTHOM
    Inventors: Gilles Allain, Max Nougaret
  • Patent number: 4850524
    Abstract: Method and apparatus for vertical strip clad overlay welding. The method comprises matching the vertical travel of a special welding shoe to an appropriate amount of strip electrode melt-off necessary to maintain a preset molten pool level within a reservoir trough provided by the shoe. The welding shoe comprises a water cooled copper mold for forming the weld bead and a ceramic insert connected to the mold for providing the reservoir trough. Apparatus for correlating the vertical travel speed of the shoe with the strip electrode melt-off is disclosed. Apparatus for applying a plurality of successive weld beads to a vertical vessel wall is also disclosed.
    Type: Grant
    Filed: March 2, 1988
    Date of Patent: July 25, 1989
    Assignee: Southwest Research Institute
    Inventor: Wilbur R. Schick
  • Patent number: 4759981
    Abstract: A welding backup tape assembly includes a flexible, elongated, heat resistant ribbon, such as a metal foil strip, with a flexible, elongated, heat resistant, fibrous rope having a flexible reinforcing core, preferably metallic, attached to one major side of the ribbon, suggestedly by stitching with a glass fiber thread, to form a substantially unitary assembly. Pressure sensitive adhesive layers are applied to the ribbon on either side of the fibrous rope to allow that side of the assembly to be adhered to the weldable workpiece. In the preferred embodiment, the fibrous rope is formed by a knitted, multistrand stainless steel wire core supporting a sheath of knitted, texturized, untwisted fiberglass yarns. Untexturized, low or no twist, continuous, glass fiber thread is used to stitch the rope to the ribbon.
    Type: Grant
    Filed: January 9, 1987
    Date of Patent: July 26, 1988
    Assignee: Davlyn Manufacturing Co., Inc.
    Inventor: Thomas L. Weil
  • Patent number: 4465221
    Abstract: A method of attaching a sole plate to a hollow metal golf club head by providing a dam integral with the head whereby a metallic melt is sustained around the periphery of the sole plate. The dam is later removed so that the sole plate and golf club head are the same height.
    Type: Grant
    Filed: September 28, 1982
    Date of Patent: August 14, 1984
    Inventor: Glenn H. Schmidt
  • Patent number: 4363954
    Abstract: A device for the back support of the first run weld in the automatic butt-welding of two pipes held together by the two circumferential facing sets of radial pistons of an internal connection. The connector includes a set of independent copper pads of trapezoidal shape disposed in the form of a ring and fixed, with their bases alternately inverted, on a corresponding underlying set of pad support elements idly supported by respective horizontal pins rigid with support blocks which are resiliently supported by one of said circumferential sets of radial pistons of said internal connector by means of radial thrust springs. The pads are kept resiliently and constantly pressed against each other in the manner of a ring along their inclined sides by respective horizontal thrust springs supported by said horizontal pins and acting alternately on opposite faces of said pad support elements.
    Type: Grant
    Filed: December 5, 1980
    Date of Patent: December 14, 1982
    Assignee: Saipem, S.p.A.
    Inventor: Fernando Rinaldi
  • Patent number: 4344214
    Abstract: The invention is a remotely thermally activatable device for delivering a payload to a pre-determined location within a pipe comprising a carrier means for supporting the payload, a driver means to axially move the carrier means, and a thermally activatable trigger means connected to the driver means to actuate the driver means. In operation, the device and payload may be placed in a location within a pipe, for example, near the end of a pipe to be welded to an adjoining pipe. Subsequent to such welding, the instant invention may be remotely activated by outside heating of the pipeline in the vicinity of the device, thereby causing the device to move the payload to the pipe weld.
    Type: Grant
    Filed: July 31, 1980
    Date of Patent: August 17, 1982
    Assignee: Raychem Corporation
    Inventor: Lawrence J. White
  • Patent number: 4344556
    Abstract: In welding metal sheets together from only one side, an improved welding backup tape is self-adhesively applied to insure the consistent formation of a smooth, inclusion free, slightly convex underbead which requires little or no dressing, or grinding, and which does not impede in any way the achievement of 100% radiographic weldment testing. This welding backup tape is made in one embodiment by mixing into solution two parts of a colloidal silica solution with one part of a titanium dioxide refractory coating solution. Applying this resulting solution as a refractory coating to the upper portion of an electrical grade, heat treated, braided, natural finish, finely woven, fiberglass material in a sleeving configuration.
