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| Number | Title | Issue Date |
| 7109457 | In situ processing of hydrocarbon-bearing formations with automatic impedance matching radio frequency dielectric heating A hydrocarbon bearing formation (304) which is heated using a automatic impedance matching (181) capacitive radio frequency dielectric heating (334) in situ process. Hydrocarbons or other substances natural to a hydrocarbonaceous formation may b... | 09/19/2006 |
| 7091460 | In situ processing of hydrocarbon-bearing formations with variable frequency automated capacitive radio frequency dielectric heating A hydrocarbon bearing formation which is heated using a variable frequency automated capacitive radio frequency dielectric heating in situ process. Hydrocarbons or other substances natural to a hydrocarbonaceous formation may be produced by heating specific chemical... | 08/15/2006 |
| 6784407 | Bench top tubing sealer A desk top sealer includes three compartments for housing a solenoid assembly, a power supply and a circuit board, respectively. A source of air flow flows into an initial compartment and is channeled through apertures in brackets forming the two remaining compartme... | 08/31/2004 |
| 6657173 | Variable frequency automated capacitive radio frequency (RF) dielectric heating system A food product is heated by maintaining the food product in an AC electrical field generated by an RF signal. As the heating takes place, maximum energy is delivered to the food product using automatic impedance matching to adjust the rate of the process.... | 12/02/2003 |
| 6509557 | Apparatus and method for heating single insulated flowlines Apparatus and method are provided for electrically heating subsea pipelines. An electrically insulating layer is placed over the pipe in the segment of the pipeline to be heated and electrical current is caused to flow axially through the steel wall of th... | 01/21/2003 |
| 6486456 | Fusing processing method In odd-numbered current-supplying periods of a plurality of current-supplying periods constituting a gross current-supplying time, a control unit 42 allows continuous switching actions of only a first set of switching elements at an inverter frequency, wi... | 11/26/2002 |
| 6423955 | High frequency dielectric heating system A method and apparatus for dielectric drying is disclosed wherein a load to be heated positioned on a carrier the bottom of which provides a secondary electrode is moved with the carrier a dielectric heating chamber having a primary electrode positioned a... | 07/23/2002 |
| 6417499 | Dielectric heating using inductive coupling A method and apparatus for heating or drying material by applying radio frequency (RF) power to a material in a resonant cavity; wherein an RF power source is inductively coupled to a resonant cavity formed by distributed inductance in resonance with the ... | 07/09/2002 |
| 6350973 | Radio-frequency and microwave-assisted processing of materials There is described a hybrid furnace comprising a microwave source, and an enclosure for the confinement of both microwave and RF energy for containing an object to be heated. The microwave source is coupled to the enclosure. The furnace further includes a... | 02/26/2002 |
| 6246040 | Solid state RF generator for dielectric heating of food products A solid state radio frequency (RF) generator for dielectric heating of food products. In the preferred embodiment, a distributed oscillator comprising an array of solid state devices (e.g., MOSFETs) and a high voltage inductor drives a capacitor to produc... | 06/12/2001 |
| 6169278 | Dielectric heating using spread-spectrum energy A dielectric heater for subject material by connecting an RF source, modulated to produce a spread-spectrum signal to a radio frequency applicator for the subject material, without requiring an impedance matching network. The carrier frequency of the RF s... | 01/02/2001 |
| 6080978 | Dielectric drying kiln material handling system A dielectric drying kiln material handling system includes a bottom electrode incorporating a conveyor system for moving material along said bottom electrode for moving material on and off of the electrode. Conveyors are built into the electrode in a mann... | 06/27/2000 |
| 5942146 | Dielectric drying kiln electrode connector A dielectric drying kiln having a moveable electrode permanently electrically connected with a source of power via an electrical connector formed by a plurality of discrete interconnected electrically and mechanically interconnected conducting element tha... | 08/24/1999 |
