Specific Inductor Configuration Patents (Class 219/672)
  • Patent number: 10648704
    Abstract: A magneto-caloric thermal diode assembly includes a magneto-caloric cylinder with a plurality of magneto-caloric stages. A length of one of the plurality of magneto-caloric stages is different than a length of another of the plurality of magneto-caloric stages. Each of a plurality of thermal stages includes a plurality of magnets and a non-magnetic ring. The plurality of magnets is distributed along a circumferential direction within the non-magnetic ring in each of the plurality of thermal stages. The length of each of the plurality of thermal stages corresponds to a respective one of the plurality of magneto-caloric stages.
    Type: Grant
    Filed: April 18, 2018
    Date of Patent: May 12, 2020
    Assignee: Haier US Appliance Solutions, Inc.
    Inventor: Michael Goodman Schroeder
  • Patent number: 10638555
    Abstract: Aspects and embodiments of systems for fluid transportation using inductive heating are described. In one embodiment, the system includes a first transportation pipe having a first diameter and a second transportation pipe having a second diameter. The first diameter is greater than the second diameter. An augur that causes a fluid flow is within the first transportation pipe. A control circuit is electrically coupled to the first inductive element and the second inductive element, and to a power supply to inductively heat the first transportation pipe and the second transportation pipe.
    Type: Grant
    Filed: June 13, 2017
    Date of Patent: April 28, 2020
    Assignee: Hydra Heating Industries, LLC
    Inventors: Michael Hoffman, Shuping Wang
  • Patent number: 10295226
    Abstract: A vehicle temperature control unit includes an annular temperature control body (12) of magnetocaloric material over and/or around which heat transfer medium flows and a magnetic field arrangement (24), rotatable about an axis of rotation (A), providing magnetic field heating areas (36) and cooling areas (38) between the heating areas (36). A plurality of heat transfer medium flow zones (40), following one another in the circumferential direction are provided with the temperature control body (12), include two heat transfer medium flow zones (40) adjacent to one another that are associated with a heat transfer medium circulation sector (S). Heat input fluid flows through and/or around at least one heat transfer medium flow zone (50) for feeding heat into this heat transfer medium flow zone (50), or/and heat discharge fluid flows through and/or around at least one heat transfer medium flow zone (52) for discharging heat from the flow zone (52).
    Type: Grant
    Filed: April 7, 2016
    Date of Patent: May 21, 2019
    Assignee: Eberspächer Climate Control Systems GmbH & Co. KG
    Inventor: Michael Humburg
  • Patent number: 10143044
    Abstract: A rectangular sheet heating inductor or a multi-turn inductor is provided for induction heat treatment of a strip or slab material that may require a change in the interior opening of the inductor to allow an abnormal region of the material to pass through the interior opening and/or to allow a change in a dimension of the inductor to achieve impedance load matching with a material having variable electromagnetic properties such as a multiphase steel.
    Type: Grant
    Filed: September 20, 2016
    Date of Patent: November 27, 2018
    Assignee: Inductotherm Corp.
    Inventors: Jean Lovens, Michel Fontaine
  • Patent number: 9991098
    Abstract: An apparatus for abatement of gases is provided. The apparatus includes a toroidal plasma chamber having a plurality of inlets and an outlet, and at least one chamber wall. One or more magnetic cores are disposed relative to the toroidal plasma chamber. The plasma chamber confines a toroidal plasma. A second gas inlet is positioned on the toroidal plasma chamber between a first gas inlet and the gas outlet at a distance d from the gas outlet, such that a toroidal plasma channel volume between the first gas inlet and the second gas inlet in the is substantially filled by the inert gas, the distance d based on a desired residence time of the gas to be abated.
    Type: Grant
    Filed: April 10, 2017
    Date of Patent: June 5, 2018
    Assignee: MKS Instruments, Inc.
    Inventors: Xing Chen, Ilya Pokidov, Feng Tian, Ken Tran, David Lam, Kevin W. Wenzel
  • Patent number: 9006624
    Abstract: An induction heating system includes an induction heating coil operable to inductively heat a load with a magnetic field, a detector for detecting a current feedback signal corresponding to a current flowing through the induction heating coil, and a controller for detecting a switching transient in the current feedback signal and determining a resonant frequency of the system based on a characteristic of the switching transient.
