Field Intensity/reflection Patents (Class 219/709)
  • Patent number: 10785984
    Abstract: A method of processing an object is disclosed. The method comprises heating the object by applying radio frequency (RF) energy, monitoring a value related to a rate of absorption of RF energy by the object during the heating, and adjusting the RF energy in accordance with changes in a time derivative of the monitored value.
    Type: Grant
    Filed: December 8, 2015
    Date of Patent: September 29, 2020
    Assignee: Goji Limited
    Inventors: Eyal Torres, Daniel Selinger
  • Patent number: 10772165
    Abstract: An electromagnetic cooking device and cooking method to perform zone cooking is disclosed. The method includes scanning a resonant cavity in which a food load has been placed with RF feeds that are coupled to respective high power amplifiers; identifying resonant frequencies and corresponding phases of the RF feeds; storing a resonance map; classifying symmetries in the resonant map; determining paths defining stirring routes between poles of different symmetries; determining midpoints in the paths with a maximum unbalance between reflected powers of the respective high power amplifiers; classifying the unbalance in terms of power steered to the left and right sides of the food load; synthesizing a heating strategy for zone cooking using the classified unbalance; and implementing the heating strategy by causing the plurality of high power amplifiers and RF feeds to introduce electromagnetic radiation at specific selected frequencies and phases into the cavity based on the heating strategy.
    Type: Grant
    Filed: March 2, 2018
    Date of Patent: September 8, 2020
    Assignee: Whirlpool Corporation
    Inventors: Davide Guatta, Mattia Rigo
  • Patent number: 10772166
    Abstract: A microwave heating device includes at least two radiating portions that are adapted to radiate microwaves to the heating chamber and can be operated according to a plurality of operational configurations that differ in frequency and/or in phase shift(s) between the radiated microwaves. Data of energy efficiency, as a function of operational configurations, can be obtained for a product in the heating chamber. For example, energy efficiency data are obtained through a learning procedure. The obtained data can be processed to select one or more operational configurations ranking high in energy efficiency and a heating procedure for the product inside the heating chamber can be executed by operating the at least two radiating portions according to the selected one or more operational configurations.
    Type: Grant
    Filed: February 28, 2017
    Date of Patent: September 8, 2020
    Assignee: ILLINOIS TOOL WORKS, INC.
    Inventors: Nicola Lanza, Chiara DeMassari, Francesco Gambato, Michele Sclocchi, Andrea Baccara, Benoît Flipot
  • Patent number: 10591218
    Abstract: An oven can include an oven body having a peripheral wall at least partially defining a cooking cavity with a top wall comprising spaced interior panels and exterior panels defining a channel therebetween. Furthermore, the oven can include insulation located in the channel and an imaging device with a field of view including at least a portion of the cooking cavity.
    Type: Grant
    Filed: October 27, 2017
    Date of Patent: March 17, 2020
    Assignee: Whirlpool Corporation
    Inventors: Joshua G. Abdoo, Ariana M. Bruno, Neomar Giacomini
  • Patent number: 10529535
    Abstract: Apparatuses, methods, kits, and systems relating to transferring electromagnetic energy to an energy application zone via a source of electromagnetic energy are disclosed. Some apparatuses may include a processor configured to determine a preliminary amount of energy to be dissipated in an object located at least partially in the energy application zone and determine a corrected amount of energy based on the preliminary amount of energy and calibration information. The processor may be further configured to estimate an amount of energy dissipated in the object. The processor may also be configured to cause the source to transfer energy to the energy application zone at least until the energy dissipated in the object as estimated equals the corrected amount of energy.
    Type: Grant
    Filed: April 25, 2014
    Date of Patent: January 7, 2020
    Assignee: GOJI LIMITED
    Inventors: Daniella Atzmony, Eran Ben-Shmuel, Steven Robert Rogers, Amichai Ron, Daniel Selinger, Eyal Torres
  • Patent number: 10524316
    Abstract: A low-frequency heating apparatus is provided. The low-frequency heating apparatus includes a signal generator configured to generate an operation frequency for inducing a current through a coil unit surrounding an internal area of a housing of the heating apparatus, a power amplifier configured to amplify power of the operation frequency to a predetermined level and transmit the amplified operation frequency to the coil unit, the coil unit configured to be energized to heat an object provided inside the housing through a magnetic field generated by the current, and at least one processor configured to monitor an impedance value of the coil unit resonating at the operation frequency and control a resonant operation of the coil unit based on the impedance value of the coil unit and an impedance value of the power amplifier.
    Type: Grant
    Filed: October 21, 2016
    Date of Patent: December 31, 2019
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Dohyuk Ha, Jungyub Lee, Jun Sig Kum, YoungJu Lee, Goudelev Alexander
  • Patent number: 10470255
    Abstract: A method of processing an object in an energy application zone by application of radio frequency (RF) energy via a plurality of radiating elements may include applying RF energy to the energy application zone at a first plurality of excitation setups (excitation setups). The method may also include applying RF energy to the energy application zone at one or more excitation setups, at least one of which is not included in the first plurality of excitation setups, based on feedback received from the energy application zone in response to the application of the first amount of energy to the energy application zone at the first plurality of excitation setups.
