With Inductor Support Patents (Class 219/676)
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Patent number: 5895598Abstract: An induction heating roller apparatus comprises:a stationary shaft 23 having a plurality of hydraulic operating mechanisms 27 arranging in one line in the direction of axis, each hydraulic operating mechanism being made up of a cylinder 25 and a piston 26, and magnetic flux generating mechanisms 32 and 35 which comprise iron cores 30 and 33 and induction coils 31 and 34 wound on the latter 30 and 33; anda roller 21 which is rotatably supported on the stationary shaft 23, and has a cylindrical wall which includes jacket chambers 22 filled with a two-phase (gas and liquid) heating medium. In the apparatus, the magnetic flux generating mechanisms 32 and 35 being arranged on both sides of the stationary shaft in the direction of axis in such a manner that they are circumferentially 90.degree. away from the hydraulic operating mechanisms arranged in one line.Type: GrantFiled: September 26, 1997Date of Patent: April 20, 1999Assignee: Tokuden Co., Ltd.Inventors: Yoshio Kitano, Kozo Okamoto
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Patent number: 5889263Abstract: A method and apparatus for induction sealing of a packaging material which includes a layer of aluminum foil. The apparatus includes an inductor with two parallel slightly spaced apart conductors which are disposed in an electrically insulated carrier portion. The conductors are connected to one another and to a high frequency current source by two transverse conductors. The transverse conductors are placed in the upper surface of the inductor and coincide with the outer defining lines of a flat-laid tube of packaging material.Type: GrantFiled: March 19, 1997Date of Patent: March 30, 1999Assignee: Tetra Laval Holdings & Finance S.A.Inventor: Mikael Andersson
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Patent number: 5876832Abstract: Prefabricated composite detail parts use precured strips that include Z-pin reinforcement along the bond line. Each strip has Z-pin stubble protruding from opposed faces so that the pins are embedded into the detail parts when the joint forms.Type: GrantFiled: March 7, 1997Date of Patent: March 2, 1999Inventor: Shawn D. Pannell
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Patent number: 5872352Abstract: A heating machine for heating an ingot of a metal such as a magnesium alloy. The heating machine has a heating chamber equipped with a RF induction coil capable of swinging about a horizontally axis. The coil is placed horizontally, and the metal ingot is fed into the coil from an introduction chamber by a pushrod. Stoppers prevent the ingot from falling from the RF induction coil when it is switched from its horizontal posture to its vertical posture. The coil is wound on a cylindrical member. A rotatable hollow shaft is firmly mounted to the holder in a perpendicular relation to a substantially axially central portion of the cylindrical member. A part of the coil is inserted in the hollow shaft via an insulating material. The rotatable hollow shaft is swung by a swinging mechanism. The induction heating coil is wound on a ceramic holder. A metal ingot is inserted in the holder with a given clearance.Type: GrantFiled: March 21, 1996Date of Patent: February 16, 1999Assignee: Honda Ginken Kogyo Kabushiki KaishaInventors: Hiromitsu Suganuma, Kazuya Sakamoto, Atsushi Suzuki, Masayoshi Kai, Shinji Kazama, Nobumasa Hamazoe
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Patent number: 5847370Abstract: The side seam of a can is coated and heated inductively by passing it through a medium frequency, oscillating magnetic field generated by an induction coil wound around a core. The core is shaped and oriented so as to have two magnetically opposite poles direct magnetic flux in a concentrated manner from the coil into the side seams of cans traveling along a path of travel. The cores are constructed using individual laminations of high frequency core material, each less than about 0.006 inches thick, individually insulated from each other and bound together to form a U- or E-shaped core directing flux toward the workpiece. The induction coil is constructed using a form of Litz wire and the coil and core are air-cooled. In one embodiment, the core has a plurality of pole pieces each directed toward the path of travel. The induction coil is wound on the core such that sequential ones of the pole pieces along the path of travel have alternatingly magnetically opposite polarities.Type: GrantFiled: April 20, 1995Date of Patent: December 8, 1998Assignee: Nordson CorporationInventors: David L. Sluka, Hassan Iravani, Robert A. Sprenger, deceased