    Type: Grant
    Filed: July 22, 2010
    Date of Patent: April 14, 2015
    Assignee: General Electric Company
    Inventors: Daniel Brosnan, Mariano Filippa, Kresimir Odorcic
  • Patent number: 9000336
    Abstract: A device for hardening the surface of a workpiece, wherein an energy supply part and a working part each include a magnetic core, wherein the magnetic cores are at a small distance from each other such that electrical energy is transmitted contactlessly from the energy supply part of the inductor to the working part of the inductor, and wherein the working part includes a heating conductor branch for inductive heating of a section of the surface of the workpiece; a control instrument coupled to the inductor, wherein the control instrument displaces the working part relative to the surface to be hardened and relative to the energy supply part, and wherein the magnetic core of the working part is displaced relative to the magnetic core of the energy supply part; and an electrical energy supply connected to the energy supply part of the inductor.
    Type: Grant
    Filed: October 7, 2010
    Date of Patent: April 7, 2015
    Assignee: SMS Elotherm GmbH
    Inventor: Stefan Dappen
  • Publication number: 20150041456
    Abstract: The induction coil unit for heating a component that is rotationally symmetrical relative to an axis (7), in particular a tool holder (5), comprises a plurality of coils (19) arranged about the axis (7) of the tool holder (5) with pole elements, which are movable radially with respect to the axis (7), which are connected to one another by a common yoke ring (17). Upon excitation of the coils (19) with alternating current, the latter produce a magnetic flux running in the peripheral direction in the tool holder (5) for the inductive heating of the tool holder (5). The induction coil unit (1) can be moved in an oscillating manner by means of a drive (87) in the direction of the axis (7), the pole elements (21) moving in an oscillating manner along the tool holder (5). An induction coil unit of this type is in a position to heat a comparatively large region of the tool holder (5) despite a comparatively small energy requirement and comparatively small dimensions.
    Type: Application
    Filed: September 11, 2012
    Publication date: February 12, 2015
    Applicant: FRANZ HAIMER MASCHINENBAU KG
    Inventor: Franz Haimer
  • Publication number: 20150034630
    Abstract: A modular heat-retaining system for keeping food warm. The system contains a plurality of induction heat retaining units, each of which forms a heat-retaining area, and further contains a common power and control unit having a common power controller and a plurality of connection interfaces for individually connecting and individually activating the induction heat-retaining units. In addition, the heat-retaining system contains one or more operating units, wherein the induction heat-retaining units contain at least one induction coil as part of an induction resonant circuit for generating an alternating magnetic field. The power and control unit contains control means for individual activation of the induction heat-retaining units.
    Type: Application
    Filed: January 5, 2012
    Publication date: February 5, 2015
    Applicant: INDUCS AG
    Inventor: Christian Fuchs
  • Publication number: 20150034631
    Abstract: A device for electrically heating a fluid, in particular for use in an electrically operated motor vehicle, comprising an induction coil, which is integrated in an oscillating circuit and produces an alternating magnetic field, and at least one first inductor, which is positioned within the alternating magnetic field. The inductor can be arranged inside a module, through which a fluid to be heated can flow, and the induction coil is arranged outside the module.
    Type: Application
    Filed: October 20, 2014
    Publication date: February 5, 2015
    Inventors: Michael KOHL, Harri PANKRATZ, Ralph TRAPP
  • Patent number: 8941036
    Abstract: The present invention provides a heating unit capable of easily and inexpensively adjusting total impedance based on tire mold size so that a power source can be used at a high power factor, and a tire heating apparatus using the same. A ferromagnetic metallic member 10a heats a tire mold M1 by heat conduction. An induction heating coil C1 is disposed on the side of the ferromagnetic metallic member 10a opposite the tire mold M1 to induction-heat the ferromagnetic metallic member 10a by generating magnetic field lines. A nonmagnetic conductor 30a is disposed on the side of the induction heating coil C1 opposite the ferromagnetic metallic member 10a to shield the magnetic field lines generated by the induction heating coil C1. A heating unit 100a including these elements heats the tire mold M1 storing a tire.
    Type: Grant
    Filed: September 21, 2007
    Date of Patent: January 27, 2015
    Assignee: Kobe Steel, Ltd.
    Inventors: Kazuto Okada, Hideaki Kuwabara, Hisashi Mitamura, Tomomichi Murata, Masatake Toshima, Yasuhiko Fujieda
  • Patent number: 8912473
    Abstract: A variable-size induction heating plate includes a plurality of windings (10a, 10b, 10c, 10?a, 10?b, 10?c) arranged in a cooking surface. The heating plate includes two sets (10, 10?) of a plurality of windings arranged side-by-side, each set (10, 10?) of windings being adapted in such a way as to form a heating plate, and control elements (12, 12?, 13) which are adapted in such a way as to control the operation of the sets (10, 10?) both in an independent manner and a synchronous manner. Each set of windings is fed by a single current generator (11, 11). The inventive heating plate can be used in an induction cooking surface.