    Type: Grant
    Filed: July 1, 2013
    Date of Patent: November 5, 2019
    Assignee: GOJI LIMITED
    Inventors: Zalman Ibragimov, Leonid Gluhovsky
  • Patent number: 10085469
    Abstract: The present invention relates to a method and apparatus for controlling a cooking process of food. The method comprises a step of emitting (101) a plurality of radio frequency signals into the food non invasively. The method also comprises a step of receiving (105) a plurality of reflection signals or transmission signals of the radio frequency signals from the food, wherein the reflection signals is a part of the radio frequency signals that reflect from the food, and the transmission signals is a part of the radio frequency signals that transmit through the food. The method also comprises a step of obtaining (110) a protein status, wherein the protein status is the extent of protein denaturation, in the food in the course of heating the food based on the plurality of radio frequency signals and the plurality of reflection signals or transmission signals.
    Type: Grant
    Filed: March 11, 2015
    Date of Patent: October 2, 2018
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: Wei Li, Bin Yin
  • Patent number: 10042083
    Abstract: A thermal sensing device can include an electromagnetic radiation source configured to generate electromagnetic radiation, a first antenna configured to direct electromagnetic radiation generated by the radiation source toward a target, and a second antenna configured to receive microwave radiation emitted from an internal portion of the target. The thermal sensing device can also include a microwave sensor coupled to the second antenna and configured to acquire sensor data regarding the microwave radiation emitted from an internal portion of the target. A processing device, included in the thermal sensing device, can be configured to produce thermal data based on the sensor data.
    Type: Grant
    Filed: July 16, 2014
    Date of Patent: August 7, 2018
    Assignee: Elwha LLC
    Inventors: Jeffrey A. Bowers, Tom Driscoll, Roderick A. Hyde, Jordin T. Kare, David R. Smith, Clarence T. Tegreene, Lowell L. Wood, Jr.
  • Patent number: 9992824
    Abstract: An apparatus configured to apply electromagnetic energy to an object may include an energy application zone adapted to receive at least a portion of an object and a source configured to supply RF energy to the energy application zone. The apparatus may also include at least one processor configured to: cause the source to supply RF energy to the energy application zone; determine a value indicative of a rate of energy absorption by a load, including at least a portion of the object, during a first period of time; and determine, based on the value indicative of the rate of energy absorption by the load, an estimated amount of time to obtain a desired characteristic in at least a portion of the object.
    Type: Grant
    Filed: October 27, 2011
    Date of Patent: June 5, 2018
    Assignee: GOJI LIMITED
    Inventors: Steven Robert Rogers, Daniella Atzmony
  • Patent number: 9833286
    Abstract: Disclosed is a microwave antenna assembly that includes proximal and distal radiating sections and a junction member. The proximal radiating section includes inner and outer conductors and DC power and neutral conductors. The inner conductor is disposed within the outer conductor and the DC power and neutral conductors are disposed radially outward therefrom. The junction member mates the distal and proximal radiating sections such that the distal and proximal radiating sections are positioned relative to one another. The junction member further includes a microwave signal amplifier (MSA) that receives a signal at a first energy level from the inner and outer conductors and a DC power signal from the DC power and neutral conductors. The MSA amplifies the signal from the first energy level to an additional, greater energy level. The junction member provides the microwave signal at the additional energy level to the proximal and distal radiating sections.
    Type: Grant
    Filed: May 28, 2013
    Date of Patent: December 5, 2017
    Assignee: Covidien LP
    Inventor: Ronald J. Podhajsky
  • Patent number: 9609692
    Abstract: Apparatuses and methods for applying EM energy to a load. The apparatuses and methods may include at least one processor configured to receive information indicative of energy dissipated by the load for each of a plurality of modulation space elements. The processor may also be configured to associate each of the plurality of modulation space elements with a corresponding time duration of power application, based on the received information. The processor may be further configured to regulate energy applied to the load such that for each of the plurality of modulation space elements, power is applied to the load at the corresponding time duration of power application.
    Type: Grant
    Filed: October 5, 2012
    Date of Patent: March 28, 2017
    Assignee: GOJI LIMITED
    Inventors: Alexander Bilchinsky, Eran Ben-Shmuel, Pinchas Einziger, Amit Rappel
  • Patent number: 9540759
    Abstract: A method and apparatus for drying textile material with a radio frequency (RF) applicator and a controller, the method includes energizing the RF applicator to generate a field of electromagnetic radiation (e-field), measuring a parameter related to the energization of the RF applicator, determining a drying cycle of operation in the controller based on the measured parameter, and controlling the energization of the RF applicator according to the determination of the drying cycle of operation, wherein the textile material is dried.