| 5750971 | Apparatus for controlling RF generators to weld plastic materials Radio frequency power for melting, sealing and welding plastic tubing compressed between a pair of manually or automatically actuated electrically conducting jaws of a hand held or fixed base tubing sealer is regulated by a pulse width modulator controlli... | 05/12/1998 |
| 5420402 | Methods and apparatus to confine earth currents for recovery of subsurface volatiles and semi-volatiles Improved methods and apparatus are disclosed for confining ohmic heating currents to a subsurface formation in the use of in situ ohmic heating for recovery of volatile and semi-volatile materials, such as hazardous waste, hydrocarbon-like materials, and ... | 05/30/1995 |
| 5286941 | High frequency heating generator having an improved matching network between a tetrode amplifier and a resonant circuit A high frequency heating generator which includes an electron tube amplifier, the output of which is connected to a resonant circuit that is electromagnetically coupled to a part to be heated, and a controlled frequency oscillator. The oscillator outputs ... | 02/15/1994 |
| 5250775 | Electric cooking apparatus adapted for generating high power output containing a battery An electric cooking apparatus includes a single power converter section for converting power supplied from an external AC power source. A heating-energy radiator section receives the converted power from the power converter section and radiates heating en... | 10/05/1993 |
| 5170040 | Device for supplying energy to a heated window pane from an electrical network of a motor vehicle The device for energizing a heating element of a window pane from a direct current network of a motor vehicle includes a converting device for converting the d.c. voltage of the direct current network into an alternating current voltage of a predetermined... | 12/08/1992 |
| 5101085 | High dielectric constant material to shape electric fields for heating plastics Apparatus for heating a plastic sheet uses a high dielectric constant material (HDCM) to shape an RF electric field to be either concentrated or uniform as desired depending upon the object to be formed from the sheet. Electrodes can be annular with a cir... | 03/31/1992 |
| 5100259 | Cold cap subsidence for in situ vitrification and electrodes therefor An electrode for use in in situ vitrification of soil comprises a molybdenum rod received within a conductive sleeve or collar formed of graphite. Electrodes of this type are placed on either side of a region containing buried waste material and an electr... | 03/31/1992 |
| 4775769 | Method of baking utilizing radio frequency energy and metal containers In a method of baking using an open face container a radio frequency field is applied between the container and the material to be baked therein in order to enhance the heating of the material and thus shorten the baking time. The method can be used in a ... | 10/04/1988 |
| 4739140 | Apparatus and method for electrical heating of food products Apparatus and a method for food processing wherein an AC electrical current at a frequency exceeding mains frequencies is caused to pass through a food product producing direct resistance heating of the food product, the frequency being selected to preclu... | 04/19/1988 |
| 4670634 | In situ decontamination of spills and landfills by radio frequency heating A water-containing region at or near the surface of the earth, such as a landfill, that is contaminated with hazardous materials is decontaminated by heating the region with bound radio frequency energy from a bound-wave transmission line excitor array di... | 06/02/1987 |
| 4629851 | Apparatus for heating a layer of dielectric material using radio frequency waves A dielectric layer is located between two capacitor electrodes and is heated by a radio frequency transmitted from a radio frequency generator. In order to conduct a high energy from the generator into the load, a coaxial line having a length which corres... | 12/16/1986 |
| 4542274 | Device for applying symbols to protein-containing material A device for applying marking symbols to an animal's hide, a piece of meat's surface and like protein-containing tissue by locally dielectrically heating the tissue using high frequency electromagnetic energy to thereby dissect the protein structure and p... | 09/17/1985 |
| 4531038 | Radio frequency dielectric heater An RF dielectric heater has a variable power output and stable output frequency. A power controller provides variable phase angle control of three-phase AC power. A delta-wye power transformer is coupled between the power controller and a rectifier circui... | 07/23/1985 |