    Type: Grant
    Filed: December 22, 2006
    Date of Patent: December 16, 2014
    Assignee: Fagorbrandt SAS
    Inventor: Alain Roux
  • Patent number: 8912472
    Abstract: An apparatus for hardening a spring having a helical or beehive shape. The apparatus has a rotation support system and an induction heating system. The rotation support system is designed to support the spring while the spring is heated by the induction heating system. The induction heating system has an induction coil system having a coil system. The coil system has a spaced region designed to receive the spring and to heat the spring while the spring is supported on the rotation support system.
    Type: Grant
    Filed: July 19, 2011
    Date of Patent: December 16, 2014
    Assignee: Barnes Group Inc.
    Inventors: Scott Kurylo, Mehieddine Rababeh
  • Patent number: 8907257
    Abstract: The present invention relates to a contactlessly chargeable heater. In one example, the contactlessly chargeable heater includes: an induction patch emitting magnetic field by means of current applied to an inner coil; and a heating body, receiving the magnetic field from the charging patch to perform a contactless charging operation, and including a conductive metal yarn for emitting heat via the power generated through the contactless charging operation. The conductive metal yarn is woven together using threads within the heating body.
    Type: Grant
    Filed: December 29, 2010
    Date of Patent: December 9, 2014
    Assignee: Korea Institute of Industrial Technology
    Inventor: Gi Soo Chung
  • Patent number: 8890042
    Abstract: The present invention includes: a plurality of induction heating coils (11, 12, 13) which are disposed adjacently; capacitors (21, 22, 23) each of which is connected in series thereto; a plurality of inverters (30, 35, 31) each of which applies a high frequency voltage converted from a DC voltage to each series resonant circuit of the induction heating coil and the capacitor; and a control circuit (50) which operates the plurality of the inverters with a same frequency and current synchronization, controls so that a phase difference becomes minimal at a specific inverter, which supplies the maximum power to the plurality of the induction heating coils, between the high frequency voltage generated therefrom, and a resonant current flowing the series resonant circuit, and set a DC power supply voltage Vdc applied to the plurality of the inverters so that the output voltages (Vinv) become greater than mutual induction voltages (Vm).
    Type: Grant
    Filed: November 2, 2011
    Date of Patent: November 18, 2014
    Assignee: Mitsui Engineering & Shipbuilding Co., Ltd.
    Inventors: Naoki Uchida, Keiji Kawanaka, Takahiro Ao
  • Publication number: 20140332176
    Abstract: Various embodiments provide apparatus and methods for melting materials and for containing the molten materials within melt zone during melting. Exemplary apparatus may include a vessel configured to receive a material for melting therein; a load induction coil positioned adjacent to the vessel to melt the material therein; and a containment induction coil positioned in line with the load induction coil. The material in the vessel can be heated by operating the load induction coil at a first RF frequency to form a molten material. The containment induction coil can be operated at a second RF frequency to contain the molten material within the load induction coil. Once the desired temperature is achieved and maintained for the molten material, operation of the containment induction coil can be stopped and the molten material can be ejected from the vessel into a mold through an ejection path.
    Type: Application
    Filed: July 29, 2014
    Publication date: November 13, 2014
    Inventors: Theodore A. Waniuk, Joseph Stevick, Sean O'Keeffe, Dermot J. Stratton, Joseph C. Poole, Matthew S. Scott, Christopher D. Prest
  • Patent number: 8884200
    Abstract: An openable induction coil is provided. An electromagnetically shielded inductor assembly can be formed from the openable induction coil and an electromagnetically shielded enclosure into which the coil can be inserted. The induction coil can be pivoted open while in the shielding enclosure without complete disassembly of the enclosure. In some examples of the invention, a dynamic “curtain” of a gas is injected through spaces between opening portions of the coil and adjacent sections of the shielding enclosure, and into the interior of the induction furnace formed by the openable induction coil when it is in the closed position.
    Type: Grant
    Filed: September 27, 2009
    Date of Patent: November 11, 2014
    Assignee: Inductotherm Corp.
    Inventor: Jean Lovens
  • Patent number: 8866053
    Abstract: A permanent magnet thermal generator having a rotating chamber with an attached optionally rotational heat element in close proximity to one or more permanent magnets. The relative motion of the heat element to the magnetic flux from the magnets results in heat generation and in some cases in levitation. Clothe driers, air furnaces, water heaters and other systems incorporating a permanent magnet thermal generator are also set forth.