    Type: Grant
    Filed: June 9, 2016
    Date of Patent: January 10, 2017
    Assignee: Whirlpool Corporation
    Inventors: Mark L. Herman, Daniel M. Putnam
  • Patent number: 9297770
    Abstract: A calorie estimating device for measuring a calorie content of a food item is provided. The device comprises a holder substrate, a transmitter antenna configured to transmit ultra-wide band (UWB) signals to at least a portion of the food item disposed on a side of the holder substrate, wherein the transmitter antenna comprises a planar antenna, a first receiver antenna configured to receive at least a portion of UWB signals reflected by the food item, wherein the first receiver antenna comprises a planar antenna, and a second receiver antenna configured to receive at least a portion of UWB signals propagated through the food item, wherein the second receiver antenna comprises a planar antenna.
    Type: Grant
    Filed: July 29, 2011
    Date of Patent: March 29, 2016
    Assignee: General Electric Company
    Inventors: Nilesh Tralshawala, John Frederick Graf, Jack Mathew Webster, Vasile Bogdan Neculaes, Sarah Lillian Katz
  • Patent number: 9265097
    Abstract: A method of processing an object is disclosed. The method comprises heating the object by applying radio frequency (RF) energy, monitoring a value related to a rate of absorption of RF energy by the object during the heating, and adjusting the RF energy in accordance with changes in a time derivative of the monitored value.
    Type: Grant
    Filed: June 30, 2011
    Date of Patent: February 16, 2016
    Assignee: GOJI LIMITED
    Inventors: Eyal Torres, Daniel Selinger
  • Patent number: 9182126
    Abstract: An oven includes a cooking chamber configured to receive a food product, a user interface configured to display information associated with processes employed for cooking, first and second energy sources, and a cooking controller. The first energy source provides primary heating and the second energy source provides secondary heating for the food product. The cooking controller executes instructions directing application of energy to the food product via the first or second energy sources. The cooking controller may include processing circuitry configured to receive an indication of cooking parameters defining at least a food product category of the food product and select a cooking signature corresponding to the food product category. The cooking signature may include information descriptive of inherent properties of the food product category and input response properties defining one or more sets of instructions associated with a cooking sequence for the food product based on the cooking parameters.
    Type: Grant
    Filed: October 17, 2011
    Date of Patent: November 10, 2015
    Assignee: ILLINOIS TOOL WORKS INC.
    Inventors: Richard W. Cartwright, Richard A. Kice
  • Publication number: 20150144621
    Abstract: A matching method and a microwave heating method in a microwave heating apparatus for heating a substrate by introducing a microwave into a processing chamber comprises an initial matching step of performing a matching so that a reflection power to a microwave introducing unit is minimized in a state where the substrate is maintained at a first height position by a supporting member. And a second height position determination step of introducing the microwave into the processing chamber by the microwave introducing unit and determining a second height position of the substrate based on at least a temperature of the substrate while adjusting a height of the substrate by the supporting member.
    Type: Application
    Filed: November 20, 2014
    Publication date: May 28, 2015
    Inventors: Seokhyoung HONG, Mitsutoshi ASHIDA, Yoshihiro MIYAGAWA, Masaki KOIZUMI
  • Publication number: 20150136760
    Abstract: A microwave oven may include a housing defining an oven cavity therein configured to receive material to be heated, and a plurality of solid state microwave generating cells carried by the housing. At least one feedback circuit may be carried by the housing and configured to detect EM radiation within the oven cavity not absorbed by the material to be heated. A processor may be carried by the housing and coupled to the plurality of microwave beamforming cells and to the at least one feedback circuit. The processor may be configured to receive feedback from the at least one feedback circuit based upon the EM radiation not absorbed by the material to be heated, and control phase shifters of the beamforming cells to change the patterns of EM energy transmitted by antennas of the beamforming cells based upon the feedback received from the at least one feedback circuit.
    Type: Application
    Filed: November 12, 2014
    Publication date: May 21, 2015
    Inventors: Jose Augusto LIMA, AMERICO PAULICCHI FILHO
  • Publication number: 20150053671
    Abstract: According to a microwave frequency setting device, an additional signal source outputs an additional signal. An adder adds the additional signal to a microwave to output the microwave thus-obtained. A reflected signal measurement section measures a power of a reflected signal that is produced by reflection of an output from the adder having entered a microwave furnace, the microwave furnace being adapted to accommodate therein an object to be processed with the microwave. A local minimum frequency measurement section measures a local minimum frequency, the local minimum frequency being a frequency at which a measurement result provided by the reflected signal measurement section has a local minimum. A frequency setting section sets a frequency of the microwave to the local minimum frequency measured by the local minimum frequency measurement section. A frequency band of the additional signal includes a resonance frequency of the microwave furnace.
