With Specific Generator Patents (Class 219/761)
  • Patent number: 5804801
    Abstract: Methods of facilitating the adhesive bonding of various components with variable frequency microwave energy are disclosed. The time required to cure a polymeric adhesive is decreased by placing components to be bonded via the adhesive in a microwave heating apparatus having a multimode cavity and irradiated with microwaves of varying frequencies. Methods of uniformly heating various articles having conductive fibers disposed therein are provided. Microwave energy may be selectively oriented to enter an edge portion of an article having conductive fibers therein. An edge portion of an article having conductive fibers therein may be selectively shielded from microwave energy.
    Type: Grant
    Filed: March 12, 1997
    Date of Patent: September 8, 1998
    Assignees: Lambda Technologies, Inc., Lockheed Martin Energy Research Corporation
    Inventors: Robert J. Lauf, April D. McMillan, Felix L. Paulauskas, Zakaryae Fathi, Jianghua Wei
  • Patent number: 5721470
    Abstract: In a microwave generator apparatus including a magnetron having a filament and an anode and generating a microwave, a filament power source supplies a filament power to the filament of the magnetron, and an anode power source applies an anode voltage between the filament and the anode of the magnetron. Then a parasitic oscillation detecting circuit detects a parasitic oscillation voltage superimposed on the microwave generated by the magnetron, and a filament power controller, in response to the parasitic oscillation voltage detected by the parasitic oscillation detecting circuit, controls the filament power source to control the filament power so that the parasitic oscillation voltage is made smaller.
    Type: Grant
    Filed: May 6, 1997
    Date of Patent: February 24, 1998
    Assignees: Daihen Corporation, Shibaura Engineering Works Co., Ltd
    Inventors: Noboru Kuriyama, Hiroaki Oichi, Yoshiki Fukumoto
  • Patent number: 5686007
    Abstract: This invention relates to a magnetron of a microwave oven is disclosed including a lead for supporting a filament, and a filament terminal for electrically connecting the lead and a choke coil, wherein the filament terminal has a slit and serves to cut off unnecessary high harmonic leaked out to an input of the magnetron.
    Type: Grant
    Filed: August 29, 1995
    Date of Patent: November 11, 1997
    Assignee: L.G. Electronics Inc.
    Inventor: Yong Ki Jang
  • Patent number: 5676873
    Abstract: There is provided a magnetron comprising a cold cathode having an electron emitting member which is formed linearly or as a plane on a substrate to emit electrons a subdivided anode disposed oppositely in parallel with the electron emitting member, the subdivided anode having cavity resonators formed therein at the side of the cold cathode, and a magnet which producing a magnetic field lying at right angles to an electric field applied between the cold cathode and the subdivided anode. There is also provided a microwave oven for dielectric-heating a substance to be heated by using the magnetron as a microwave supply source.
    Type: Grant
    Filed: June 21, 1995
    Date of Patent: October 14, 1997
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Takeo Takase, Masao Urayama, Terutaka Tokumaru, Minoru Makita, Seiki Yano
  • Patent number: 5604405
    Abstract: A magnetron provided with a filter circuit for suppressing leaking of the electromagnetic wave of the magnetron. First and second choke coils have their respective first ends serially connected to two externally protruding leads for supporting a cathode filament of the magnetron. A feed-through capacitor is parallelly connected to the second ends of the first and second choke coils respectively. The feed-through capacitor is constituted by a dielectric ceramic material having a relative dielectric constant .epsilon..sub.s which satisfies .sqroot..epsilon..sub.s .ltoreq.50, whereby sound pressure produced by of the feed-through capacitor is reduced without increasing the size of the feed-through capacitor and while keeping the necessary breakdown voltage characteristic and necessary electrostatic capacity.
    Type: Grant
    Filed: July 7, 1994
    Date of Patent: February 18, 1997
    Assignees: Hitachi, Ltd., Hitachi Nisshin Electronics Co., Ltd.
    Inventor: Toshio Ogura
  • Patent number: 5600531
    Abstract: A capacitor for the magnetron of a microwave oven is disclosed, in which the structure is relatively simple, so that the material cost would be saved, and that the productivity would be improved. An elliptic opening is formed on a side wall of a shielding case for installing a capacitor. The circumference of the opening is bent to form a projected portion for attaching a capacitor, and a recess is formed on the reverse side of the projected portion. An insulation resin case is formed on the projected portion so as to surround the capacitor by a molding process using an epoxy resin. An insulation cylinder with an upper portion inserted in the recess also can be molded simultaneously with the insulation resin case. Since in replacement of an insulating case and/or insulating cylinder of a conventional capacitor, an insulation resin structure is formed by a molding process, the number of elements is reduced and the assembling process for attaching these elements is eliminated to thereby improve the productivity.
    Type: Grant
    Filed: September 16, 1994
    Date of Patent: February 4, 1997
    Assignee: Daewoo Electronics Co., Ltd.