    Type: Grant
    Filed: September 9, 2010
    Date of Patent: October 21, 2014
    Inventor: Elberto Berdut-Teruel
  • Publication number: 20140295100
    Abstract: A modular electric induction heating and coating apparatus and method for coating, heating and/or coating and heating (and vice versa) the exterior surface of a pipe section within a pipe treatment region is provided. The apparatus comprises an interchangeable central main frame assembly removably attached to an outer drive frame assembly on each side of the central main frame assembly. An interchangeable induction coil assembly can be mounted in a coil main frame assembly of the central main frame assembly. The coil main frame assembly can close around a pipe section for electric induction heating of the pipe section within the pipe treatment region via a driver system in a central top drive frame assembly. The outer drive frame assemblies include mounting and rotational drive assemblies for interchangeable coating head cartridges that can coat the section of the pipe in the pipe treatment region.
    Type: Application
    Filed: May 2, 2013
    Publication date: October 2, 2014
    Applicant: Inductotherm Heating & Welding Limite
    Inventors: Stephen William BASKERVILLE, Derek HUMPHRIES, John W. BETTERIDGE, William FENWICK, Michael LEE
  • Publication number: 20140263289
    Abstract: A production method produces a cable core for an induction cable in a simple and simultaneously reliable manner. In the method, a raw conductor is fed continuously to a processing machine and separated in a recurring manner at specified length positions at a separating point so that there are two wire ends. The ends are then pulled apart from each other in the longitudinal direction of the cable and then connected again by a connector which has an insulating spacer which separates the wire ends from each other by a specified distance. The connector is preferably configured as an injection molded part, in particular using the online process. A plurality of such cable cores are connected to each other via a cabling process and then enclosed by a cable sleeve to produce the induction cable.
    Type: Application
    Filed: June 2, 2014
    Publication date: September 18, 2014
    Applicant: LEONI KABEL HOLDING GMBH
    Inventors: JENS MOSEBACH, MICHAEL DREINER
  • Publication number: 20140254621
    Abstract: Apparatus and method are provided for electric induction heating and/or stirring of a molten electrically conductive composition in a containment vessel with the apparatus being removably insertable in the molten composition. An induction coil embedded in refractory or a coating is submerged in the composition and used to heat and/or stir the molten composition either externally or internally to the refractory or coating.
    Type: Application
    Filed: May 25, 2014
    Publication date: September 11, 2014
    Applicant: Inductotherm Corp.
    Inventors: Jean LOVENS, Michel FONTAINE, Bernard M. RAFFNER
  • Patent number: 8829399
    Abstract: A method and device for heating or hardening at least an axial segment of a rotationally-symmetric surface of a work piece includes rotating the work piece about its rotational axis and moving a peripheral portion of an inductor along a longitudinal profile of the axial segment of the rotating work piece with a constant spacing between the peripheral portion and the axial segment. At least a portion of the movement of the peripheral portion is composed of a first vector component in the direction of the rotational axis and a second component extending perpendicularly to the first vector component. The peripheral portion has a length in the rotational axis direction that is less the length of the axial segment in the rotational axis direction.
    Type: Grant
    Filed: March 11, 2009
    Date of Patent: September 9, 2014
    Assignee: Aktiebolaget SKF
    Inventors: Marco Burtchen, Michael Jung
  • Publication number: 20140246423
    Abstract: Provided are a high-frequency heat treatment coil that can be assembled with high dimension accuracy and can perform high-quality heat treatment, a method of producing such a high-frequency heat treatment coil, a constant velocity universal joint subjected to high-quality heat treatment, and a drive shaft and a propeller shaft using such a constant velocity universal joint. The method is provided to produce a high-frequency heat treatment coil including a heating section (71a, 71b, 71c) for heating a heat treatment portion of an outer joint member (51) for a constant velocity universal joint. The heating section (71a, 71b, 71c) is formed by machining in an integrated manner, and the heating section (71a, 71b, 71c) is joined to another section to complete the high-frequency heat treatment coil.
    Type: Application
    Filed: November 2, 2012
    Publication date: September 4, 2014
    Applicant: NTN CORPORATION
    Inventors: Takeshi Shimasawa, Shintaro Suzuki, Atsushi Tokuda
  • Patent number: 8816259
    Abstract: A system and method of restoring material properties is disclosed. A subject material may have one or more of its material properties restored by contacting a packed bed of a reactive material contained within a container with the subject material in which material properties are desired to be restored. The packed bed and the subject material may be heated to restore the material properties. The packed bed may be formed from boron, silicon or other appropriate materials. An inert atmosphere system may have an argon injection system or a helium injection system in communication with the container. A deoxidizing system may be in communication with the container for creating a vacuum within the container or injecting hydrogen into the container.