    Type: Application
    Filed: July 29, 2014
    Publication date: February 26, 2015
    Inventor: Hiroyuki KURITA
  • Publication number: 20150041458
    Abstract: A microwave processing apparatus is provided with an oscillator, a power amplifier, a heating chamber that accommodates an object to be heated, a power feeder which is disposed on a wall surface of the heating chamber, which receives an output transmitted from a microwave generator and which radiatively feeds the microwave into the heating chamber, and a power detector that detects the power reflected from the power feeder to the power amplifier. The microwave processing apparatus determines a plurality of points of heating frequencies by using top several points of minimum point frequencies of the reflected power, and performs frequency hopping heating within a predetermined unit time.
    Type: Application
    Filed: September 14, 2012
    Publication date: February 12, 2015
    Applicant: PANASONIC CORPORATION
    Inventors: Keisuke Muto, Tomotaka Nobue
  • Patent number: 8941040
    Abstract: An electromagnetic heater for heating an irregularly shaped object, including: a cavity within which an object is to be placed; at least one feed which feeds UHF or microwave energy into the cavity; and a controller that controls one or more characteristics of the cavity or energy to assure that the UHF or microwave energy is deposited uniformly in the object within ±30% over at least 80% of the volume of the object.
    Type: Grant
    Filed: October 6, 2010
    Date of Patent: January 27, 2015
    Assignee: Goji Limited
    Inventors: Eran Ben-Shmuel, Alexander Bilchinsky
  • Patent number: 8927913
    Abstract: Generally and not exclusively, a method for controlling a process condition of at least one item within a microwave chamber may include receiving one or more initial values of one or more dynamically variable heatability properties for the at least one item in the microwave chamber, applying one or more microwave energy beams to the at least one item in the microwave chamber, remotely monitoring a spatial variation of the one or more dynamically variable heatability properties for the at least one item in the microwave chamber at least one of simultaneously with or following the applying of the one or more microwave energy beams, and estimating the process condition for microwaving the at least one item in the microwave chamber based at least partially on the monitoring of the one or more dynamically variable heatability properties for the at least one item in the microwave chamber.
    Type: Grant
    Filed: October 14, 2009
    Date of Patent: January 6, 2015
    Assignee: The Invention Science Fund I, LLC
    Inventors: Roderick A. Hyde, Muriel Y. Ishikawa, Edward K. Y. Jung, Nathan P. Myhrvold, Clarence T. Tegreene, Lowell L. Wood, Jr.
  • Publication number: 20140305934
    Abstract: A materials processing system comprises a thermal processing chamber and a broadband microwave power source. The power source includes an ovenized small-signal RF circuit, a high power microwave amplifier, and forward and reflected power detectors separated from one another by an isolator. The power detectors are also preferably ovenized. A control system provides control signals to the thermally stabilized VCO and VCA in the small-signal circuit to control output power based on detected forward power compared to demanded forward power. The system may be run in either open-loop or closed-loop modes.
    Type: Application
    Filed: April 16, 2013
    Publication date: October 16, 2014
    Inventors: Clayton R. DeCamillis, Joseph M. Wander, Richard C. Hazelhurst, Michael L. Hampton
  • Patent number: 8847130
    Abstract: A heating unit can reduce the rate of power consumption for heating a vehicle, so that the running distance of the vehicle is increased and hence the battery charging cycle of the vehicle is prolonged. A heating unit of a vehicle heating system includes a casing made of a metal material capable of electromagnetically shielding microwaves, a support arranged in the hollow section of the casing, a plurality of microwave absorbing/heat emitting members arranged at the support and a microwave outputting unit arranged in the casing to output microwaves toward respective microwave absorbing/heat emitting members, blown air being heated by heat generated as a result of absorption of microwaves by the microwave absorbing/heat emitting members at the time for blown air to flow from the upstream side to the downstream side in the hollow sections of the microwave absorbing/heat emitting members.
    Type: Grant
    Filed: May 9, 2011
    Date of Patent: September 30, 2014
    Assignees: Kabushiki-Kaisha TAKUMI, Kabushiki-Kaisha Lead Industry
    Inventors: Norio Niwa, Ryousei Noda, Hiroki Anzai
  • Publication number: 20140231418
    Abstract: An aspect of the present invention provides a microwave heating device for an object having a plurality of parts, the microwave heating device including: a plurality of antennas which emits microwaves to a heating chamber inside; a sensor which detects information from a block model assigned the information indicating a characteristic of each of the parts; a display and input operation unit configured to receive an input of heating conditions for the object; an electromagnetic field analysis unit configured to derive a heating profile by electromagnetic field analysis based on the information detected by the sensor and the heating conditions inputted to the display and input operation unit, the heating profile including microwave emitting conditions for the object; and a control unit configured to control performance of the microwaves emitted from the antennas based on the derived heating profile.