    Inventor: Wookeum Jun
  • Patent number: 5575943
    Abstract: This invention discloses an improved safety device for microwave oven having one thermostat commonly preventing possible overheat of the cavity and magnetron of the microwave oven. The thermostat is placed in a position suitable for sensing both a peripheral temperature of a magnetron and a temperature of an air exhausted from a heating cavity through an air exhaust port. The thermostat cuts off the outside electric power for the microwave oven when the peripheral temperature of the magnetron or the temperature of the exhaust air coming out of the heating cavity is higher than a predetermined allowable temperature. The air exhaust port is provided about the magnetron. The thermostat mounting bracket is connected to the magnetron mounting bracket.
    Type: Grant
    Filed: July 6, 1995
    Date of Patent: November 19, 1996
    Assignee: LG Electronics Inc.
    Inventor: Jong W. Lee
  • Patent number: 5571439
    Abstract: A power supply for a magnetron varies a power output level and prevents moding of the magnetron. To provide a variable power output, a microprocessor senses an anode current and voltage of the magnetron. Based on the sensed signals, the microprocessor adjusts the conduction angle of a thyristor to obtain the desired power level. The microprocessor also monitors the anode voltage for detecting moding of the magnetron. If moding is detected, the microprocessor adjusts the conduction angle of another thyristor to change the current supplied to the filament. By changing the filament current, the microprocessor effectively prevents the moding of the magnetron.
    Type: Grant
    Filed: April 27, 1995
    Date of Patent: November 5, 1996
    Assignee: Fusion Systems Corporation
    Inventors: Chuck Daley, Robert J. Sweetman, Charlie Lenny
  • Patent number: 5558800
    Abstract: The output matching networks normally included in a microwave power transistor package as well as the transistor combining network therefor are eliminated for heating applications, e.g. microwave ovens. In a preferred embodiment, the transistor dies of four microwave silicon bipolar power transistors are directly connected to the low impedance points of a common patch type antenna element, also referred to as an applicator, located within the wall of a heating chamber in place of a magnetron. Each pair of power transistors are electrically spaced one half wavelength apart and are located transverse to each other on the antenna. The transistors are operated in pairs with a 180.degree. phase difference so that mutually orthogonal longitudinal modes are excited in the antenna. Moreover, the transistors are frequency modulated over their prescribed frequency band to eliminate standing waves in the load, i.e. the article or substance being heated or cooked.
    Type: Grant
    Filed: June 19, 1995
    Date of Patent: September 24, 1996
    Assignee: Northrop Grumman
    Inventor: Derrick J. Page
  • Patent number: 5548105
    Abstract: A magnetron assembly that is adapted to be mounted on a wall of a waveguide in a microwave oven includes a yoke enclosure in which is disposed a magnetron tube. The yoke enclosure is generally U-shaped with an open top end and open opposite ends to permit air flow through the yoke enclosure and past circular disc shaped cooling fins that are affixed only to an anode assembly about the magnetron tube. Different configured mounting plates can be detachably disposed in the open top end of the yoke enclosure. A filter box has input power terminals for the magnetron tube extending therefrom and is mounted with respect to a bottom wall of the yoke enclosure such that the yoke enclosure can be rotated to various positions relative to the input terminals extending from the filter box.
    Type: Grant
    Filed: July 10, 1995
    Date of Patent: August 20, 1996
    Assignee: Fidelitone Inc.
    Inventors: William Butterworth, Clyde H. Powell
  • Patent number: 5541391
    Abstract: A microwave oven has a cooking chamber and a microwave generator for supplying microwaves to the cooking chamber. The microwave generator is in the form of a klystron which produces a plurality of electron beams for amplifying microwaves.
    Type: Grant
    Filed: May 27, 1994
    Date of Patent: July 30, 1996
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Yeon-Hag Seong
  • Patent number: 5455405
    Abstract: A noise shielding apparatus for the magnetron of a microwave oven is disclosed, in which the structure is relatively simple, so that the material cost would be saved, and that the productivity would be improved. An elliptic opening is formed on a side wall of a shielding case for installing a capacitor. The circumference of the opening is bent to form a projected portion for attaching a capacitor, and a recess is formed on the reverse side of the projected portion. Further, reinforcing ribs are formed around the projected portion of the shielding case. In the present invention, attaching a conventional separate ground fitment is unnecessary, so that the productivity would be improved. Further, since the holes for fastening the ground fitment are not required, the noise is not leaked through the holes.
    Type: Grant
    Filed: September 16, 1994
    Date of Patent: October 3, 1995
    Assignee: Daewoo Electronics Co., Ltd.