    Type: Grant
    Filed: July 6, 1981
    Date of Patent: August 17, 1982
    Inventor: Donald K. Knapp
  • Patent number: 4337387
    Abstract: A section to aid in the welding of metal sheet, the section having a body portion forming part of the sheets, a projection extending from the body portion, which projection receives a strip of weld resistant material, which strip is to be located adjacent abutting edges of the strip.
    Type: Grant
    Filed: July 17, 1980
    Date of Patent: June 29, 1982
    Assignee: Hockney Engineering Pty. Ltd.
    Inventor: Philip K. Hockney
  • Patent number: 4247750
    Abstract: Relates to a flux dam for submerged arc vertical position welding. The dam comprises a sheet of high temperature stable non-metallic material, a permanent magnet aligned with a first pole thereof substantially at a first surface of the sheet for magnetically attaching the sheet to a vertical workpiece generally parallel to and spaced by the thickness of the workpiece from a generally horizontal weld area of the vertical workpiece to an abutting horizontal workpiece, the magnet extending generally towards a second surface of the sheet, the magnet being affixed in the aforementioned alignment thereof. Also relates to an improvement in a welding method using said dam.
    Type: Grant
    Filed: June 2, 1977
    Date of Patent: January 27, 1981
    Assignee: Caterpillar Tractor Co.
    Inventor: Robert F. Hupe
  • Patent number: 4216896
    Abstract: An expandable band is employed to provide a mold on the interior of the joint into which the weld puddle is flowed which may be made of any appropriate material, but preferably is copper. The back-up band is carried on a set of rounding jacks which engage the facing pipe ends and exert a circumferentially uniform radial force on the pipes. This serves to round the ends equally and bring them into coaxial alignment with each other in the vicinity of the joint. The back-up band bridges the joint and expands to form a closed or semi-sealed chamber around the joint.
    Type: Grant
    Filed: March 17, 1978
    Date of Patent: August 12, 1980
    Assignee: Santa Fe International Corporation
    Inventors: Nuke M. Chang, Robin Renshaw
  • Patent number: 4208003
    Abstract: A method of joining shafts is disclosed in which a welded joint is formed between the shaft ends of, for example, a turbine and a generator inside of an assembled turbogenerator structure. A built-up weld portion is provided on the end of each shaft, which is machined to form a welding groove. During installation of the equipment, such as a turbogenerator arrangement, a welding ring is placed onto the end of one shaft. Welding powder is deposited in recesses formed between the shafts and the welding ring. The second shaft is then pressed against the welding ring. The shaft sections are preheated and the groove is supplied with welding material to join the sections while the shafts are being rotated. After completion of the weld, the seam is checked for structural integrity.
    Type: Grant
    Filed: September 6, 1978
    Date of Patent: June 17, 1980
    Assignee: BBC Brown Boveri & Company Limited
    Inventor: Pierre Meylan
  • Patent number: 4205219
    Abstract: A double grooved, preferably ceramic, welding backup is provided. The welding backup has a generally planar working face with parallel grooves, the grooves being separated by a central ridge, there being substantially flat lands at the sides of the grooves.
    Type: Grant
    Filed: June 7, 1978
    Date of Patent: May 27, 1980
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: John B. Snell
  • Patent number: 4203023
    Abstract: An account is given of a welding pool support device for energy beam welding, with a metal structure, which on a beam outlet side of a welding seam zone of a workpiece system is put against the beam outlet side and being in contact with it by a number of touching points for stopping any movement of melt out of the welding zone, which is achieved by the energy beam in the workpiece system, by a relative movement of the energy beam and the workpiece system, the former going along the weld seam zone. A supporting structure, which is able to be so changed in shape that it takes into account uneven parts of the beam outlet side of the workpiece system in the long direction and also in the cross-direction of the weld seam zone.