| 4529859 | Blood tubing sealing unit A solenoid operated moveable jaw cooperates with a fixed jaw protruding from a blood tubing sealing unit and formed as part of a relatively massive heat sink to effect seals on liquid filled plastic tubing upon transmission of RF energy timed to coincide ... | 07/16/1985 |
| 4517427 | Frequency resonance heater An AC voltage is applied to feeder end points of an electrode assembly enclosed within a body of liquid through which current is conducted to generate heat. The current path has a minimum effective length of a quarter wave antenna of the single wire dipol... | 05/14/1985 |
| 4476364 | Radio frequency heating system for heating thermoplastic material preforms This relates to a radio frequency heating system for heating PET preforms. The system includes two parallel applicator plates or electrodes and the coupling of a radio frequency power supply thereto. Both the radio frequency applicators are isolated from ... | 10/09/1984 |
| 4362918 | Radiation absorbing apparatus Apparatus serving to significantly reduce the amount of unwanted radiation leakage of radio frequency energy normally present at high levels ambient to radio frequency dielectric heating equipment used extensively in connection with the manufacture of the... | 12/07/1982 |
| 4296294 | Method and apparatus for drying and setting the adhesive on books by vaporization of water using RF energy A method and apparatus for drying and setting the adhesive on the backs of books contained in book blocks or similar articles by vaporizing the water using high frequency RF energy. The books are generally mounted in clamps and moved on a conveyor from th... | 10/20/1981 |
| 4296299 | Apparatus for thawing frozen food in a refrigeration appliance Food thawing apparatus is disclosed specifically adapted for use in a refrigeration appliance. An enclosure having good thermal communication with surrounding environment is provided with a pair of planar electrodes defining a food thawing zone. One of th... | 10/20/1981 |
| 4296298 | Dielectric cooking apparatus A dielectric heating oven having a set of parallel spaced electrodes alternately grounded and every ungrounded electrode fed by electromagnetic energy from a common source in an ISM band preferably from 13.56 megacycles to 40.68 megacycles. Food is placed... | 10/20/1981 |
| 4258240 | Method and apparatus for radio frequency drying of lumber In a method of drying boards by radio-frequency heating a stack of boards is passed between live and earthed electrodes. The connections to the electrodes are periodically reversed so that each is alternately live and earthed; this increases the uniformit... | 03/24/1981 |
| 4218830 | Device for drying the sizing of spun glass filaments or the like The invention relates to a device for drying the sizing of spun glass filaments by high frequency heating during the winding operation. To promote drying, the electrodes next to the roll are enclosed by housings into which hot air is blown.... | 08/26/1980 |
| 4196329 | Situ processing of organic ore bodies Apparatus for fracturing and/or heating subsurface formations wherein an alternating current electric field is produced in the frequency range between 100 kilohertz and 100 megahertz between electrodes spaced apart in the formation and a radio frequency g... | 04/01/1980 |
| 4123305 | Method of heating for connecting a plate element to a support by means of a thermofusible glue A carpet or like covering is fastened to a floor or like support surface by a sheet comprising a thermo-fusible material interposed between the carpet and floor. A field of vibrations suitable for heating the thermo-fusible material is applied to the expo... | 10/31/1978 |
| 4119826 | Dielectric heat generator A dielectric heat generator in which radio frequency energy derived from a radio frequency oscillator is divided into two separate ratio frequency components which are equal but out of phase with each other. Each component is applied to a separate electro... | 10/10/1978 |
| 4028518 | Device for superficially heating an adjacent body Device for superficially heating an adjacent body comprising a high frequency resonator means for producing an electromagnetic field inside said resonator at the resonant frequency of said resonator when said device is adjacent a surface to be heated, and... | 06/07/1977 |
| 4007350 | Plant for the heat treatment of objects by means of an electric field The plant comprises two electrodes connected to a high-frequency generator and adapted to apply an electric field to the object to be heated. The first of the electrodes defines a space which is open on at least one of its sides and adapted to receive the... | 02/08/1977 |