    Inventor: Wookeum Jun
  • Patent number: 5451752
    Abstract: A noise shielding apparatus for the magnetron of a microwave oven for preventing the lowering of the voltage resistance of the capacitor due to the poor concentricity and the poor interfacial state is disclosed. A shielding case has a side wall with an elliptic opening and a projected portion along the elliptic opening by bending out a circumference portion thereof. The capacitor includes an elliptic cylindrical ceramic dielectric, separate electrodes separately formed on an upper surface of the ceramic dielectric and a common electrode formed on a lower surface of the ceramic dielectric. Through conductors pass through the through holes and are connected to a choke coil of the magnetron. Each of through conductors is provided with an electrode connection portion for electrically connecting with the separate electrodes integrally and horizontally formed from around an upper portion of each of through conductors.
    Type: Grant
    Filed: December 16, 1994
    Date of Patent: September 19, 1995
    Assignee: Daewoo Electronics Co., Ltd.
    Inventors: Wookeum Jun, Byeongjun Kim, Wonpyo Hong, Sangjin Kim, Byungkap Lim, Heungdae Kang, Jaewon Cho
  • Patent number: 5438182
    Abstract: A choke coil apparatus for an electromagnetic range comprises an improved ferrite core, so as to prevent an increasing in temperature of the choke coil. The ferrite core in a multiangular bar-shape forms a plurality of ventilation spaces between the choke coil and the ferrite core, thereby air-cooling the choke coil by the air flowing in the ventilation space.
    Type: Grant
    Filed: August 24, 1992
    Date of Patent: August 1, 1995
    Assignee: Gold Star Co., Ltd.
    Inventor: Byoung T. Choi
  • Patent number: 5378876
    Abstract: The invention relates to a microwave oven which neither generates hot spots nor destroys a magnetron by shutting microwaves when there is no load to be heated. This microwave oven is constructed so that the impedances are matched when there is a load, and the impedances are unmatched when there is no load, by shifting the location of the opening of the cooking chamber from the center of the wave guide. When there is no load, as most of the microwaves are converted to standing waves and the pressing waves do not reach the cooking chamber, then it becomes possible to prevent dangers such as the abnormal irradiation of any part, the destruction of the chamber case owing to the occurrence of the heat spot, and the abnormal heat generation due to the leakage of the short waves.
    Type: Grant
    Filed: August 25, 1993
    Date of Patent: January 3, 1995
    Assignee: Funai Electric Co., Ltd.
    Inventor: Yuichi Kitagawa
  • Patent number: 5350905
    Abstract: In a magnetron for a microwave oven comprising a plurality of vanes as an anode and an antenna feeder mounted to the vanes, an antenna feeder fixing device comprising a plurality of radially spaced grooves formed at the upper surface of every other vane so that the antenna feeder is engaged with one of the grooves selected depending on the output of the magnetron. The antenna feeder fixing device can be applied to various models of magnetrons having different outputs, without changing the construction of vanes. This enables modular elements to be used for providing various models of magnetrons, irrespective of different outputs of magnetrons. Only one mold is needed for preparing a single vane construction having a plurality of grooves for various magnetron models, thereby enabling the manufacture cost to decrease.
    Type: Grant
    Filed: November 19, 1992
    Date of Patent: September 27, 1994
    Assignee: Goldstar Co., Ltd.
    Inventor: Byoung T. Choi
  • Patent number: 5348212
    Abstract: An improved welding method is provided for repairing broken rotors. The welding method preferably employs a 2.25Cr-1.0Mo-0.3V-type filler metal, preferably deposited using a narrow groove welding technique. The broken pieces are aligned end to end. A narrow groove is formed to substantially remove the end surfaces. The groove is preheated, filled with the welding filler metal, and postheated, resulting in a strong, high temperature resistant, long lasting weld.
    Type: Grant
    Filed: January 14, 1994
    Date of Patent: September 20, 1994
    Assignee: Commonwelth Edison
    Inventor: George W. Galanes
  • Patent number: 5321222
    Abstract: A variable frequency microwave furnace system (10) designed to allow modulation of the frequency of the microwaves introduced into a furnace cavity (34) for testing or other selected applications. The variable frequency microwave furnace system (10) includes a microwave signal generator (12) or microwave voltage-controlled oscillator (14) for generating a low-power microwave signal for input to the microwave furnace. A first amplifier (18) may be provided to amplify the magnitude of the signal output from the microwave signal generator (12) or the microwave voltage-controlled oscillator (14). A second amplifier (20) is provided for processing the signal output by the first amplifier (18). The second amplifier (20) outputs the microwave signal input to the furnace cavity (34). In the preferred embodiment, the second amplifier (20) is a traveling-wave tube (TWT). A power supply (22) is provided for operation of the second amplifier (20).
    Type: Grant
    Filed: November 14, 1991
    Date of Patent: June 14, 1994
    Assignee: Martin Marietta Energy Systems, Inc.
    Inventors: Don W. Bible, Robert J. Lauf
  • Patent number: 5308409
    Abstract: A method of strengthening an aluminum casting by modifying qualities of a specified part thereof comprises the steps of forming a weld overlay on the specified part using powders made of heat resisting element and remelting the specified part, now overlaid with the layer of heat resisting alloy layer, using high density energy.
