Planar Coil Patents (Class 219/675)
  • Patent number: 8941037
    Abstract: A substrate processing apparatus that can accurately control the temperature of a focus ring without causing abnormal electric discharge and the back-flow of radio frequency electrical power during the application of radio frequency electrical power. A wafer is mounted on a mounting stage disposed in a housing chamber. An annular focus ring is mounted on the mounting stage in such a manner as to surround the peripheral portion of the mounted wafer. The pressure in the housing chamber is reduced, radio frequency electrical power is applied to the mounting stage, and the focus ring generates heat by itself.
    Type: Grant
    Filed: December 5, 2007
    Date of Patent: January 27, 2015
    Assignee: Tokyo Electron Limited
    Inventors: Daisuke Hayashi, Kazuya Nagaseki
  • 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
  • Publication number: 20140299594
    Abstract: An electromagnetic oil tank heating unit and an electromagnetic oil tank heating system comprising multiple units of electromagnetic oil tank heating units is provided. Each electromagnetic oil tank heating unit comprises a generator capable of generating high frequency electrical current connected to a transformer and a cooling unit, an induction plate with induction coil embedded therein, connected to the transformer and at least one cooling unit, providing cooling to the transformer and the induction plate. The generator, the transformer, the induction plate and the cooling unit are arranged on a frame equipped with wheels to permit mobility of the unit to allow moving the heating unit to a specific location along the length of an oil tank. The frame is configured to include a mechanical means allowing the induction plate supported thereon to move up and down, and forward and backward relative to the oil tank.
    Type: Application
    Filed: April 9, 2013
    Publication date: October 9, 2014
    Applicant: PTT Public Company Limited
    Inventors: Wichapun Weerapakkaroon, Cherdpong Jomdecha, Dayin Jearsiripongkul, Chalermkiat Jirarungsatian
  • Patent number: 8803046
    Abstract: Apparatus and method are provided for electric induction heat treatment of electrically conductive thin strip material. Multiple series-connected coil loops, each having a pole pair, are provided in each of a top and bottom induction coil, which are positioned mirror image to each other. The top and bottom induction coils form a transverse flux induction heat treatment apparatus. A separate flux concentrator is provided over and on the side of each pole. The thin strip material passes between the poles of the top and bottom induction coils and the flux concentrators associated with each of the poles.
    Type: Grant
    Filed: August 9, 2010
    Date of Patent: August 12, 2014
    Assignee: Radyne Corporation
    Inventors: Gregg G. Warner, James D. Parker, John Justin Mortimer
  • Publication number: 20130270260
    Abstract: In an induction heating coil according to the present invention, in order to reduce heat losses for increasing the thermal efficiency and, also, in order to improve the heat resistance for ensuring safety, with a simple structure, a coil portion for performing induction heating on an object to be heated is constituted by a plurality of conductor wires which are made of a metal conductor and are wound spirally in substantially the same plane, and a space portion having at least an adhesive property and an insulation property which is adapted to adhere and secure adjacent conductor wires of the plurality of conductor wires wound spirally, with predetermined spacing provided therebetween, such that the conductor wires form an integrated disk shape.
    Type: Application
    Filed: December 1, 2011
    Publication date: October 17, 2013
    Applicant: PANASONIC CORPORATION
    Inventors: Takehiko Shigeoka, Akira Kataoka, Takeshi Kitaizumi, Masayo Haji
  • Publication number: 20130248517
    Abstract: An induction heating cooking apparatus and a control method thereof are provided. A vessel can be effectively heated by using a plurality of heating coils regardless of a position of the vessel. By connecting a plurality of heating coils to a smaller amount of inverters through relays, only a heating coil on which a vessel is placed, among the plurality of heating coils, can be heated. Also, by connecting the heating coils in series, a current flowing in the heating coil can be lowered, and thus, a rated current of the inverter can be lowered. Also, by connecting relays and heating coils such that a larger amount of heating coils are operated, while minimizing the amount of inverters, manufacturing cost can be reduced, operation efficiency can be increased, and stability of the cooking apparatus can be enhanced.