    Type: Grant
    Filed: May 3, 1978
    Date of Patent: May 13, 1980
    Assignee: Steigerwald Strahltechnik GmbH
    Inventors: Karl-Heinz Steigerwald, Wilhelm Scheffels, Peter Anderl, Dieter Konig, Walther Hiller, Franz Rappold
  • Patent number: 4182951
    Abstract: An assembly for shielding the underside of a weldment joint comprising an elongated, flexible, preferably metallic mounting strip and a plurality of small, discrete back up blocks made of a refractory material suitably secured in end to end array to one face of the metallic strip centrally thereof. The blocks preferably having a groove wider than the weldment joint, the grooves being aligned to define a channel confronting the joint and of a predetermined depth to control the penetration and depth of the weld bead. The back up blocks are of a width narrower than said metallic strip to expose side edge portions of said metallic strip, the exposed side edge portions having an adhesive coating to provide a substantially air-tight sealing engagement with the weldment joint along both edges of the mounting strip.The assembly has a degree of flexibility to permit conformation of the assembly to the shape of the weldment and in use supports slag and the welding pool formed during welding.
    Type: Grant
    Filed: May 15, 1978
    Date of Patent: January 8, 1980
    Assignee: B. A. Kuder Co.
    Inventor: Benedict A. Kuder
  • Patent number: 4107505
    Abstract: A weldment wherein two members are joined by a weld bounded at a back portion by a back-up member providing improved weld penetration and prevention of undesirable conditions in the weld such as root gaps or blow-throughs. The back-up member may comprise an elongated element secured to the surface of one member and, more specifically, may be welded thereto by a continuous weld.
    Type: Grant
    Filed: June 25, 1976
    Date of Patent: August 15, 1978
    Assignee: Caterpillar Tractor Co.
    Inventor: Larry G. Eftefield
  • Patent number: 3972466
    Abstract: The tendency of molten weld metal to burn through a supported refractory welding backup material is greatly reduced by incorporating a woven carbon fiber cloth between the refractory and the support. A preferred product is a pressure-sensitive adhesive tape construction incorporating the carbon-fiber cloth in the backing; surprisingly, the carbon does not embrittle the weld.
    Type: Grant
    Filed: April 15, 1975
    Date of Patent: August 3, 1976
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Roger H. Keith
  • Patent number: 3962662
    Abstract: A metal welding gasket secured between a cover and a container to prevent expulsion of weld material into the interior of the device being welded.
    Type: Grant
    Filed: April 28, 1975
    Date of Patent: June 8, 1976
    Assignee: General Electric Company
    Inventors: Moreland P. Bennett, Albert M. Hobbs, Jr.
  • Patent number: 3960311
    Abstract: A backing and alignment ring assembly for insertion in pipes, particularly for welding purposes, comprising a segmented backing ring and a pair of axially spaced hub members connected to the backing ring by radially and axially extending connecting means. When the hub members are drawn together the backing ring is caused to expand and engage with the pipe bore.
    Type: Grant
    Filed: November 25, 1974
    Date of Patent: June 1, 1976
    Assignee: Welding Controls Limited
    Inventor: Raymond Paul Griffiths
  • Patent number: 3944787
    Abstract: A heater on metal composite unit. A strip of metal has a stripe of an electrically insulative and thermally conductive synthetic resin material bonded to one surface along the length thereof. At least one stripe of an electrically conductive material, having a width less than the width of the insulative stripe, is bonded to the surface of the insulative stripe along the length thereof. A strip of electrical resistance material at least partially overlies the stripes of both the conductive and insulative materials thereby providing a path of electrical resistance material from the conductive stripe transversely across a portion of the width of the insulative stripe whereby when electrical current flows through the electrical resistance material it will supply heat to the metal strip. Apparatus and a process for fabricating these composite units are also disclosed.
    Type: Grant
    Filed: December 26, 1973
    Date of Patent: March 16, 1976
    Assignee: Texas Instruments Incorporated
    Inventor: Ernest M. Jost