    Type: Grant
    Filed: April 22, 1991
    Date of Patent: May 3, 1994
    Assignee: Isuzu Motor Limited
    Inventors: Tadashi Kamimura, Akira Tsujimura
  • Patent number: 5268557
    Abstract: The invention relates to a recharging or reloading bead incorporating discontinuous fibres or at least one reinforcing wire.This bead comprises a core reinforced by discontinuous fibres or at least one continuous wire (6) made from a non-fragile material, which melts or burns at a temperature equal to or above 500.degree. C., e.g. a weldable alloy or metal, such as copper or stainless steel. It also comprises an outer sheath (9b) made from an organic substance.It can be produced by the co-extrusion or co-spinning of two pastes.
    Type: Grant
    Filed: December 13, 1991
    Date of Patent: December 7, 1993
    Assignee: SNMI Societe Nouvelle de Metallisation Industries
    Inventors: Maurice Ducos, Robert Tell
  • Patent number: 5068507
    Abstract: A method and apparatus for electroslag surfacing of metal plate which utilizes a plate feeder assembly to which the plate is presented and which includes an elongate, horizontally disposed feeder table having an approach-end section and a runout-end section. The plate, with a major surface uppermost, is conveyed along the feeder table in a feeding direction from said approach-end section to said runout-end section, and is subjected to an electroslag operation at a surfacing installation located intermediate those sections to provide a cladding metal layer on that surface. At the surfacing installation, there is a flux mould arrangement under an electrode holder and feeder assembly having depending electrodes vertically in line with the interior of the mould arrangement. The plate is passed under the mould arrangement and the electrode holder and feeder assembly is vertically adjusted to bring a lower end of the electrode means into contact with the upper surface and to establish current flow.
    Type: Grant
    Filed: January 31, 1991
    Date of Patent: November 26, 1991
    Assignees: Commonwealth Scientific and Industrial Research Organisation, Vida-Weld Pty. Limited
    Inventors: Ian R. Dick, Ian D. Henderson, Gordon L. Kimpton, David S. Wyatt
  • Patent number: 4942059
    Abstract: The present invention provides a method for applying a hardface alloy coating on a metal substrate concurrently with a nitriding procedure so that the hardface coating is deposited and nitrided in one step. The deposition of the metal hardface coating is conducted in an atmosphere of nitrogen under nitriding conditions. The single step of metal deposition and nitriding is made possible by using a hardface alloy composition containing 20-75% niobium, 5-35% titanium and 10-60% tungsten.
    Type: Grant
    Filed: September 29, 1988
    Date of Patent: July 17, 1990
    Assignee: Westinghouse Electric Corp.
    Inventor: Ian L. W. Wilson
  • Patent number: 4937417
    Abstract: An arc spray metallizing gun is provided with electrical conductors which are cooled by circulating a stream of coolant liquid along the length of the conductors. The wire feed mechanism includes a motor which has a shaft carrying two drive gears. One drive gear is engaged with a driven gear connected to a first wire feed wheel, and the other drive gear is connected to a driven gear connected to a second wire feed wheel. The driven gears are located on opposite sides of the shaft, and the teeth on the two drive gears face in opposite axial directions on the shaft so that the driven gears and the feed wheels connected thereto are all rotated in directions which drive the wires forwardly in convergent wire guides.
    Type: Grant
    Filed: June 27, 1989
    Date of Patent: June 26, 1990
    Assignee: Douglas Call, Jr.
    Inventor: Thomas J. Fox
  • Patent number: 4869417
    Abstract: An automatic build-up welding machine for repair of workpieces such as track rollers. The machine requires no operator in charge during the welding operation. The apparatus comprises a device including a pair of guides, and a switch box connected adjustably in position to a welding torch, the switch box housing therein a pair of limit switches for reversing motion of the torch and a swing lever positioned between the limit switches. The apparatus controls the travel of the torch by varying half-cycles of the reciprocable travel thereof.
    Type: Grant
    Filed: October 26, 1988
    Date of Patent: September 26, 1989
    Assignee: Maruma Jyusharyo Kabushiki Kaisha
    Inventor: Yasumitsu Moriki
  • 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: 4842186
    Abstract: A method and apparatus for building a workpiece of a desired geometry by deposit welding with a reusable preform. The reusable preform forms, supports, and cools the deposited molten weld material puddle while the weld material is solidifying thereby eliminating the need for a conventional preform. The reusable preform may be mobile or stationary in any shape, e.g., a block, a cylinder, or a belt. It is manufactured from either a combination of or exclusively of, a ceramic material or a material with high thermal conductivity.