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Patent number: 5834743Abstract: An apparatus and method for fusing intercell connectors to battery cell terminal posts. The apparatus includes inexpensive, non-metallic molds, each having a mold opening and being positionable onto a connector with the mold opening in aligned relation to a terminal post positioned in a connector opening for defining a mold cavity adjacent an end of the terminal post and the connector opening. A selectively positionable induction heating head is provided for locating an induction heating coil in predetermined spaced relation to a terminal post and connector to be fused such that generation of a high frequency, oscillating current in the coil causes melting and fusion of the terminal post and connector with the mold retaining and forming the molten lead. The induction heating head may be manually positionable for use with batteries with different post locations and orientations and includes safety and position locating features.Type: GrantFiled: November 19, 1996Date of Patent: November 10, 1998Assignee: GNB Technologies, Inc.Inventors: David L. Lund, Charles J. DiMarco
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Patent number: 5786575Abstract: A wrap tool having first and second coil regions and flange regions for inducing oscillating magnetic fields to fuse a plastic coupling having heating elements to a substrate. The first and second coil regions are wrapped around a selected plastic coupling and substrate to induce fusion currents causing melting and fusion of plastic pipes inserted into a magnetically energizable pipe coupling. The flange regions of the wrap tool are positioned adjacent each other overlappingly or inner surface to inner surface, permitting opposite current coil portions to cancel the other's magnetic fields and reduce coil inductance.Type: GrantFiled: December 20, 1995Date of Patent: July 28, 1998Assignee: Gas Research InstituteInventors: Randy J. Bleske, Joel D. Finegan
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Patent number: 5786576Abstract: Thermoplastic welding is an emerging technology targeted at significantly reducing the manufacturing cost of aerospace structure by eliminating fasteners and the touch labor associated with fasteners to prepare, install, and inspect the assemblies. Quality welds are highly dependent upon achieving appropriate temperatures everywhere along the bond line. The present invention is a system that uses a secondary coil to detect misalignment between the induction coil and the susceptor which would result in an excessive bond line temperature (in portions of the weld) and to provide control signals for the coil or parasitic compensation to avoid the overheating.Type: GrantFiled: November 28, 1995Date of Patent: July 28, 1998Assignee: The Boeing CompanyInventor: C. David Lunden
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Patent number: 5702667Abstract: Conventional methods for heat treating cylindrical components such as track bushings involve multiple steps. For example, many such methods consist of carburizing, cooling, induction-hardening, quenching, and tempering. The conventional methods have proved to be costly because different heat treating apparatus are required. This causes duplicate handling and wasted manufacturing time. The present invention provides an apparatus 30 for heat treating a bushing 10 simultaneously from an outer peripheral surface 12 and the pair of inner circumferential surfaces 20.Type: GrantFiled: August 16, 1996Date of Patent: December 30, 1997Assignee: Caterpillar Inc.Inventor: Dennis C. Pond
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Patent number: 5686006Abstract: An induction cooking heater comprises an inductor, an inductor support comprising a magnetic material and a protective sheet positioned beneath the support in contact with this support. The support is made of a thermally conductive, electrically insulating material to enable the discharge of calorific energy from the inductor to the protective sheet. Furthermore, with the inductor taking the form of a strand of electrically conductive wires in spiral form, the support has a housing on its upper face that is also spiral shaped, adapted to receiving said strand and improving the thermal transfer.Type: GrantFiled: November 15, 1995Date of Patent: November 11, 1997Assignee: C E P E MInventor: Jean-Yves Gaspard
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Patent number: 5683608Abstract: A die for use in an induction heating workcell incorporates segments of the induction coil in spaced array within a cast ceramic or phenolic body. A peripheral compression frame, typically of phenolic, surrounds the die body and applies a compressive load to the body through lateral and transverse reinforcing rods that are cast into the body. Matched dies close to trap heat in a workpiece at the center of the induction coil.Type: GrantFiled: June 5, 1995Date of Patent: November 4, 1997Assignee: The Boeing CompanyInventors: Marc R. Matsen, Paul S. Gregg, Howard Martinson, Robert Snyder