    Type: Application
    Filed: February 15, 2013
    Publication date: August 21, 2014
    Applicant: PANASONIC CORPORATION
    Inventors: Hikaru Ikeda, Motoyoshi Iwata, Tomohide Kamiyama
  • Publication number: 20140197761
    Abstract: The invention relates to a facility (1) for microwave treatment of a load, including: at least one application device (30); at least one solid-state generator (4) in the field of microwaves, connected to at least one application device by a means for guiding (5) the electromagnetic wave; at least one frequency adjustment system (40) designed for adjusting the frequency of the wave produced by the corresponding generator (4); a measurement system (31) for the or each application device (30), designed for measuring the power reflected PR(i) by the application device (30); an automated control means (6) connected to each frequency adjustment system (40) and to each measurement system (31) in order to control the adjustment of the frequency f(i) of the electromagnetic wave according to the reflected power, in order to adjust the reflected power PR(i) and/or to adjust the transmitted power PT(i).
    Type: Application
    Filed: April 25, 2012
    Publication date: July 17, 2014
    Applicant: SAIREM SOCIETE POUR L'APPLICATION INDUSTRIELLE DE LA RECHERCHE EN ELECTRONIQUE ET MICRO ONDES
    Inventors: Adrien Grandemenge, Jean-Marie Jacomino, Marilena Radoiu, Louis Latrasse
  • Publication number: 20140190960
    Abstract: The present invention related to devices and methods that use returned power (RP) measurements during microwave energy delivery to perform one or more functions. For example, microwave devices and systems that comprise one or more features to measure the returned microwave power. One or more measurements of the returned microwave power may be used to obtain information about one or more of: antenna shape, system status and system performance. One or more measurements of the returned microwave power shaping elements may also be used to obtain information about one or more properties of the target material. The invention also discloses devices and methods for delivering microwave energy to a variety of target materials to achieve a variety of desired microwave effects.
    Type: Application
    Filed: April 1, 2013
    Publication date: July 10, 2014
    Inventors: Chun Yiu CHU, Dinesh I. MODY, Ketan SHROFF, Amrish J. WALKE, Kirby CHIANG, Christopher Ah NEW, Christine M. TATE
  • Patent number: 8742306
    Abstract: Apparatuses, methods, kits, and systems relating to transferring electromagnetic energy to an energy application zone via a source of electromagnetic energy are disclosed. Some apparatuses may include a processor configured to determine a preliminary amount of energy to be dissipated in an object located at least partially in the energy application zone and determine a corrected amount of energy based on the preliminary amount of energy and calibration information. The processor may be further configured to estimate an amount of energy dissipated in the object. The processor may also be configured to cause the source to transfer energy to the energy application zone at least until the energy dissipated in the object as estimated equals the corrected amount of energy.
    Type: Grant
    Filed: January 4, 2011
    Date of Patent: June 3, 2014
    Assignee: Goji Ltd.
    Inventors: Daniella Atzmony, Eran Ben-Shmuel, Steven Robert Rogers, Amichai Ron, Daniel Selinger, Eyal Torres
  • Publication number: 20130334216
    Abstract: An apparatus and a method for heating a load using microwaves is disclosed. The apparatus includes a transmission line, configured to transmit microwaves from a microwave generator to a cavity. A sensing device configured to measure electromagnetic field strengths for providing information about the phase and the amplitude of a reflection coefficient that represents a ratio between the amount of microwaves reflected back towards the microwave generator and the amount of microwaves transmitted in the transmission line from the microwave generator. A control unit configured to detect whether the measured electromagnetic field strengths correspond to a reflection coefficient having a phase within a certain interval of phases and an amplitude within a certain interval of amplitudes. Additionally, certain intervals of phases and amplitudes correspond to an operating region of the microwave generator. The control unit controls feeding of microwaves to the cavity based on this detection.
    Type: Application
    Filed: June 18, 2013
    Publication date: December 19, 2013
    Inventors: HAKAN CARLSSON, NORDH ULF
  • Publication number: 20130334215
    Abstract: A microwave heating apparatus and a method of heating a load using microwaves is disclosed. The microwave heating apparatus includes a cavity configured to receive a load, a microwave source for generating microwaves and a plurality of transmission lines for guiding the generated microwaves to the cavity. The microwave heating apparatus may also include an electronic device adapted to adjust the impedances of each of the plurality of transmission lines individually, a measuring device adapted to obtain a signal representative of the impedance of each one of the plurality of transmission lines, and a control unit configured to control the electronic device based on the obtained signals. The microwave heating apparatus, as disclosed, provides a microwave heating apparatus configured to heat a load with improved energy efficiency and improved heating evenness.