    Type: Application
    Filed: March 15, 2013
    Publication date: September 26, 2013
    Inventors: Hyunwook MOON, Byeongwook PARK
  • 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
  • Publication number: 20130140299
    Abstract: A heating coil includes a pair of linear lead portions adapted to be connected to a power supply, and a ring-shaped or coil-shaped head portion having end portions connected to the lead portions respectively. A flow path through which a cooling medium flows is formed inside the lead portions and the head portion. An outer circumferential surface of the head portion has a circular or elliptical cross section and is configured to face a heating target portion of an inner circumferential surface of a work extending, the heating target portion extending in a circumferential direction of the work. Each of the lead portions has a straight side portion in a plane intersecting a longitudinal direction of the lead portions, the straight side portions of the lead portions being arranged in proximity to each other.
    Type: Application
    Filed: December 5, 2012
    Publication date: June 6, 2013
    Applicant: NETUREN CO., LTD.
    Inventor: NETUREN CO., LTD.
  • Patent number: 8440944
    Abstract: An induction heating element including a circular inductor coil that has a circular outer contour and a ferrite element arrangement that has at least one ferrite element with a radially outer edge. At least at one curvature point, the radially outer edge of the ferrite element is curved to a greater degree than the circular outer contour of the inductor coil.
    Type: Grant
    Filed: January 2, 2009
    Date of Patent: May 14, 2013
    Assignee: BSH Bosch und Siemens Hausgeraete GmbH
    Inventors: Jesus Acero Acero, Rafael Alonso Esteban, Adolfo Arnal Valero, Ruben Braulio Martinez, Claudio Carretero Chamarro, Ignacio Garde Aranda, Pablo Jesus Hernandez Blasco
  • Publication number: 20130112684
    Abstract: In an induction heating device having an induction coil for an induction hob, the induction coil may be of flat or planar design and have at least one peripheral coil turn comprising coil wire. The outer contour of the induction coil or the outermost coil turn may be approximately trapezoidal having two sides of equal length which are situated opposite one another and may be straight, and having two short sides of differing length between the sides of equal length.
    Type: Application
    Filed: September 21, 2012
    Publication date: May 9, 2013
    Applicant: E.G.O. Elektro-Geratebau GmbH
    Inventor: E.G.O. Elektro-Gerätebau GmbH
  • Patent number: 8056210
    Abstract: A sleeve portion is inserted into a hole portion of a base bracket on which an adhesive of heat cure type is applied while a rotor portion and a stator portion are retained by a position determining jig. Then, the sleeve portion is initially affixed to the base bracket by a high frequency induction heating of an induction coil. Then, the initial affixation is cured completely in an oven. Since the adhesive of heat cure type is used, generation of outgass will be minimized and a manufacturing cost of the motor having such components will be reduced.
    Type: Grant
    Filed: September 25, 2007
    Date of Patent: November 15, 2011
    Assignee: Nidec Corporation
    Inventors: Masato Gomyo, Yoichi Sekii
  • Patent number: 7835681
    Abstract: An induction heating device of the invention is made to have a two-layer structure in which at an end of a magnetic core of an induction current generating coil, a litz wire of outside three turns is stacked on a litz wire of inside three turns. The width of a joint portion between plural induction current generating coils is made narrow, and a mutual induction current generated at the joint portion is reduced. Further, the whole length of the litz wire is shortened without changing the length of the magnetic core of the inductor current generating coil.
    Type: Grant
    Filed: April 17, 2007
    Date of Patent: November 16, 2010
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Tec Kabushiki Kaisha
    Inventors: Osamu Takagi, Satoshi Kinouchi, Yoshinori Tsueda, Toshihiro Sone
  • Publication number: 20100264134
    Abstract: A heating apparatus for induction heating is disclosed. The heating apparatus may comprise a bearing ring, at least one bearing element disposed in the bearing ring, and a braze material adjacent to the at least one bearing element and the bearing ring. The heating apparatus may additionally comprise an inductor positioned radially adjacent to at least a portion of the bearing ring. A current source may be electrically coupled to the inductor. A bearing orienting member may also abut a surface of the at least one bearing element. The bearing orienting member may orient a surface of the at least one bearing element. A heating method is also disclosed.
    Type: Application
    Filed: April 16, 2009
    Publication date: October 21, 2010
    Applicant: US Synthetic Corporation
    Inventors: S. Barrett Peterson, Timothy N. Sexton, Curtis M. Simons, Troy C. Campbell
  • Patent number: 7755009
    Abstract: Multiple solid materials are introduced to a mixing vessel in defined proportion. They are melted by an electromagnetic induction heated susceptor and mixed simultaneously by the shearing action at the melt face of a second rotating susceptor. Material compounding takes place at the application site. Varying the physical structure of the susceptor or multiple susceptors processes materials of differing initial melt viscosity and particle size. Non-melting particulate material can be included in the mix. Reactive components can be combined at the application site.