    Type: Grant
    Filed: April 6, 2012
    Date of Patent: August 26, 2014
    Assignee: Siemens Aktiengesellschaft
    Inventor: Gerald J. Bruck
  • Publication number: 20140231415
    Abstract: An induction heating system includes a power source and an induction head. The converter output is at a voltage that is not greater than the voltage applied to the coil. The induction head includes a housing that houses a conductive coil disposed to induce heat in a workpiece and the coil is wound to be tuned to the output power. The coil is wound in a stacked spiral pattern with at least two turns in each layer. A flux concentrator is disposed about the coil with a potting compound around the concentrator and coil. Spacers maintain a desired separation between the head and the workpiece. The coil is a tube carrying a coolant. The head includes a wear surface that prevents contact of the coil and the workpiece, and a thermal insulator between the coil and wear surface. A non-contact temperature sensor is mounted to the housing.
    Type: Application
    Filed: February 19, 2013
    Publication date: August 21, 2014
    Applicant: Illinois Tool Works Inc.
    Inventors: Paul D. Verhagen, Tiffany Anne Carter, Alan Dale Sherrill
  • Patent number: 8735783
    Abstract: Apparatus and method are provided for electric induction heating and/or stirring of a molten electrically conductive composition in a containment vessel with the apparatus being removably insertable in the molten composition. An induction coil embedded in refractory or a coating is submerged in the composition and used to heat and/or stir the molten composition either externally or internally to the refractory or coating.
    Type: Grant
    Filed: June 20, 2010
    Date of Patent: May 27, 2014
    Assignee: Inductotherm Corp.
    Inventors: Jean Lovens, Michel Fontaine, Bernard M. Raffner
  • Patent number: 8716636
    Abstract: An arrangement for induction hardening a part including a pair of separate inductors electrically isolated from each other and configured to substantially surround a part when brought into close juxtaposition with each other. The inductor sections are powered by respective secondary inductor loops brought into close juxtaposition with a primary inductor loop connected to an ac power source which induces an ac current in each inductor section.
    Type: Grant
    Filed: October 4, 2010
    Date of Patent: May 6, 2014
    Inventors: John C. Bollman, Richard J. Roth
  • Publication number: 20140110402
    Abstract: Methods and apparatus for reducing the occurrence of metal whiskers on surfaces are disclosed herein. In particular, the present disclosure teaches providing at least one source of electromagnetic energy to emit energy to reduce the occurrence of metal whiskers on a surface.
    Type: Application
    Filed: October 19, 2012
    Publication date: April 24, 2014
    Applicant: THE BOEING COMPANY
    Inventor: THE BOEING COMPANY
  • Patent number: 8698054
    Abstract: An induction heating inductor and perforated susceptor are formed as an integral unit to provide a low cost, physically stable, efficient, and easily cleaned unit.
    Type: Grant
    Filed: September 16, 2010
    Date of Patent: April 15, 2014
    Inventor: Bernard C. Lasko
  • Publication number: 20140093599
    Abstract: The present invention is one that heats the inside of the spinning pack in a short period of time while keeping temperature of an outer circumferential part of a spinning pack less than a maximum allowable temperature, and provided with: a magnetic path forming member that forms a magnetic path with a spinning pack arrangement space where the spinning pack is arranged to occupy the space and be positioned intermediate respective ends of the magnetic path forming member that border the space; and a magnetic flux generating winding that is provided so as to be wound to surround the spinning pack arrangement space.
    Type: Application
    Filed: September 30, 2013
    Publication date: April 3, 2014
    Applicant: TOKUDEN CO., LTD.
    Inventors: Toru Tonomura, Yasuhiro Fujimoto
  • Publication number: 20140007428
    Abstract: A heating device for heating a hollow component may include at least one inner induction coil and at least one outer induction coil, each configured to be heated. At least one element may be configured to influence a magnetic field formed between the inner and the outer induction coil during the operation of the heating device. The element may be arranged between the inner and the outer induction coils. Regions of the hollow component may be thinner and the thinner regions may be configured to heat more quickly than the remaining thicker regions. The thinner and thicker regions of the component may allow even heating of the component to be achieved.