    Type: Grant
    Filed: June 20, 1988
    Date of Patent: June 27, 1989
    Assignee: The Babock & Wilcox Company
    Inventors: Thomas E. Doyle, David P. Edmonds, Michael D. McAninch, Patrick M. Ryan
  • Patent number: 4841117
    Abstract: In this method of lengthening the blade aerofoil (5) of turbo machines by building up with weld in the assembled condition of the blades, the position (4) to be welded at the end of the blade aerofoil (5) is encased by a metal mold (1,2). The mold (1,2) has a connection (3) where one pole of the welding circuit is connected. The end (4) of the blade aerofoil is lengthened or repaired by applying runs of weld. The mold (1,2) can be optionally supplemented with heating and/or cooling arrangements and also with a protective gas supply.
    Type: Grant
    Filed: December 3, 1987
    Date of Patent: June 20, 1989
    Assignee: BBC Brown Boveri AG
    Inventor: Tibor Koromzay
  • Patent number: 4841123
    Abstract: An automated welding device for applying a weld overlay to a preexisting weld at the saddle-shaped juncture between a horizontal header pipe and a vertical riser pipe includes a track mountable to the header and adapted to receive a carriage for orbital movement thereon. The carriage is self-propelled and includes a guide means for engaging a flat surface of the track to maintain the carriage in the desired orientation. A welding torch can be mounted to the carriage for movement toward and away from the surface of the pipe and for movement back and forth across the width of the preexisting weld. The track can be oriented to permit the welding torch to follow a predetermined path in more than one orthogonal plane.
    Type: Grant
    Filed: June 17, 1987
    Date of Patent: June 20, 1989
    Assignee: Welding Services, Inc.
    Inventors: Frank Novak, Hartmut W. Fleiss
  • Patent number: 4828161
    Abstract: A method and device for manufacturing thin-walled hollow bodies comprising concentric layers employs, for thin-walled structural parts of chemical installations subjected to stress at high temperatures, non-layered pipes of single-metal materials. Due to the methods of manufacture, structural parts of these materials have disadvantages because the single materials of which they are built cannot simultaneously satisfy the demands of corrosion resistance, high-temperature stability and resistance to scaling. According to the new method, for example, thin-walled pipes of concentric, non-corrosive, high-temperature stable, and non-scaling material layers are intended to be produced. For the non-corrosive inner layer, for example, a conventional thin-walled pipe is used.
    Type: Grant
    Filed: May 19, 1988
    Date of Patent: May 9, 1989
    Assignee: Man Gutehoffnungshuette GmbH
    Inventor: Karl Million
  • Patent number: 4805826
    Abstract: Described herein is a slag removing apparatus suitable for use on a padi-welding machine, which permits automation of the pad-welding operation and which essentially includes: a C-shaped roller holder located beneath a movable welding torch and provided with a rotational drive mechanism for a roller to be padded; a pair of extension arms horizontally extended on the open side of the roller holder and fixed in vertically adjustable positions; a guide rail support member provided with a rack and bridged between the extension arms in parallel relation with the rotational axis of the roller drive mechanism and detachably at least at one end thereof; a carriage having on a rockable plate a drive motor and a pinion disengageably meshed with the rack and movable along the support member; an inclined mount plate provided on the carriage with a predetermined angle of inclination; and a vibrational beating mechanism holding at least one needle bundle with the fore end thereof in face-to-face relation with the welding s
    Type: Grant
    Filed: September 21, 1987
    Date of Patent: February 21, 1989
    Assignee: Maruma Jysuharyo Kabushiki Kaisha
    Inventors: Yasumitsu Moriki, Hirotomo Numakura, Masahiro Sakurai
  • Patent number: 4760232
    Abstract: A method of cladding a steel roll, such as a felt roll with a non-corrosive shell, ensures that the shell is tightly fitted to the core and is free to expand and contract on the core to avoid distortion problems. The method comprises the steps of preparing two stainless steel shells each having a length equivalent to the circumference of the core plus a predetermined extra, wrapping the shells about the core, side by side, leaving a predetermined circumferential gap between the shells, heating and clamping the shells tightly around the core until the longitudinal joints each attain a predetermined longitudinal gap, welding the longitudinal gaps, and circumferential gap between the shells while the shells are hot, ensuring the sheets are welded together and not welded to the core.
    Type: Grant
    Filed: September 14, 1987
    Date of Patent: July 26, 1988
    Assignee: Mec-Fab Inc.
    Inventor: Ken M. Smith
  • Patent number: 4748736
    Abstract: A press roll for a paper machine includes a cylindrical mantle formed of metal providing the roll with mechanical strength. A coating is provided on the roll mantle, the coating being partially or entirely metallic. The metallic coating is preferably formed of stainless steel containing chromium and provides for a controlled detachment of the paper web from the roll coating as well as durability, i.e., ability to withstand various strains to which the roll surface is subjected. In addition to the metallic component, the roll coating may also include a component or components of ceramic material. A method for manufacturing such a press roll includes the application of the coating to the surface of the cylindrical mantle by band welding wherein the welding admixture band is preferably in the range of between about 30 to 150 mm wide and about 0.5 mm thick.