    Type: Grant
    Filed: February 11, 2008
    Date of Patent: July 13, 2010
    Inventor: Bernard Lasko
  • Patent number: 7671307
    Abstract: A transversal field heating installation for inductively heating flat objects transported in an advancing direction includes at least one inductor unit that extends across the width of the flat object. The inductor unit has at least two superimposed inductor layers parallel to the plane of the flat object. These inductor layers can be independently displaced transversally in relation to the advancing direction of the flat object, and each have two inductor sections with two parallel interspaced base limbs extending transversally in relation to the advancing direction and one lateral limb. Each inductor layer has lateral limb per strip edge of the flat object. The inductor sections of an inductor layer can be independently displaced transversally in relation to the advancing direction of the flat object.
    Type: Grant
    Filed: March 18, 2004
    Date of Patent: March 2, 2010
    Assignee: Universitaet Hannover
    Inventors: Alexander Nikanorov, Holger Schuelbe, Bernard Nacke
  • Publication number: 20090118126
    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: Application
    Filed: August 7, 2008
    Publication date: May 7, 2009
    Inventors: THEODORE E. BURKE, Frank Li
  • Publication number: 20090004318
    Abstract: A system for supplying processed material includes a barrel for transporting the processed material, having a chamber and an electrically conductive wall enclosing the chamber. The barrel has a length and an outer surface. Thermal insulation extends along at least a portion of the length and around the outer surface and provides an exterior surface whose contour is uniform and formed without grooves. A coil comprising an electric conductor is encased in an electrical insulating sheath. The coil contacts and encircles the exterior surface in loops forming an induction winding that extends along at least a portion of the length and around the exterior surface in a spiral path. An induction power supply is used for supplying alternating current to the coil at a relatively high frequency.
    Type: Application
    Filed: June 9, 2008
    Publication date: January 1, 2009
    Inventors: Bruce F. Taylor, Robert Kadykowski
  • Publication number: 20080149598
    Abstract: A substrate processing apparatus that can accurately control the temperature of a focus ring without causing abnormal electric discharge and the back-flow of radio frequency electrical power during the application of radio frequency electrical power. A wafer is mounted on a mounting stage disposed in a housing chamber. An annular focus ring is mounted on the mounting stage in such a manner as to surround the peripheral portion of the mounted wafer. The pressure in the housing chamber is reduced, radio frequency electrical power is applied to the mounting stage, and the focus ring generates heat by itself.
    Type: Application
    Filed: December 5, 2007
    Publication date: June 26, 2008
    Applicant: TOKYO ELECTRON LIMITED
    Inventors: Daisuke HAYASHI, Kazuya Nagaseki
  • Patent number: 7388178
    Abstract: An induction heating system for the manufacturing of optical memory microstructure, wherein the thermal cycle allows the process web to be rapidly heated to the relaxation and re-flow temperature, followed by cooling to the optimum separation temperature in under 10 seconds total process time. The rapid response heating system of the present invention may be achieved through the use of one or rotating asymmetrical induction heating coils which are embedded in the platen(s) of the embossing device.
    Type: Grant
    Filed: May 1, 2006
    Date of Patent: June 17, 2008
    Assignee: Energy Conversion Devices, Inc.
    Inventor: Michael Hennessey
  • Patent number: 7077993
    Abstract: Differential hardening apparatus for softening a portion only of a metal workpiece such as a die block consisting of apparatus for presenting a workpiece to a heat source which impinges heat directly on the workpiece and control means for causing the heat to be directed only long enough to soften only the portion which receives the heat so as to create a softened portion, such as the shank portion of a die block, and an unaffected hardened portion, such as the body portion of the die block.
    Type: Grant
    Filed: January 28, 2004
    Date of Patent: July 18, 2006
    Assignee: A. Finkl & Sons Co.
    Inventors: Charles W. Finkl, Algirdas A. Underys
  • Patent number: 7049563
    Abstract: An electric conductor provided for decreasing a lifting force exerted on an object being heated has an aperture of a small diameter in the center thereof, which leaves a large surface area to enhance reduction of the lifting force. The electric conductor is also provided with a comb section around the aperture for preventing a circling current induced in the electric conductor from flowing into an area around the aperture. This structure can thus alleviate excessive heating around the aperture, and allow the heating coil to produce a high output power for a long duration of time even when an inwardly concaved pan is used.