    Type: Application
    Filed: December 7, 2011
    Publication date: January 9, 2014
    Applicant: Mahle International GmbH
    Inventors: Christoph Beerens, Antonio Menonna, Almir Zahirovic
  • Publication number: 20140008356
    Abstract: The present invention includes: a plurality of induction heating coils (11, 12, 13) which are disposed adjacently; capacitors (21, 22, 23) each of which is connected in series thereto; a plurality of inverters (30, 35, 31) each of which applies a high frequency voltage converted from a DC voltage to each series resonant circuit of the induction heating coil and the capacitor; and a control circuit (50) which operates the plurality of the inverters with a same frequency and current synchronization, controls so that a phase difference becomes minimal at a specific inverter, which supplies the maximum power to the plurality of the induction heating coils, between the high frequency voltage generated therefrom, and a resonant current flowing the series resonant circuit, and set a DC power supply voltage Vdc applied to the plurality of the inverters so that the output voltages (Vinv) become greater than mutual induction voltages (Vm).
    Type: Application
    Filed: November 2, 2011
    Publication date: January 9, 2014
    Applicant: MITSUI ENGINEERING & SHIPBUILDING CO., LTD.
    Inventors: Naoki Uchida, Keiji Kawanaka, Takahiro Ao
  • Patent number: 8592735
    Abstract: An induction heating apparatus for controlling the temperature distribution for heating a metal plate irrespective if it has a small thickness, is magnetic or nonmagnetic, and capable of coping with a change in the width of the plate, or meandering of the plate.
    Type: Grant
    Filed: February 15, 2008
    Date of Patent: November 26, 2013
    Assignee: Nippon Steel & Sumitomo Metal Corporation
    Inventor: Yoshiaki Hirota
  • Publication number: 20130259546
    Abstract: A heating device includes a magnetic-field generating unit that generates an alternating-current magnetic field, an endless belt, and a heat transfer unit that includes a heat storage layer, a thermosensitive layer, and a diffusion layer. The thermosensitive layer extends so as to separate the magnetic-field generating unit and the heat storage layer from each other, and forms a magnetic path that allows a magnetic flux of the alternating-current magnetic field to pass therethrough in a direction in which the thermosensitive layer extends at a temperature below a Curie temperature and a magnetic path that allows the magnetic flux to extend therethrough and reach the heat storage layer at a temperature higher than or equal to the Curie temperature. The diffusion layer has a higher thermal conductivity than thermal conductivities of the thermosensitive layer and the heat storage layer, and diffusing heat of the belt.
    Type: Application
    Filed: August 3, 2012
    Publication date: October 3, 2013
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Yasutaka NAITO, Shigehiko HASEBA, Kazuyoshi ITOH
  • Patent number: 8543178
    Abstract: An induction heating apparatus that can operate at current frequencies of greater than 60 Hz and at least 1 kW. The induction heating apparatus includes a high frequency power supply, a superconductive induction coil, and a fluid cooling system. A fluid cooling system is designed to cause a cooling fluid to flow at least partially about and/or through the superconductive induction coil.
    Type: Grant
    Filed: August 7, 2008
    Date of Patent: September 24, 2013
    Assignee: Ajax Tocco Magnethermic Corporation
    Inventors: Theodore E. Burke, Frank Li
  • Patent number: 8536498
    Abstract: An induction heating apparatus for heating a traveling metal plate includes an induction coil for surrounding the metal plate. The induction coil includes an upper induction coil for being located above the metal plate and a lower induction coil for being located below the metal plate. The upper and lower induction coils are spaced from each other in a longitudinal direction of the metal plate a constant distance across a transverse direction of the metal plate. Each of the upper induction coil and the lower induction coil is arranged obliquely at an edge area of the metal plate so as to form an oblique angle with the transverse direction of the metal plate.
    Type: Grant
    Filed: February 9, 2006
    Date of Patent: September 17, 2013
    Assignee: Nippon Steel & Sumitomo Metal Corporation
    Inventor: Yoshiaki Hirota
  • Publication number: 20130220997
    Abstract: An induction heating device and method are disclosed. The device may include a support plate and a coil assembly and a plurality of ferrite bars or the like interposed between the coil assembly and the support plate. Additionally, a central polymeric element may be directly in contact with and interposed between the coil assembly and the support plate. The central element may have a plurality of radial seats configured for engagement with at least one end of the ferrite bars, the seats are configured to locate the bars in a predetermined position.
    Type: Application
    Filed: February 25, 2013
    Publication date: August 29, 2013
    Applicant: WHIRLPOOL CORPORATION
    Inventor: Whirlpool Corporation
  • Publication number: 20130206751
    Abstract: A method for heating surfaces includes heating the surface of a hole by inserting a magnet cylinder into the hole and rotating the magnet cylinder, heating the surface of a hole by inserting a magnet stack into the hole and reciprocating the magnet stack, or heating a selected area of a workpiece surface by positioning a magnet disc adjacent the selected area and rotating the magnet disc. In each case, eddy currents are produced, inducing heating of the surface.