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Patent number: 5660753Abstract: An apparatus for heating a metal surface to remove a nonferrous thermosetting resin coating bonded to the metal surface. The apparatus uses a power supply device for providing an approximately 75-100 kW signal at approximately 10-40 kHz to the apparatus. A coil assembly device is coupled to the power supply device for producing a high frequency inductive field which will penetrate through the nonferrous thermosetting resin coating with virtually no attenuation and will induce an eddy current of sufficient power in the underlying metal substrate to rapidly heat the interface to a sufficient temperature to immediately destroy the interface bond between the nonferrous thermosetting coating and the metal substrate.Type: GrantFiled: June 16, 1995Date of Patent: August 26, 1997Inventor: David Grant Lingnau
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Patent number: 5451749Abstract: An inductor for inductively heating bearing surfaces of a crankshaft is machined from a block of copper to provide parallel, closely spaced and integrally joined inductor block portions having machined coolant passages therein. The machined inductor is rigidly supported between juxtaposed side plates having portions of the inner surfaces thereof machined to provide recesses which receive the inductor and in which the inductor is clampingly engaged between the plates. Positioning fingers are supported by the side plates to accurately position the active face of the inductor relative to a bearing surface to be heated, and tubular leads extend upwardly between the side plates for connecting the inductor across a source of power. An inlet conduit for coolant extends laterally between the side plates, and the tubular leads provide outlets for coolant flow from the inductor.Type: GrantFiled: December 27, 1993Date of Patent: September 19, 1995Assignee: Tocco, Inc.Inventors: Arthur H. Griebel, William D. West, Jerry R. Dunn
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Patent number: 5448039Abstract: In a billet induction heating device, a plurality of heating coil units having round holes different in diameter from one another are arranged in such a manner that the central axial lines of the round holes are in parallel with one another and are in a vertical plane, and moving means supports the heating coil units thus arranged. Whenever a billet is given which is different in size from the one which has been processed, among from the heating coil units one suitable for the given billet is selected, and the moving means is operated to move the heating coil units until the selected heating coil unit reaches the position where it can accommodate the given billet. This arrangement makes it possible to achieve the replacement of the heating coil unit quickly and readily.Type: GrantFiled: August 26, 1993Date of Patent: September 5, 1995Assignee: Fuji Electric Co., Ltd.Inventors: Sakae Okayama, Yasuyuki Ikeda
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Patent number: 5448038Abstract: An electromagnetic induction heating cooker includes a heating coil situated below a cooking plate and mounted on a mounting plate. An attachment assembly is connected to the mounting plate within the center of the coil. The attachment assembly includes a pair of horizontally projecting pieces which overlie the coil and press downwardly thereagainst. A temperature sensor carried by the holder is spring-biased upwardly into contact with the underside of the cooking plate. The holder carries a thermal fuse for shutting off the coil when a sensed temperature exceeds a reference temperature.Type: GrantFiled: February 24, 1994Date of Patent: September 5, 1995Assignee: Samsung Electronics Co., Ltd.Inventor: Dae-Rae Kim
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Patent number: 5444220Abstract: An asymmetric coil which has an "A" winding on one pole of the "C" core and a "B" winding of opposite helical twist, on the other pole, we can achieve relatively uniform, intense heating between the poles with relatively insignificant heating outside the poles. Only one core winding is active at one time. This coil allows us to heat uniformly to the ends of the susceptors on the ribs without remelting or overheating the welded area under the abutting spar, as FIG. 6 illustrates. The asymmetry provided by the two windings of opposite helical sense and the core design allows us to travel in either direction by activating the appropriate coil.Type: GrantFiled: December 5, 1994Date of Patent: August 22, 1995Assignee: The Boeing CompanyInventors: Karl A. Hansen, Edward C. Weisberg