    Type: Grant
    Filed: August 8, 1986
    Date of Patent: June 7, 1988
    Assignee: Valmet Oy
    Inventor: Veijo Miihkinen
  • Patent number: 4746540
    Abstract: In this method for forming an alloy layer on the surface of an aluminum alloy substrate, a powder for alloying, containing a substance to be alloyed with the substrate and an element selected from the group consisting of silicon and bismuth, is disposed upon the surface of the aluminum alloy substrate. This powder is then irradiated with a CO.sub.2 laser, so as to be melted and fused together with a surface portion of the aluminum alloy substrate, so that these two are alloyed together. The powder for alloying may be a powder of an alloy of the substance to be alloyed with the aluminum alloy substrate and the element selected from the group consisting of silicon and bismuth, or alternatively may be a mixture of a powder of the substance to be alloyed with the aluminum alloy substrate and a powder of the element selected from the group consisting of silicon and bismuth.
    Type: Grant
    Filed: August 8, 1986
    Date of Patent: May 24, 1988
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Minoru Kawasaki, Soya Takagi, Kazuhiko Mori, Shinji Kato
  • Patent number: 4732778
    Abstract: In a method for forming a covering composite layer on the surface of an aluminum alloy substrate, a powder mixture containing ceramic carbide of a metal, silicon and a metal element which forms with silicon an inter metallic compound having a specific gravity comparable with that of the ceramic carbide is disposed upon the surface of the aluminum alloy substrate, and then the powder mixture so disposed is irradiated with a laser, so that the silicon and the metal element which forms the inter metallic compound with silicon in the powder mixture and a surface portion of the aluminum alloy substrate are melted and fused together.
    Type: Grant
    Filed: September 2, 1986
    Date of Patent: March 22, 1988
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Minoru Kawasaki
  • Patent number: 4660756
    Abstract: The apparatus for the build-up welding of a hollow articles uses at least two rollers for supporting the hollow parent member during application of the build-up welding. The rollers ride on a raceway formed on the hollow parent member.Where the raceway is also formed of built-up welding, the rollers are provided in pairs with each roller being alternatingly relieved of load to permit build-up of the raceway.
    Type: Grant
    Filed: December 12, 1985
    Date of Patent: April 28, 1987
    Assignee: Sulzer Brothers Limited
    Inventor: Max Geisseler
  • Patent number: 4622451
    Abstract: An improved apparatus for rebuilding worn shoe grouser for track chain by welding operation is disclosed. The worn part of shoe is cut off and replacement lug is placed on grouser so that the welding end face of the former comes in tight contact with the welding end face of the latter while they are held between the lug holding member and the shoe holding member. The shoe holding member is adapted to move forward and backward via a shoe supporting member by means of a hydraulic cylinder and the whole assembly of hydraulic cylinder, shoe supporting member, shoe holding member and lug holding member is turnable about the axis of rotary shafts by actuating the turning mechanism. While replacement lug and grouser are brought in firm contact with one another, welding operation is carried out over the one welding area on shoe to be rebuilt.
    Type: Grant
    Filed: February 7, 1985
    Date of Patent: November 11, 1986
    Assignee: Maruma Jyusharyo Kabushiki Kaisha
    Inventors: Yasumitsu Moriki, Masahiro Sakurai
  • Patent number: 4588869
    Abstract: A welding machine is used to heat the outer surface of a butt welded joint of pipe sections such that the weld heat input condition q/t.sup.2 (where q: heat input and t: the thickness of the wall of a pipe) is higher than approximately 0.01 and the relative heat transfer coefficient ht/.lambda. (where h: the heat transfer coefficient between a coolant and the inner surface of a pipe and .lambda.: the thermal conductivity of a pipe) is higher than approximately 2, whereby the residual stresses at the inner surface of the weld can be relieved by utilizing the temperature difference between the outer and inner surfaces of the pipe.
    Type: Grant
    Filed: February 24, 1984
    Date of Patent: May 13, 1986
    Assignee: Ishikawajima-Harima Jukogyo Kabushiki Kaisha
    Inventors: Kazuo Yoshida, Tadahiro Umemoto
  • Patent number: 4585917
    Abstract: The outer surface of a butt-welded joint is build-up welded such that a ratio h/t is higher than approximate 0.2 and a ratio L/.sqroot.Rt is higher than approximate 1, where h denotes height of a build-up welded portion; t, wall thickness of a pipe; L, width of the build-up welded portion; and R, radius of the pipe. As a result, the residual stresses in the build-up welded portion counterbalances the residual stresses in the welded joint, whereby the residual stresses at the inner surface of the welded joint can be relieved.