    Type: Application
    Filed: September 23, 2011
    Publication date: August 15, 2013
    Applicant: THE TIMKEN COMPANY
    Inventors: Stephen B. Fitch, William Stuehr, John Gadus
  • Patent number: 8509282
    Abstract: An improved melting furnace including a crucible and a plurality of parallel conductors of identical height surrounding the crucible having at least one descending portion (9) and one ascending portion (10). The benefit from this arrangement is that the conductors all have a portion located at each heating height which guarantees density uniformity of the currents flowing in the conductors even if the load of the crucible has superimposed regions for which the electrical resistivity is different.
    Type: Grant
    Filed: September 14, 2006
    Date of Patent: August 13, 2013
    Assignees: Commissariat a l'Energie Atomique, Areva NC
    Inventor: Christian Ladirat
  • Publication number: 20130200070
    Abstract: A multi-layer, multi-turn structure for an inductor having a plurality of conductor layers separated by layers of insulator is described. The inductor further comprises a connector electrically connected between the conductor layers. The structure of the inductor may comprise a cavity therewithin. The structure of the inductor constructed such that electrical resistance is reduced therewithin, thus increasing the efficiency of the inductor. The inductor is particularly useful at operating within the radio frequency range and greater.
    Type: Application
    Filed: March 12, 2013
    Publication date: August 8, 2013
    Applicant: NuCurrent, Inc.
    Inventor: NuCurrent, Inc.
  • Patent number: 8502122
    Abstract: The invention provides an induction heating system and method of using it for heating a metal plate. The induction coil of the induction heating system includes sections each having conductors at front and back surfaces of the metal plate, which are arranged such that at least a one of the front or back surface conductor has a part slanted in the width direction of the metal plate, and vertical projections of the conductors onto the metal plate do not overlap at the center of the metal plate but overlap outside the edges of the metal plate. In addition, front conductors from adjacent sections are spaced differently as back conductors. The induction heating system allows for better control of the heating temperature distribution regardless of the metal plates thickness and magnetic properties, especially temperature distributions at the edges of the metal plate.
    Type: Grant
    Filed: April 16, 2008
    Date of Patent: August 6, 2013
    Assignee: Nippon Steel & Sumitomo Metal Corporation
    Inventor: Yoshiaki Hirota
  • Publication number: 20130180980
    Abstract: An electromagnetic oven may include a housing and a food heating chamber carried by the housing. The food heating chamber may have a pair of opposing ends with an enlarged width medial portion therebetween. The electromagnetic oven may include a radio frequency (RF) source carried by the housing, and a spirally wound electrical conductor surrounding the food heating chamber and coupled to the RF source. The spirally wound electrical conductor may be configured to generate magnetic fields within the food heating chamber that are parallel with an axis thereof.
    Type: Application
    Filed: January 13, 2012
    Publication date: July 18, 2013
    Applicant: Harris Corporation
    Inventor: Francis Eugene Parsche
  • Patent number: 8476562
    Abstract: An inductive heater humidifier for heating fluids is provided by the present disclosure. The humidifier includes a reservoir having a ferromagnetic bottom plate. The reservoir is disposed on top of a non-metallic cover plate, which rests on a topless ferrite base. The ferrite base includes induction coil for generating heat. The induction coil is energized to produce eddy currents that generate heat, which is convectively transferred to the reservoir via the bottom plate to heat fluid in the reservoir.
    Type: Grant
    Filed: June 4, 2010
    Date of Patent: July 2, 2013
    Assignee: Watlow Electric Manufacturing Company
    Inventor: Cal Swanson
  • Patent number: 8475610
    Abstract: A system and method of induction heat treating a gear includes a workstation. The workstation has a power source, an inductor coil, and a rotational mechanism. The gear is induction heat treated at a first portion of the gear and a second portion of the gear remains untreated by induction hardening. The gear has an inner surface. The inner surface includes the first portion and the second portion. The first portion has a first width. The second portion has a second width. The inductor coil includes at least one heating loop and at least one non-heating loop. The inductor coil is energized to a predetermined frequency to create an alternating magnetic field, where the alternating magnetic field developed in the heating loop induces an eddy current in the first portion of the gear.