    Type: Application
    Filed: June 18, 2013
    Publication date: December 19, 2013
    Inventors: Juan Chen, Fredrik B. Hallgren
  • Publication number: 20130313250
    Abstract: Methods and apparatuses for processing objects by RF energy are disclosed. In some embodiments the method may include grouping excitation setups into at least a first group corresponding to a first peak and a second group corresponding to a second peak. The method may further include applying RF energy such that an amount of RF energy absorbed at excitation setups of the first group is equal to an amount of RF energy absorbed at excitation setups of the second group. Apparatuses according to some embodiments may include a processor configured to carry out aspects of the method.
    Type: Application
    Filed: May 24, 2013
    Publication date: November 28, 2013
    Inventors: Zalman Ibragimov, Amit Rappel, Itzhak Yogev
  • Publication number: 20130306627
    Abstract: The present disclosure relates to an apparatus for processing objects with RF energy. The apparatus may include a display for displaying to a user an image of an object to be processed, the image including at least a first portion and a second portion of the object. The apparatus may also include an input unit and at least one processor configured to: receive information based on input provided to the input unit; and generate, based on the received information, processing information for use in processing the object to achieve a first processing result in the first portion of the object and a second processing result in the second portion of the object.
    Type: Application
    Filed: February 11, 2012
    Publication date: November 21, 2013
    Applicant: GOJI LTD.
    Inventors: Avner Libman, Eyal Torres, Amichai Ron, Steven Rogers, Daniella Atzmony, Eliezer Gelbart
  • Publication number: 20130284725
    Abstract: A method of heating and/or thawing using an RF heater is described. In some cases the heating differentially heats portions according to their dissipation ratios. Optionally, this avoids dissipating large amounts of energy into thawed portions while frozen portions are still extant and heat slowly. Optionally, this prevents overheating of thawed potions.
    Type: Application
    Filed: June 21, 2013
    Publication date: October 31, 2013
    Inventors: Alexander Bilchinsky, Eran Ben-Shmuel, Daniella Atzmony
  • Publication number: 20130256302
    Abstract: The present invention related to devices and methods that use returned power (RP) measurements during microwave energy delivery to perform one or more functions. For example, microwave devices and systems that comprise one or more features to measure the returned microwave power. One or more measurements of the returned microwave power may be used to obtain information about one or more of: antenna shape, system status and system performance. One or more measurements of the returned microwave power shaping elements may also be used to obtain information about one or more properties of the target material. The invention also discloses devices and methods for delivering microwave energy to a variety of target materials to achieve a variety of desired microwave effects.
    Type: Application
    Filed: April 1, 2013
    Publication date: October 3, 2013
    Inventors: Chun Yiu CHU, Dinesh I. MODY, Ketan SHROFF, Amrish J. WALKE, Kirby CHIANG, Christopher Ah NEW, Christine M. TATE
  • Publication number: 20130146590
    Abstract: Apparatuses and methods are disclosed for applying radio frequency (RF) energy from a source of electromagnetic energy to an object in an energy application zone. At least one processor may be configured to acquire information indicative of electromagnetic energy loss associated with at least a portion of the energy application zone. The processor may be further configured to determine a weight to be applied to each of a plurality of electromagnetic field patterns each having a known electromagnetic field intensity distribution and cause the source to supply each of the plurality of electromagnetic field patterns to the energy application zone at the determined weights.
    Type: Application
    Filed: May 3, 2011
    Publication date: June 13, 2013
    Inventors: Pinchas Einziger, Eran Ben-Shmuel, Alexander Bilchinsky, Amit Rappel
  • Publication number: 20130142923
    Abstract: A method of processing an object is disclosed. The method comprises heating the object by applying radio frequency (RF) energy, monitoring a value related to a rate of absorption of RF energy by the object during the heating, and adjusting the RF energy in accordance with changes in a time derivative of the monitored value.
    Type: Application
    Filed: June 30, 2011
    Publication date: June 6, 2013
    Inventors: Eyal Torres, Daniel Selinger
  • Patent number: 8420991
    Abstract: A microwave heating apparatus includes a microwave generation part (5) having a plurality of output parts, a heating chamber (4) to contain an object to be heated, a plurality of feeding parts (21a, 21b, 21c, 21d) supplying outputs of the plurality of output parts to the heating chamber, and a control part (6) controlling microwave radiation from the plurality of feeding parts to control an electromagnetic wave distribution in the heating chamber, in which a microwave is concentrated on the object to be heated put in the heating chamber.
    Type: Grant
    Filed: July 10, 2008
    Date of Patent: April 16, 2013
    Assignee: Panasonic Corporation
    Inventors: Makoto Mihara, Tomotaka Nobue, Kenji Yasui, Yoshiharu Oomori
  • Publication number: 20130056460
    Abstract: Devices and methods for RF heating of food, using techniques which allow uniformity and/or controlled non-uniformity.
    Type: Application
    Filed: October 26, 2012
    Publication date: March 7, 2013
    Applicant: Goji Ltd.