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Patent number: 5438181Abstract: An apparatus includes (a) a device which is capable of selectively generating heat in electrically-conductive material without substantially generating heat in non-electrically-conductive material, (b) a device capable of heating non-electrically-conductive material, and (c) an insulating shield between the two devices to help focus the energy generated by at least one of the devices.Type: GrantFiled: December 14, 1993Date of Patent: August 1, 1995Assignee: Essex Specialty Products, Inc.Inventors: Curtis L. Volkmann, Frederick A. Buck
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Patent number: 5412182Abstract: An interstitial heater, made of an electrically conductive tube with a wire wound in a toroidal configuration about the tube and connected to a capacitor to form a tank circuit, is driven with a radiofrequency power source at resonance to provide tissue heating by thermal conduction.Type: GrantFiled: April 9, 1992Date of Patent: May 2, 1995Assignee: City of HopeInventor: Kwok W. Chan
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Patent number: 5410134Abstract: A clamp assembly includes a yoke having a rectangular configuration and circumscribes a rectangular space, and a pair of spaced electrically conductive terminal bodies mounted in the rectangular space of the yoke. The terminal bodies are adapted to be connected to corresponding electrical terminals of an induction heating machine. A clamp pad is slidably mounted in the rectangular space of the yoke and is moveable vertically toward and away from the tops of the terminal bodies. An induction coil assembly including a hollow induction coil and a pair of spaced parallel elongated terminal bars is provided, with the terminal bars removably clamped between the clamp pad and the tops of the terminal bodies.Type: GrantFiled: July 25, 1994Date of Patent: April 25, 1995Assignee: L.C. Miller CompanyInventors: Alexander Marcut, Victor E. DeLucia
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Patent number: 5401939Abstract: An electromagnetic induction heater in which magnetic flux diffusing members are fixed to at least two ends of an iron core wrapped with an electric wire to form a coil, and a metal plate is connected to the magnetic flux diffusing members to heat a wide area of the metal plate uniformly. By supplying a commercial low frequency alternating power source of 50-60 Hz to the coil, magnetic flux is generated in the iron core. The magnetic flux, flowing in the magnetic flux diffusing members, is diffused in a longitudinal direction. Diffused magnetic flux flows through the metallic plate to generate Joule heat over the plate. Therefore, the entire surface of the metal plate is heated uniformly. Either a single-phase or three-phase alternating power source is used in this invention.Type: GrantFiled: May 27, 1994Date of Patent: March 28, 1995Assignee: Hidec Corporation Ltd.Inventors: Atsushi Iguchi, Kuniaki Iguchi
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Patent number: 5397876Abstract: A high frequency bolt heater is provided which can heat up the inside of a narrow hole much faster than a conventional bolt heater employing a resistance wire. The high frequency bolt heater includes an induction heating coil made of a copper tube bent in a hairpin fashion and whose shape is made approximately circular in section by pinching a magnet between opposed portions thereof. The heater can be inserted into a hole bored in the axial direction of a metallic bolt. A length of the coil is made approximately equal with that of the bored hole, and the magnet is omitted from a region of the heater which corresponds to a screw portion of the bolt for mounting a nut. An adjustable stopper made of a heat resistant electrical insulator is provided for setting a necessary length of the induction heating coil to be inserted into the hole, and a heat resistant insulator is provided on the surface of the induction heating coil.Type: GrantFiled: January 6, 1994Date of Patent: March 14, 1995Assignees: Mitsubishi Jukogyo Kabushiki Kaishi, Dai-ichi High Frequency Co., Ltd.Inventors: Takijiro Shimamoto, Yoji Morita, Ichiro Shimasaki, Ichiro Matsuura, Tsukasa Maenosono