    Type: Grant
    Filed: May 24, 2004
    Date of Patent: May 23, 2006
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Toshihiro Keishima, Akira Kataoka, Izuo Hirota
  • Patent number: 7026587
    Abstract: A composite cooking apparatus having a body, a heating unit, and an induction heating unit. The heating unit is positioned in the body to generate heat used to heat food. The induction heating unit is positioned adjacent to the heating unit to generate a magnetic field to cook the food by induction heating. The induction heating unit has at least one wire, a coating of which is exposed to an electron beam to strengthen a heat resistance thereof.
    Type: Grant
    Filed: June 29, 2004
    Date of Patent: April 11, 2006
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Ha Yeong Yang, Jun Young Lee, Dong Lyoul Shin, Jung Eui Hoh, Jong Gun Kim, Alexandr Narbut
  • Patent number: 6884975
    Abstract: A system and method inductively heats and stress relieves a weld joint area having a stress induced zone. A susceptor assembly is positioned over the stress induced zone. The susceptor assembly includes susceptor sheets manufactured to operate at different, preselected Curie temperatures. A housing is mounted over the susceptor assembly including an induction coil positioned adjacent to the susceptor assembly. An alternating electric current is applied to the induction coil. The alternating electric current causes the induction coil to generate a plurality of magnetic flux lines. The invention provides the advantage that the magnetic flux lines passing through the susceptor assembly heat the susceptor assembly providing localized and controlled temperature heat to the weld joint area to stress relieve the stress induced zone.
    Type: Grant
    Filed: November 12, 2002
    Date of Patent: April 26, 2005
    Assignee: The Boeing Company
    Inventors: Marc R. Matsen, Terry L. Smith
  • Patent number: 6884976
    Abstract: An apparatus and a method for forming a localized joint in at least one structural member are provided. The apparatus includes a tool that corresponds to a joint portion of the structural member. An induction coil is disposed in the tool, and a power source is configured to energize the induction coil. A susceptor disposed between the tool and the structural member has a Curie temperature at which the susceptor becomes paramagnetic such that an electromagnetic field induced in the susceptor by the induction coil heats the susceptor to the Curie temperature for forming the joint.
    Type: Grant
    Filed: November 27, 2002
    Date of Patent: April 26, 2005
    Assignee: The Boeing Company
    Inventors: Marc R. Matsen, Terry L. Smith
  • Patent number: 6844533
    Abstract: An induction heating apparatus seals a container, such as a bottle, with a non-tampering seal. The induction heating apparatus has a concentrator and a coil assembly. The coil assembly includes multiple coil devices. Each coil device includes a bobbin with a central tube and an insulated electrical conductor. The insulated electrical conductor is wound around the central tube of the bobbin and is electrically connected to an alternating current power source. The bobbin is mounted in the concentrator. When alternating current is applied to the insulated electrical conductor, an electromagnetic field is created that will induce in an aluminum foil in the non-tampering seal. The aluminum foil will be heated and the heat in the aluminum foil will be transferred to a layer of heat active polymer in the non-tampering seal, which will quickly bond the non-tampering seal to the bottle.
    Type: Grant
    Filed: August 29, 2003
    Date of Patent: January 18, 2005
    Assignee: KSP Technologies Corp.
    Inventor: Yun-Ching Chuang
  • Publication number: 20040232139
    Abstract: The invention is of a portable stripping head induction heating system and associated method of use thereof which system and method is useful in heating metallic components to which protective coatings or linings are applied for enabling their easy removal.
    Type: Application
    Filed: February 24, 2004
    Publication date: November 25, 2004
    Inventor: Raymond Bass
  • Patent number: 6770858
    Abstract: For optimum induction heating of metallic strips (1) of differing widths—particularly in the edge region—one multicoil transverse field inductor is positioned both above and below the strip (1) to be heated, whose coil axes are positioned vertically to the strip surface. In this case, each inductor comprises at least one inductor segment (2, 3; 7; 15; 17), which is constructed as a coil composite of multiple approximately rectangular coils (8, 9, 10; 16; 18) which extend predominantly transversely to the transport direction of the strip (1), the coils (8, 9, 10; 16; 18) having different, stepped transverse extensions and the coil having the highest transverse extension extending at most up to the lateral edges of the widest strip and the coil having the lowest transverse extension extending at most up to the lateral edges of the narrowest strip.