    Inventors: Eran Ben-Shmuel, Alexander Bilchinsky, Udi Damari, Omer Einav, Benny Rousso, Shlomo Ben-Haim
  • Patent number: 8378275
    Abstract: The invention described herein generally pertains to coupling microwave energy into a tuned multi-section WR-975 waveguide assembly, connected to a waveguide containing a ceramic cylindrical applicator, terminated in a dummy load, for pre-heating fuels to improve vaporization, combustion efficiency, and soot reduction in combustion chamber(s). Designed primarily for processing liquid byproducts produced during biodiesel fuel manufacturing, this invention establishes a charge density in a cross-coupled applicator, according to the applicator's volume, dielectric characteristics of the materials being processed, applied frequency, and voltage. This invention may also be used for preheating or polarization of solids within a pipe-conveyed slurry, such as biosolids, bituminous coal, crude oil sludge, paper pulp or shale oil rock.
    Type: Grant
    Filed: December 7, 2010
    Date of Patent: February 19, 2013
    Inventor: John F. Novak
  • Patent number: 8338763
    Abstract: A microwave heating device and a method for heating a load using microwaves are provided. The microwave heating device comprises a cavity adapted to receive a load and at least two microwave sources for feeding microwave energy into the cavity through at least two feeding ports respectively. The microwave heating device further comprises at least two field sensors adapted to measure field strengths of the microwave energy in the cavity. A first field sensor is arranged at a first location for measuring the field strength representative of a mode fed from a first feeding port and a second field sensor is arranged at a second location for measuring the field strength representative of a mode fed from a second feeding port. The microwave heating device further comprises a control unit connected to the microwave sources and the field sensors for regulating the microwave sources based on the measured field strengths.
    Type: Grant
    Filed: April 5, 2010
    Date of Patent: December 25, 2012
    Assignee: Whirlpool Corporation
    Inventors: Ulf Erik Nordh, Olle Niklasson, Fredrik Hallgren, Hakan Carlsson
  • Patent number: 8188409
    Abstract: The invention relates to a temperature probe for an oven, comprising in one embodiment a longitudinal housing in the form of a spit. A temperature sensor and an electronic unit are arranged in a tip and are connected at the other end to emitting means. The temperature probe comprises a thermogenerator for producing energy. The thermogenerator uses a temperature difference between a higher temperature inside the oven and a lower core temperature in a food product, such as roast, in which the temperature probe is inserted, for producing energy for operating the emitting means.
    Type: Grant
    Filed: September 28, 2009
    Date of Patent: May 29, 2012
    Assignee: E.G.O. Elektro-Geraetebau GmbH
    Inventor: Martin Baier
  • Publication number: 20100107435
    Abstract: Methods and apparatus for drying ceramic green bodies include providing one or more ceramic green bodies in a microwave heating chamber operatively connected to a microwave source and a PLC. The total mass of the ceramic green bodies present in the microwave heating chamber is determined. Microwave energy is generated with the microwave source and transmitted from the microwave source to the microwave heating chamber. A transmitted power of the microwave energy transmitted from the microwave source to the microwave heating chamber is measured with power sensors. The reflected power of reflected microwave energy reflected back from the microwave heating chamber is also measured. The power of the microwave energy transmitted from the microwave source to the microwave heating chamber is adjusted based on the total mass of ceramic green bodies present in the microwave heating chamber, the measured transmitted power and the measured reflected power.
    Type: Application
    Filed: October 31, 2008
    Publication date: May 6, 2010
    Inventors: Jacob George, Parasuram Padmanabhan Harihara, Min Shen
  • Patent number: 7586070
    Abstract: The present invention describes a bolometric device with receiving cavity for measuring a beam of high frequency microwaves, comprising a hollow body (1) with receiving cavity (50) having an opening (2) for the entrance of said beam of high frequency microwaves in said receiving cavity (50), a diverging mirror (3) located in the lower part of said cavity (50) for reflecting said beam of microwaves on an absorbent coating material (4) applied on the internal surface (5) of the hollow body (1), a cooling circuit (7) for transferring the thermal energy accumulated on the absorbent coating material (4) and a circuit (6) for measuring the power of the beam of high frequency microwaves entering the hollow body (1). Said absorbent coating material (4) consists of boron carbide. In addition a procedure is described for coating with an absorbent material the internal surface (5) of a hollow body (1) being part of the aforementioned device for measuring a beam of high frequency microwaves (FIG. 1).
    Type: Grant
    Filed: February 1, 2006
    Date of Patent: September 8, 2009
    Assignee: Consiglio Nazionale Delle Ricerche
    Inventors: Nicolò Spinicchia, Alessandro Bruschi, Sante Giovanni Cirant, Valerio Muzzini, Antonio Nardone
  • Patent number: 7105787
    Abstract: A method and apparatus for adaptively maintaining the power-frequency spectrum in a reverberation chamber. The invention is thus capable of maintaining a relatively constant power-frequency spectrum in the chamber even when a device under examination is placed into the chamber which exhibits selective frequency absorption and or directional frequency absorption. The object disposed within the chamber need not necessarily be a device under examination. Rather, the present invention can also adaptively maintain a relatively constant power-frequency spectrum when heating any material disposed within a electromagnetic wave chamber.