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Patent number: 5389766Abstract: A snow-melting apparatus of an electromagnetic induction heating type, comprises: a high frequency power source; a pair of conductive cables wound in at least one turn around a segment of each rail and through through-holes which are formed through side walls of the rail, the segment of the rail being defined between two through-holes; and a lead wire interconnecting the power source and the conductive cable, for supplying current from the power source to the conductive cable, thereby heating the rail by the flow of electromagnetic ally induced current in the rail segment.Type: GrantFiled: November 26, 1993Date of Patent: February 14, 1995Assignee: Fuji Electric Co., Ltd.Inventors: Seiichi Takahashi, Ichiro Ideno, Kouji Awatani, Hirotsune Kimura
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Patent number: 5365041Abstract: An induction coil for joining structural members by heating a bonding material disposed between the structural members. The induction coil includes first and second elements disposed in a non-parallel arrangement adjacent one surface and along one side edge of two juxtaposed structural members. In one embodiment, the first and second elements are joined together at adjacent ends. A base and a riser are connected to intermediate spaced ends of the first element for attaching the induction coil to a source of high frequency electrical current. The first and second elements, the base and the riser are formed of hollow, tubular members to form a coolant flow path therethrough.Type: GrantFiled: April 26, 1993Date of Patent: November 15, 1994Assignee: Robotron CorporationInventor: Thomas J. Shank
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Patent number: 5352871Abstract: The invention provides a system and method for joining plastic members including induction heaters fabricated from a conductive wire coated with a ferromagnetic material and providing ratios of at least 4 to 1 between the areas over the spaces between wires and the area of the wires surrounding the open spaces; the heaters being located preferably between plastic members to be joined. The heaters may be located adjacent the two ends of a plastic connector adapted to receive a pipe in at least one and probably two ends with the heaters being activated preferably by induction heating to produce welding of the plastics to one another. One form of heater is fabricated on a hollow cylindrical mandrel having helical grooves in which the wire is wound and having radial holes arranged in axially extending rows spaced circumferentially about the mandrel so the axially extending wires may be spot welded to the wires in the helical grooves at each hole.Type: GrantFiled: February 20, 1991Date of Patent: October 4, 1994Inventors: James B. Ross, Dexter C. Tight, Jr., Charles W. Tinsley, Hideki Kasa
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Patent number: 5336868Abstract: A device for inductively heating flat metal objects, with at least one pair of induction coils which form a gap through which the object is moved. The induction coils have an iron core made up of transformer stampings with grooves in which current conductors are arranged. The iron cores of at least one inductor coil have grooves which run in a zig-zag or undulating fashion along the direction of motion of the object being heated. The maximum angle the grooves make with the direction of movement of the object is 60.degree., and the current conductors are disposed in the grooves so as to follow the zig-zags or undulations thereof. The inductor coils of at least one inductor-coil pair include several side-by-side conductors which are arranged so as to carry current in the same direction along the coil. At least some of the current conductors are arranged for selective independent electrical connection to a source of electrical energy.Type: GrantFiled: February 19, 1992Date of Patent: August 9, 1994Assignee: Otto Junker GmbHInventor: Dieter Schluckebier
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Patent number: 5329085Abstract: A Curie point heater primarily for use in a soldering iron and initially designed to operate with currents in the megahertz range is restructured to operate in the kilohertz range. Further in one embodiment of the heater, the coil exciting the heater is mounted in the handle of the iron.Type: GrantFiled: August 5, 1992Date of Patent: July 12, 1994Assignee: Metcal, Inc.Inventors: Mark J. Cowell, Steven A. Daniel
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Patent number: 5319170Abstract: In the fluid heater disclosed herein, a plurality of thin or ribbon-like conductors are embedded in and link a pair of similar flow paths. An inductor is magnetically coupled to the conductors and is energized with alternating current thereby to induce local currents in the conductors and generate heat which is imparted to fluid passing through the flow paths and over the surfaces of the conductors.Type: GrantFiled: October 20, 1992Date of Patent: June 7, 1994Assignee: Belmont Instrument CorporationInventor: David E. Cassidy