    Type: Grant
    Filed: February 17, 1984
    Date of Patent: April 29, 1986
    Assignee: Ishikawajima-Harima Jukogyo Kabushiki Kaisha
    Inventors: Kazuo Yoshida, Tadahiro Umemoto
  • Patent number: 4550235
    Abstract: An apparatus for restoring the surfaces surrounding blind or through bores of metallic workpieces has a housing for an axially movable shaft which can be placed into axial alignment with the bore of a workpiece, a spindle which is rotatable in and is movable axially with the shaft, and several tool carriers each of which can be removably connected with the front end portion of the spindle. At least one of the carriers supports a welding nozzle which is surrounded by a nozzle for discharge of a protective gas and can be used to deposit fillets of molten welding wire along the surface or surfaces surrounding the bore. Another carrier supports a material removing tool which is used to remove the surplus of the fillet, and a third carrier is used when the restored surface is to be provided with a thread. The third carrier supports a thread cutting tool.
    Type: Grant
    Filed: July 26, 1983
    Date of Patent: October 29, 1985
    Inventor: Peter Fuwesi
  • Patent number: 4536128
    Abstract: The barrel housing of a multistage centrifugal pump has an elongated cylindrical main section and a discrete annular section which is inserted into one end portion and defines an annular shoulder facing the other end portion of the main section. The shoulder is engaged by the inner casing of the pump. The annular section can constitute a prefabricated component or is formed by cladding. The inlet opening of the housing is provided only in the one end portion of the main section, only in a portion of the annular section which extends outwardly beyond the one end portion of the main section, or is a composite opening having a first part in the one end portion of the main section and a registering second part in the annular section. The outlet opening for compressed fluid is provided in the other end portion of the main section.
    Type: Grant
    Filed: August 10, 1983
    Date of Patent: August 20, 1985
    Assignee: Klein, Schanzlin & Becker Aktiengesellschaft
    Inventors: Gunter Feldle, Klaus Fischer
  • Patent number: 4527039
    Abstract: To repair worn-out bearing lugs of iron bolt bearings, excess material is applied to the bearing surface by means of a welding head rotating inside the bearing lug. This material then is turned down to the regular bearing surface.
    Type: Grant
    Filed: March 4, 1983
    Date of Patent: July 2, 1985
    Inventor: Peter Fuwesi
  • Patent number: 4517434
    Abstract: A method of manufacturing a tube bend of a metal comprises positioning a base ring in the range of the welding device, using the welding device to deposit a first section of metal on the ring, moving the ring and the welding device through an arc relatively to each other by substantially the thickness of the first section of metal and thereafter depositing a subsequent section over the first section and repeating the moving and the depositing until the desired section thickness is formed into a wall. The device includes means for mounting a plate for pivotal movement and a base ring mounted on the plate for movement therewith below a welding device arranged so that the welding device and the plate remove relatively through an arcuate path so that a series of sections of metal may be built up into a tube bend wall. The welding device advantageously includes an electrode feeder and the apparatus preferably includes a welding device to provide a plating along the side of the wall section which is built up.
    Type: Grant
    Filed: December 5, 1983
    Date of Patent: May 14, 1985
    Assignee: M.A.N. Maschinenfabrik Augsburg-Nurnberg Aktiengesellschaft
    Inventors: Karl Million, Horst Zimmermann
  • Patent number: 4500766
    Abstract: A snow plow runner for supporting the blade of a snow plow above the abrasive surface of a roadway with the snow plow runner formed of a material of a first melting temperature and having a plurality of hardened pads formed of a material of a similar melting temperature to permit fusing the pads to the snow plow runner to provide a high abrasion resistant surface that permits the snow plow runners to be used over an extended period of time.
    Type: Grant
    Filed: February 4, 1982
    Date of Patent: February 19, 1985
    Assignee: Paper, Calmenson & Co.
    Inventor: Paige J. Reinhardt
  • Patent number: 4493963
    Abstract: A method and machine for weld cladding, particularly for welding material to a cylindrical plate, such as hardfacing or corrosion resistant alloys normally applied as claddings. The machine has a mandrel extending from it for supporting and rotating the plate. The mandrel is supported by beams and driven either by hand or by a motor. Rotating the mandrel rotates the plate supported on the mandrel through the path of a welding apparatus. Flanges can be provided to hold the plate on the mandrel. Bearings can be provided in the beams to facilitate the rotation of the mandrel.
    Type: Grant
    Filed: September 9, 1982
    Date of Patent: January 15, 1985
    Inventor: Roman Arnoldy
  • Patent number: 4432313
    Abstract: An aluminum base material with a hard facing deposit which shows extremely good hot hardness properties when subjected to high operating temperatures. The invention provides a hard facing deposit which shows a hot hardness of at least 100 BHN at 600.degree. F., and has sufficient toughness to resist the formation of cracks when subjected to such operating temperatures. According to the preferred embodiment, the hard facing deposit includes, by weight, about 6% to about 12% silicon, up to about 6% copper, about 2% to about 6% manganese, up to about 3% iron, and about 16% to about 25% nickel. The invention is particularly useful in forming a heavy duty diesel engine piston with a piston ring groove formed in the hard facing deposit.