    Type: Grant
    Filed: March 18, 2003
    Date of Patent: August 3, 2004
    Assignee: Otto Junker GmbH
    Inventor: Dieter Schluckebier
  • Publication number: 20040144773
    Abstract: Disclosed is an electric oven which increases temperature fast and reduces heat loss in accordance with that a cavity surface generates its own heat by using an induction heating. The electric oven comprises: a case having a door at a front side and having a cavity for receiving food therein; a magnetron installed at one side of an upper portion of the cavity for generating microwave of high frequency and supplying heat to the cavity; an inverter for generating high frequency at a space between the case and the cavity; first, second, third, and fourth heating units installed each side of the cavity for supplying heat. Since temperature of a cooking chamber can be set as wanted uniformly and faster, preheating time and actual cooking time can be reduced. Also, since inner temperature of the cavity rises faster and simultaneously, an automatic cleaning in the cavity using pyrolysis can be performed faster and uniformly, thereby reducing power consumption.
    Type: Application
    Filed: May 6, 2003
    Publication date: July 29, 2004
    Applicant: LG Electronics Inc
    Inventors: Wan-Soo Kim, Yang-Kyeong Kim, Young-Min Lee
  • Patent number: 6765181
    Abstract: An apparatus and process are provided for induction heat treatment of electrically conductive workpieces. The inductor assembly is formed from a single piece inductor that utilizes an electrically non-conductive top, side and bottom frames to hold flux concentrators in place over the sides of the inductor. Flux concentrators can be changed by unfastening the frame members, removing the existing flux concentrators, inserting new flux concentrators, and fastening the frame members. One or more of the frame members may serve as a receiving chamber for supply of a quench medium to an induction heated workpiece positioned in an opening in the inductor.
    Type: Grant
    Filed: September 16, 2003
    Date of Patent: July 20, 2004
    Assignee: Inductoheat, Inc.
    Inventors: Madhu S. Chatterjee, Byron L. Taylor, Micah Robert Black
  • Patent number: 6764818
    Abstract: A holding plate for selectively heating and cooling samples in a solution has two opposing surfaces, and a plurality of cylindrically-shaped through-hole wells for holding the samples. Each well extends between the two surfaces of the holding plate, and has an aspect ratio of greater than 5:1, and a diameter less than approximately 500 microns. A metallic coating is applied by vapor deposition techniques on a surface of the holding plate. Importantly, this coating extends into each well through a distance of approximately one and a half well diameters for contact with the solution and the samples. A heat transfer device is thermally connected to the metallic coating for selectively heating and cooling the samples in the wells of the holding plate.
    Type: Grant
    Filed: February 25, 2002
    Date of Patent: July 20, 2004
    Assignee: Diversa Corporation
    Inventor: William Michael Lafferty
  • Publication number: 20040099660
    Abstract: An apparatus and a method for forming a localized joint in at least one structural member are provided. The apparatus includes a tool that corresponds to a joint portion of the structural member. An induction coil is disposed in the tool, and a power source is configured to energize the induction coil. A susceptor disposed between the tool and the structural member has a Curie temperature at which the susceptor becomes paramagnetic such that an electromagnetic field induced in the susceptor by the induction coil heats the susceptor to the Curie temperature for forming the joint.
    Type: Application
    Filed: November 27, 2002
    Publication date: May 27, 2004
    Applicant: The Boeing Company
    Inventors: Marc R. Matsen, Terry L. Smith
  • Patent number: 6633023
    Abstract: An induction heating device for heating cooking vessels includes at least three concentric inductors and implements a step of heating a load. For a load covering at least three inductors, at least one intermediate inductor that is covered and that is determined in such a manner as to homogenize the input of heat to the load is not energized during the heating step. Applications of the device include domestic hot plates.