    Type: Grant
    Filed: October 5, 2010
    Date of Patent: July 2, 2013
    Assignee: GM Global Technology Operations LLC
    Inventors: Madhu Sudan Chatterjee, William Irwin Stuehr
  • Publication number: 20130153568
    Abstract: The succesful use of lithium vapor in an extreme ultraviolet (EUV) light source depends upon an intense localized heat source at the center of conical structures that evaporate, condense and re-supply liquid lithium. Induction heating of a hollow structure with toroidal topology via an internal helical field coil, can supply intense heat at its innermost radius. The resulting slim radio frequency heated structure has high optical transmission from a central EUV producing plasma to collection mirrors outside of the structure, improving EUV source efficiency and reliability.
    Type: Application
    Filed: December 14, 2011
    Publication date: June 20, 2013
    Applicant: PLEX LLC
    Inventor: Malcolm W. McGeoch
  • Publication number: 20130140300
    Abstract: A magnetic induction heater uses a stationary target which is electrically conductive. A plurality of stationary magnets with fixed poles are positioned near the target to induce at least a first and a second magnetic field in the target, where the first and second magnetic fields are different. A shuttering device alternately blocks or allows the magnetic fields from the magnets to reach the target. The shuttering device is activated to alternately allow and block the first and second magnetic fields from the target, such that the target is exposed to varying magnetic fields to produce heat.
    Type: Application
    Filed: December 4, 2012
    Publication date: June 6, 2013
    Inventor: Robert Paul Cummings
  • Patent number: 8450664
    Abstract: An apparatus for heating a target comprises a radio frequency heating fork having two substantially parallel tines, the substantially parallel tines electrically connected at a loop end of the radio frequency heating fork, and the substantially parallel tines separated at an open end of the radio frequency heating fork, and a feed coupler connection, the feed coupler connection connecting a power source across the substantially parallel tines of the radio frequency heating fork. The application of power across the substantially parallel tines of the radio frequency heating fork results in induction heating near the loop end of the radio frequency heating fork, and dielectric heating near the open end of the radio frequency tuning fork. A target can be positioned relative to the heating fork to select the most efficient heating method. The heating fork can provide near fields at low frequencies for deep heat penetration.
    Type: Grant
    Filed: July 13, 2010
    Date of Patent: May 28, 2013
    Assignee: Harris Corporation
    Inventor: Francis Eugene Parsche
  • Publication number: 20130092681
    Abstract: A heat generator comprises a rotatable magnetic field and a heat exchanger (26) including a fluid path (45) for water set into an electrically conducting disc. An entry to and exit from the fluid path is provided for the water. Heat generated by rotating the magnetic field is transferred to water passing though the fluid path in the electrically conducting disc.
    Type: Application
    Filed: June 16, 2010
    Publication date: April 18, 2013
    Inventor: Douglas Nangle
  • Patent number: 8410408
    Abstract: An induction heating unit enabling to attaching coil on coil attaching surface of bobbin with a high degree of accuracy, and a fixing device capable of maintaining the distance between the coil and the member to be heated at a high degree of accuracy, ensuring uniformity of temperature distribution of the member to be heated, rising temperature at a high speed, and enhancing quality of fixation. In an induction heating unit 30 including a magnetizing coil 39 attached on a coil bobbin 38 which is disposed outside of annular body 19 to be heated, the unit including: a layer of elastic adhesive 44a provided on the outer surface of the coil bobbin 38; a magnetizing coil 39 provided on the layer of elastic adhesive 44a, the magnetizing coil 39 being wound beforehand following an attaching surface; and a layer of elastic adhesive 44b provided on the magnetizing coil 39.
    Type: Grant
    Filed: April 19, 2007
    Date of Patent: April 2, 2013
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Hirotaka Kanou, Noboru Yonekawa
  • Patent number: 8395098
    Abstract: An induction cookware comprising: a cooking body containing an inner pot inside, an insulation material disposed between the cooking body and the inner pot for maintaining the temperature of the inner pot. An induction coil is disposed in the bottom of the cooking body and with an extra magnetic field, the induction coil can generate AC current. The current flows through an electric heating tube connected to the bottom of the inner pot so as to heat the heating tube. Thereby, the heating tube directly transfer the heat to the inner pot for reducing the heat from transpiration. The structure of a cooking body with an inner pot inside can heat and slow cook the food inside the inner pot simultaneously, thus can add the delicious taste of the food and save the energy.
    Type: Grant
    Filed: November 12, 2009
    Date of Patent: March 12, 2013
    Assignee: Tsann Kuen Enterprise Co., Ltd.
    Inventors: Chih-Jung Pan, Shun-Yung Chang, Kuo-Liang Lee, Chun Horn Kuo, Ling-Chin Chao