    Type: Grant
    Filed: May 27, 1982
    Date of Patent: February 21, 1984
    Assignee: TRW Inc.
    Inventor: Wallace M. Matlock
  • Patent number: 4431902
    Abstract: An apparatus for applying a band of hardened metal around a portion of a drill collar in accordance with conventional MIG or TIG welding processes. The improved hardbanding system comprises an AC power source coupled to a water cooled, MIG or TIG welding torch assembly. A hydraulic pump is provided, coupled to the AC power source, for independently driving: (1) a mandril assembly for rotating the drill collar workpiece adjacent the torch assembly, (2) an elevation assembly for adjusting the height of the torch assembly and the mandril assembly; and (3) a pair of hydraulic jacks for lifting the drill collars off of standard pipe racks. The entire system is designed for mounting on the bed of a conventional two ton truck such that the system is easily transportable for on-site hardbanding.
    Type: Grant
    Filed: July 31, 1981
    Date of Patent: February 14, 1984
    Assignee: Rocky Mountain Hardbanders, Inc.
    Inventor: H. Bruce Wallen
  • Patent number: 4404450
    Abstract: A roll welding machine has the frame mounting head and tail stocks for axially supporting a castor roll having a crack therein. The heat source is mounted upon the frame below and along the length of the roll for maintaining said roll at a minimum temperature of 600.degree. F., approximately. An upright support of inverted U-shape is secured to the frame and includes upright standards. Vertically adjustable interconnected slide carriers are mounted upon the standards and connected to a power winch by cables and pulleys. A power reciprocated cross slide is mounted upon the slide carriers and mounts horizontal support beam on which is guidably mounted a travel carriage supporting a depending welding head assembly. A welding wire drive feed head feeds the welding wire from a drum journaled upon the carriage. The side and ends of the roll are enclosed to define a uniform heat zone chamber whereby while the roll is welded, it is maintained at the minimum preheat temperature.
    Type: Grant
    Filed: January 11, 1982
    Date of Patent: September 13, 1983
    Inventor: John F. Weldon
  • Patent number: 4382169
    Abstract: A method of depositing a layer of a metal other than aluminium onto an aluminium-base alloy with the use of surfacing material based on alloying element, wherein the deposition process is conducted at a heat output of the heat source of from 10.sup.3 to 10.sup.5 W per sq cm and the surfacing material being added to the welding pool in an amount of from 20 to 98% by weight, whereafter the metal thus deposited is remelted, with the weld pool volume being increased 1.2-10.0 times each time when the deposited metal is remelted.
    Type: Grant
    Filed: March 24, 1981
    Date of Patent: May 3, 1983
    Inventors: Daniil M. Rabkin, Vladimir R. Ryabov, Vsevolod N. Bernadsky, Anatoly D. Stretovich, Vladimir A. Kirpaty, Ivan A. Koval, Valery F. Zlobin, Arkady B. Menaker, Yakov I. Sherman, Nikolai N. Meleshko, Alexandr N. Shalai
  • Patent number: 4351805
    Abstract: An elevated pressure reactor apparatus for oxidizing or annealing specimens of the type including a reaction tube for containing the specimen surrounded by a heating furnace and enclosed in a pressure chamber, the apparatus incorporating a unique single gas flow feature, an improved multi-element furnace structure, a retrograde closure for the reaction tube to prevent gas flow back from the pressure chamber, a magnetically connected driving mechanism for a specimen support boat, and concentric gas entrance and exit tubes wherein exiting gas pre-heats the entering gas.
    Type: Grant
    Filed: April 6, 1981
    Date of Patent: September 28, 1982
    Assignee: International Business Machines Corporation
    Inventors: Arnold Reisman, Melvin Berkenblit
  • Patent number: 4346280
    Abstract: A method comprises feeding two or more, if necessary, alloying materials and simultaneously changing the ratio thereof. The ratio of the alloying materials is changed at the moment of transition from one section to the other one having different composition, the ratio being changed to such extent that the length of the transition portion is as small as possible. The time of transition is determined depending on the weld pool volume, rate of surfacing, cross section of the layer being built up, amount of the alloying elements both the required and the real one. Determining the time of transition for carrying out the method of the invention is disclosed in term of a preferred embodiment. An apparatus for carrying out the method of the invention is characterized in that it includes an adder-differentiator link, a voltage limiter, a switching device and an aperiodical link. The aperiodical link is a simulator of the weld pool.
    Type: Grant
    Filed: July 1, 1980
    Date of Patent: August 24, 1982
    Inventors: Sergei V. Gulakov, Boris I. Nosovsky, Leonid K. Leschinsky, Ksenofont K. Stepnov, Anatoly E. Rudnev