    Type: Grant
    Filed: March 21, 2001
    Date of Patent: October 14, 2003
    Assignee: Brandt Cooking
    Inventors: René Cornec, Didier Gouardo, Alain Roux
  • Publication number: 20030155348
    Abstract: The invention relates to an antenna radiation heating (2) to heat a matter by means of resonance with several surface antenna elements (3), each consisting of a carrier surface material (11) and a radiation coating (10) applied thereon which is delimited by two spaced electrical conductors (14, 15) in parallel, with electrical contact as antenna limiter and with which high-frequency electromagnetic radiation can be emitted. Furthermore, this antenna radiation heating (2) comprises a harmonic generator which is coupled to the two electrical conductors (14, 15) of a surface antenna element (3) for an excitation of the radiation coating (10) for emitting an oscillation spectrum within the range of molecular natural frequencies of the matter to be heated. In accordance with the invention, the radiation coating (10) is unilaterally applied to the carrier surface material (11) and forms an element front facing a matter to be heated.
    Type: Application
    Filed: January 22, 2003
    Publication date: August 21, 2003
    Inventor: Helmut Reichelt
  • Patent number: 6555801
    Abstract: The invention provides an improved induction heating coil, an induction heating device including the induction heating coil and a method for heating a workpiece with the induction heating device. The induction heating coil for heating a workpiece includes an elongated solenoid-type induction heating coil and at least one pancake-type coil positioned within a portion of the elongated solenoid-type induction heating coil, where the solenoid-type coil and the pancake-type coil are in electrical connection with each other.
    Type: Grant
    Filed: January 23, 2002
    Date of Patent: April 29, 2003
    Assignee: Melrose, Inc.
    Inventors: Aaron P. LeMieux, Harris E. Hanser, Robert E. Hosterman
  • Patent number: 6498325
    Abstract: A modular induction heated cooking hob inductor and hob are disclosed. The inductor is a wound conductor having turns at substantially right angles to previous turns. Parallel turns of the conductor are separated by a layer of insulation adjacent to the turns of the conductor. The hob may comprise multiple inductors. The inductor may have sensors for detecting a device to be heated and/or illuminatable segments that light up in response to the presence of an object to be heated.
    Type: Grant
    Filed: April 7, 2000
    Date of Patent: December 24, 2002
    Assignee: Jaeger Regulation
    Inventors: Dominique Akel, Henri Schlumberger
  • Patent number: 6483088
    Abstract: By freely adjusting the heat generation distribution of an object to be heated, the heat generation distribution which matches a purpose can be easily obtained. In an electromagnetic induction heating device including an object to be heated having at least an electromagnetic induction heat generating layer and a magnetic field generating unit which is arranged toward the electromagnetic induction heat generating layer of the object to be heated in an opposed manner and includes an exciting coil which generates a magnetic flux penetrating the electromagnetic induction generating layer, a magnetic flux adjusting member which is made to be interlinked with a portion of the magnetic flux of the exciting coil to generate an electromagnetic induction action so that the magnetic flux acting on the electromagnetic induction heat generating layer is changed is disposed in the vicinity of the exciting coil.
    Type: Grant
    Filed: September 26, 2001
    Date of Patent: November 19, 2002
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Yasuhiro Uehara, Motofumi Baba
  • Patent number: 6369370
    Abstract: A kitchen cooktop surface in a material of nature, such as marble may be fitted with induction heating elements providing higher efficiency than mere placing in contact with the lower side of the cooktop. According to the invention the cooktop is hollowed out from the lower side, leaving only a thin partition which is reinforced by means of casting in situ of a ferromagnetic particle loaded material. Alternatively, the top surface may be penetrated, and a central circular piece of the cooktop material may be retained by means of similar casting in situ.
    Type: Grant
    Filed: October 14, 1999
    Date of Patent: April 9, 2002
    Assignee: Aktiebolaget Electrolux
    Inventor: Christian Eskildsen
  • Patent number: 6365883
    Abstract: An induction heating coil for joining structural members by heating a bonding material disposed between the structural members includes first and second elements with complementary shapes spaced equidistantly apart along the length of opposing surfaces of the structural members. Bases and risers connected to the first element to a source of high frequency electrical current. Conductive elements connect the first and second elements into a single turn coil. The first and second elements, and at least the riser, are formed of hollow, tubular members to form a coolant flow path therethrough.