    Type: Grant
    Filed: October 29, 2003
    Date of Patent: September 12, 2006
    Assignee: Fiore Industries, Inc.
    Inventor: Mark J. Clemen, Jr.
  • Patent number: 7096599
    Abstract: A household appliance (1) e.g a washer-dryer, comprises an enclosure (2) into which objects to be heated are placed, a magnetron (4) for generating microwaves, a waveguide (3) for feeding the generated microwave into the enclosure, an arc detector (5) coupled to the waveguide (3) for detecting the arcing within the enclosure (2) and a control unit (6).
    Type: Grant
    Filed: December 6, 2001
    Date of Patent: August 29, 2006
    Inventors: Cem Kural, Serdal Elmas
  • Patent number: 6940055
    Abstract: A microtiter plate system includes an integral heater. In an embodiment, the integral heater includes a heater plate. In another embodiment, the integral heater includes resistive heater wires positioned beneath and/or between the wells of a microtiter plate. In an embodiment, the microtiter plate system includes optically clear well bottoms that permit sensing and measurement of samples through the optically clear well bottoms. In an implementation, an optically clear heater is positioned beneath the optically clear well bottoms. In an alternative implementation, resistive heater wires are positioned between the wells. In an embodiment, the microtiter plate system includes a microtiter plate lid with an integral heater, which can be implemented using a heater plate, resistive wires, and the like.
    Type: Grant
    Filed: June 18, 2002
    Date of Patent: September 6, 2005
    Assignee: Johnson & Johnson Pharmaceutical Research & Development, L.L.C.
    Inventors: Joseph Kwasnoski, F. Raymond Salemme
  • Patent number: 6900421
    Abstract: A surgical and dental instrument sterilizer is described. Liquid water is rapidly vaporized by microwave heating and steam is generated to attain a steam pressure of approximately 47 psi and a temperature of approximately 135° C. in the region of the articles to be sterilized. Micron-size water-droplets are intermittently sprayed onto the articles which are arranged on a tray, from both the top and from underneath thereof so as to thoroughly wet the surfaces. A 30-90 s duration of droplet spray is followed by pulsed microwave irradiation of the top and underneath surfaces for a similar period, as an example; this is followed by a plurality of spray/microwave cycles.
    Type: Grant
    Filed: September 29, 2003
    Date of Patent: May 31, 2005
    Assignee: Ecofriend Technologies, Inc.
    Inventor: Ravi Varma
  • Patent number: 6884979
    Abstract: A microwave oven and a method for heating a load which is placed therein. According to the invention a predetermined mode in the cavity of a microwave oven is fed by means of an associated feeding port which is arranged to feed essentially the intended mode only, the feeding of a mode other than the intended, predetermined mode being essentially prevented.
    Type: Grant
    Filed: September 13, 2001
    Date of Patent: April 26, 2005
    Assignee: Whirlpool Corporation
    Inventors: Per Törngren, Ulf Nordh, Håkan Carlsson, Roland Ekinge
  • Publication number: 20040134904
    Abstract: A method and apparatus for adaptively maintaining the power-frequency spectrum in a reverberation chamber. The invention is thus capable of maintaining a relatively constant power-frequency spectrum in the chamber even when a device under examination is placed into the chamber which exhibits selective frequency absorption and or directional frequency absorption. The object disposed within the chamber need not necessarily be a device under examination. Rather, the present invention can also adaptively maintain a relatively constant power-frequency spectrum when heating any material disposed within a electromagnetic wave chamber.
    Type: Application
    Filed: October 29, 2003
    Publication date: July 15, 2004
    Applicant: Fiore Industries, Inc.
    Inventor: Mark J. Clemen
  • Patent number: 6737619
    Abstract: A microwave polymerization system for dentistry utilizes specifically controlled microwave energy to cure polymer materials so as to produce dental prosthetics, such as dentures, bridges and crowns, that are made in an extra-oral setting such as a dental laboratory or dental office, and to create dental composites for fillings and veneers that are used in an intra-oral setting directly in the patient's mouth. Unlike the microwave energy delivered by commercial microwave ovens, the system utilizes metered and controlled microwave energy that is preferably continuous and voltage controlled, and regulates the application of this microwave energy by use of various feedback and control mechanisms. The metered and controlled microwave energy enables a higher degree of conversion of monomers into polymer chains in the polymerization process, thereby enhancing the physical and biocompatibility characteristics of both dental prosthetics and dental composites made from polymers.
    Type: Grant
    Filed: June 10, 2002
    Date of Patent: May 18, 2004
    Inventors: Marc Seghatol, Jean-Pierre Durand