    Type: Grant
    Filed: September 2, 1999
    Date of Patent: April 2, 2002
    Assignee: Robotron Corporation
    Inventor: Gregory L. Pohl
  • Patent number: 6362462
    Abstract: An first induction hardening coil assembly according to one embodiment of the present invention comprises a coil having a top surface, an underside surface, and an inner coil curvature disposed between the top surface and the underside surface. The inner coil curvature extends approximately 180 degrees around a coil axis. The coil further includes a first end section adjacent a first end of the inner coil curvature which extends between the top surface and the underside surface. A second end section adjacent a second end of the inner coil curvature extends between the top surface and the underside surface. A support arm is connected to the coil and is constructed and arranged for providing an electrical connection between the coil and a source of electrical current. The support arm includes a current-in portion connected to the underside surface adjacent the first end section and a current-out portion connected to the top surface at a location which is between the first and second end sections.
    Type: Grant
    Filed: October 30, 2000
    Date of Patent: March 26, 2002
    Assignee: Contour Hardening, Inc.
    Inventors: Neil A. Merrell, John M. Storm
  • Publication number: 20010025848
    Abstract: An induction heating device for heating cooking vessels includes at least three concentric inductors and implements a step of heating a load. For a load covering at least three inductors, at least one intermediate inductor that is covered and that is determined in such a manner as to homogenize the input of heat to the load is not energized during the heating step. Applications of the device include domestic hot plates.
    Type: Application
    Filed: March 21, 2001
    Publication date: October 4, 2001
    Applicant: Brandt Cooking
    Inventors: Rene Cornec, Didier Gouardo, Alain Roux
  • Patent number: 6288374
    Abstract: Cooking ranges using heating by eddy currents caused by induction of high frequency energy are known, but they have losses caused by leakage fields. The invention provides heating unit in which the magnet coils are integrated into magnetic circuit where the field is collected due to the disposition of the core. A preferred embodiment utilizes magnetic concrete for core parts with chambers for the coils. There may advantageously be cast a covering layer which is thin and wear resistant but still strong, because it is everywhere supported by the material.
    Type: Grant
    Filed: July 13, 1995
    Date of Patent: September 11, 2001
    Assignee: A/S Ernst Voss Fabrik
    Inventors: Christian Eskildsen, Keld Christensen, Bent Alvsten
  • Patent number: 6288375
    Abstract: An induction heating apparatus and method for heating a substantially continuous first bondline defined by a length of thermally responsive bonding material positioned between a first member and a second member. The first member or second member is made of an electrically conductive material or positioned adjacent an electrically conductive material. The inductive heating apparatus includes a flexible, reshapeable cable assembly operably positionable adjacent the first member along the first bondline. The flexible, reshapeable cable assembly is capable of being manually shaped to a first shape of the first bondline, and is capable of being manually re-shaped to a second shape of a second bondline different than the first shape of the first bondline. An alternating current power supply is electrically coupled to the flexible, reshapeable cable assembly.
    Type: Grant
    Filed: October 21, 1999
    Date of Patent: September 11, 2001
    Assignee: 3M Innovative Properties Company
    Inventors: Larry R. Lappi, Robert J. Boettcher, David G. Miller, Richard F. Miller
  • Patent number: 6153865
    Abstract: An induction hardening apparatus for inductively heating and quench hardening a crankshaft includes an arrangement of two workstations similarly configured and a robotic device indexing the crankshaft from a first workstation to a second workstation. The induction hardening apparatus is designed with a single induction coil located at the first workstation for the sequential induction heating and quench hardening of the pins of the crankshaft. At the second workstation, a single induction coil is used for the bearing surfaces of the crankshaft. One feature of the present invention is that the induction coils do not contact the surfaces of the crankshaft which are being inductively heated and quench hardened. Crankshaft dimensions and geometry are prograrmned into servodrive systems which move the corresponding coil in X and Y directions accurately tracing the orbit or path of each pin and each bearing surface.
    Type: Grant
    Filed: November 1, 1999
    Date of Patent: November 28, 2000
    Assignee: Contour Hardening, Inc.
    Inventors: John M. Storm, Max E. Stewart, Spencer L. Gibbs
  • Patent number: 6150644
    Abstract: Method and device for time-optimized curing of winding coils and/or rods of electrical machines having winding coils and/or rods with groove and coil face areas and have at least one individual conductor provided with a curable material. The coated conductor insulation or a conductor assembly is inductively heated prior to, and/or during the inductive heating process and/or thereafter, the winding coils and/or rods are pressed and the winding coils and/or rods are cooled. With this method and device, time-optimized manufacture of winding coils and/or rods can be manufactured with reproducible quality results.
    Type: Grant
    Filed: September 25, 1998
    Date of Patent: November 21, 2000
    Assignee: Siemens AG
    Inventor: Rudolf Senger
  • Patent number: 6147336
    Abstract: A cooking apparatus includes a fan 13 provided at the top wall of a heating chamber 2 with its front face directed downwards. A spiral coil 14 in the form of a flat disc is provided around a rotation shaft 12 above the heating chamber 2. When high-frequency current is supplied to the coil 14, the coil 14 generates an alternating magnetic flux. The magnetic flux penetrates a shielding plate 16 and the fan 13, whereby the fan 13 is inductively heated. The fan 13 draws air from the heating chamber 2 and propels the air back to the heating chamber 2, where the air is heated when it contacts the fan 13. As a result, the temperature in the heating chamber rises, so that an object placed on a turntable 5 is cooked. By such a constitution, it is not necessary to keep additional space open for a heating element because the fan 13 functions as a heating element. Accordingly, it is possible to enlarge the diameter of the fan 13 so that the blowing efficiency is enhanced.
    Type: Grant
    Filed: February 22, 1999
    Date of Patent: November 14, 2000
    Assignee: Japanese Research and Development Association for Application of Electronic Technology in Food Industry
    Inventors: Kazufumi Ushijima, Takeshi Fujita, Toshiyuki Hirata
  • Patent number: 6144019
    Abstract: An inductor module for disposition below a cooking area plate of an inductor cooking area is disclosed. The inductor module includes a plate-shaped substrate and at least two inductor coils including a first inductor coil and a second inductor coil formed as flat conductor tracks mounted on opposed sides of the plate-shaped substrate. The inductor coils are further disposed spaced apart from and one above the other.
    Type: Grant
    Filed: September 15, 1999
    Date of Patent: November 7, 2000
    Assignee: BSH Bosch und Siemens Hausgeraete GmbH
    Inventors: Jose-Ramon Garcia, Markus Theine, Pablo Hernandez
  • Patent number: 5999774
    Abstract: A serial electrophotographic apparatus has a carriage which is translated in a direction perpendicular to a direction in which recording paper is transported, a processing part effects electrophotographic printing, and a fixing unit effects fixing, wherein a fixing roller is heated by an induction coil according to an induction heating process, and a current supplied to the induction coil is cut off by a temperature fuse being blown when the temperature of the induction coil rises above a predetermined level. The induction coil has a configuration including multiple flat winding layers serially connected together and wherein ends of the induction coil are led out from the center of the windings so that temperature rise is restrained.
    Type: Grant
    Filed: July 10, 1997
    Date of Patent: December 7, 1999
    Assignee: Fujitsu Limited
    Inventors: Syuzo Masuda, Ryouichi Iwama
  • Patent number: 5902508
    Abstract: An induction heating coil used in a floating zone melting method, characterized in that the path of a high-frequency current is controllable in the body surface of the coil and by the use of the coil a more uniform resistivity profile across a diameter is achieved as compared with those from the prior art. In the coil a second metal or alloy different in electric conductivity from a first metal or alloy of the coil is disposed in a predetermined place(s) to control the path of a high-frequency current, wherein the second metal or alloy has, for example, higher electric conductivity than the first metal or alloy and a long narrow and thin strip made of the second metal or alloy is disposed in such a manner that it meanders on the body surface of the coil between the outer and inner peripheries periodically.
    Type: Grant
    Filed: March 12, 1997
    Date of Patent: May 11, 1999
    Assignee: Shin-Etsu Handotai Co., Ltd.
    Inventors: Masanori Kimura, Naosato Yoshida
  • Patent number: 5895599
    Abstract: A device for induction heating a continuously moving metal product in a protective atmosphere includes an induction system. A non-metallic and gas-tight enclosure is disposed around the moving product, between the product and the induction system. Uses include an installation for continuous heat treatment of a moving product, such as a steel strip or wire, in a protective atmosphere, between a fast cooling chamber and an intermediate temperature maintaining chamber.
    Type: Grant
    Filed: August 1, 1997
    Date of Patent: April 20, 1999
    Assignee: Selas S.A.
    Inventor: Claude Andre Nivoche
  • Patent number: 5889263
    Abstract: 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: Grant
    Filed: March 19, 1997
    Date of Patent: March 30, 1999
    Assignee: Tetra Laval Holdings & Finance S.A.
    Inventor: Mikael Andersson