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| Number | Title | Issue Date |
| 7339143 | Expanding system using plasma discharge The present invention relates to an expansion system using a plasma discharge in which in which a charged electric energy is fast discharged, so that a high pressure is generated within liquid based on an impact wave, which can be used in various industrial fields a... | 03/04/2008 |
| 7157674 | Induction heater with controlled current to heating coil A detector is operable to detect a displacement of a load by an ascending force based on a period of time from a time a heating output of an inverter drops from a predetermined level to a first level, to a time the heating output returns back to a second level large... | 01/02/2007 |
| 7129808 | Core cooling for electrical components A cooling system is provided for electrical components in which cooling assemblies (11, 45) are inserted in non-magnetic cores of the electrical components, and in which tubes provide both inflow and outflow of a cooling medium. The non-magnetic cores may be ... | 10/31/2006 |
| 7075044 | Induction heating cooking apparatus, operation of which is interrupted by container eccentricity An induction-heating cooking apparatus, operation of which is interrupted by container eccentricity is disclosed. Upon receiving an input signal varying with the degree of eccentricity of a container, the apparatus changes a reference signal for determining the pres... | 07/11/2006 |
| 7049564 | Induction heating device The present invention offers an induction heating apparatus in which the infrared sensor performs stable temperature detection without undergoing the influence of leakage magnetic flux from the induction heating means. This induction heating apparatus has a main fra... | 05/23/2006 |
| 7041946 | Energization cycle counter for induction heating tool An induction heat treating process with a remote sensor for monitoring the duration of energization of an induction heating coil each time the induction heating coil is consecutively cycled. An identifying tag is preferably attached to, embedded within the induction... | 05/09/2006 |
| 7021084 | Insulation shielding for glass fiber making equipment An energy-efficient inductive heater operable to heat a rotary glass fiber discharging spinner. The heater includes shielding disposed between the induction coil and the metal guard plates of the heater. The shielding may comprise any electrically insulative or diel... | 04/04/2006 |
| 7019270 | System for reducing noise from a thermocouple in an induction heating system A method and apparatus for reducing electrical noise in an electrical signal from a temperature feedback device to an induction heating system. The induction heating system has an electrical connector that is adapted to electrically couple a temperature feedback dev... | 03/28/2006 |
| 7009159 | Induction heating apparatus having electrostatic shielding member An induction heating apparatus with high safety is provided in which leakage current is prevented from flowing to the human body and there is no possibility of an electric shock even when an electrostatic shielding member does not sufficiently perform its function. ... | 03/07/2006 |
| 6992406 | Induction heating or melting power supply utilizing a tuning capacitor A rectifier/inverter power supply for use with induction heating or melting apparatus includes a tuning capacitor connected across the output of the rectifier and input of the inverter. The tuning capacitor forms a resonant circuit with an inductive load coil at the... | 01/31/2006 |
| 6965098 | Energization cycle counter for induction heating tool An induction heat treating process with a sensor for monitoring the duration of energization of an induction heating coil each time the induction heating coil is consecutively cycled. The sensor is preferably a counting mechanism attached to or embedded within the i... | 11/15/2005 |
| 6956189 | Alarm and indication system for an on-site induction heating system An induction heating system having a fluid cooling unit, a power source, an induction heating device, a controller, and an alarm system to place the system in a safe condition when an improper operating condition is detected. The induction heating system may have a ... | 10/18/2005 |
| 6861626 | Induction heating roller device for use in image forming apparatus An induction heating roller device that keeps leakage current within specifications and prevents the occurrence of erroneous operations caused by common mode noise. The induction heating roller device includes an induction coil, a grounded heating roller magneticall... | 03/01/2005 |
| 6815650 | Energization cycle counter for induction heating tool An induction heat treating process with a sensor for counting the amount of cycles attributable to an inductor coil. The sensor is preferably a counting mechanism attached to or embedded within the induction coil and is preferably triggered by and responds to the ch... | 11/09/2004 |
| 6806447 | Spatula induction heating apparatus A spatula heating apparatus with excellent usability which overcomes drawbacks inherent to conventional gas burner type and electro-thermal type apparatuses. A spatula heating apparatus for heating spatulas 9, 9a for wax molding includes a heating coil... | 10/19/2004 |
| 6801443 | Power supply with snubber circuit A method and apparatus for providing welding-type power supply is disclosed. It includes an inverter power circuit, a bus inductor, a snubber circuit a snubber capacitor voltage feedback circuit, and a control circuit. The inverter circuit includes a bus, switches, ... | 10/05/2004 |
| 6713737 | System for reducing noise from a thermocouple in an induction heating system A method and apparatus for reducing electrical noise in an electrical signal from a temperature feedback device to an induction heating system. The induction heating system has an electrical connector that is adapted to electrically couple a temperature feedback dev... | 03/30/2004 |
| 6590190 | Induction system and safe armature The invention concerns an induction system for heating, re-heating and keeping warm a food container combining an armature beneath the container, an induction device supporting the container optimised for the safety of the user, the electromagnetic compat... | 07/08/2003 |
| 6472748 | System and method for providing MMIC seal A system and method for maintaining desired circuit component attributes is shown. According to a preferred embodiment, a high frequency circuit component, such as a MMIC, is retained in a circuit using a degradeable material, such as silver filled epoxy,... | 10/29/2002 |
| 6359269 | Heating device, image forming apparatus, and electric-power control method A heating device for heating a material to be heated according to a magnetic-induction heating method includes a magnetic-field generator for generating a magnetic field, an electromagnetic-induction heating member for performing electromagnetic-induction... | 03/19/2002 |
| 5880436 | Fail-safe convection oven assembly An oven assembly having a housing enclosing a cooking compartment and a blower compartment, and having a blower for circulating air within the cooking compartment, a door mounted to the housing, and a failsafe switch that is capable of deactivating the bl... | 03/09/1999 |
| 5397878 | Powder transistor driving circuit of electromagnetic induction heating device A power transistor driving circuit for use in an electromagnetic induction heating device comprises an induction coil circuit and a driving circuit. The induction coil circuit is provided with an induction connected with an oscillating circuit made up of ... | 03/14/1995 |
| 4962292 | High-frequency heating apparatus having digital controlled inverter A high-frequency heat source supplies a predetermined high-frequency heat output. An inverter circuit receives an AC input and supplies a high-frequency output to drive the high-frequency heat source. The inverter circuit includes a circuit for rectifying... | 10/09/1990 |
| 4908489 | Induction heating driver circuit The present invention is an improved induction heating apparatus and more particularly a improved oscillation control circuit. The induction heating apparatus includes at least one induction coil, with a parallel capacitance forming an LC oscillation circ... | 03/13/1990 |
| 4870239 | Induction heater for drums An induction heater (1) includes a substantially cylindrical jacket adapted to be placed around an article which is to be induction heated, an induction coil (5) arranged within the jacket, and protuberances (4) projecting inwardly from the internal surfa... | 09/26/1989 |
| 4760231 | Noise filter for electric apparatus A noise filter connected to power lines includes two coils connected to the power lines in series, respectively, two capacitances connected to one end of the coils, respectively, and at least one resistance for reducing the gain of a resonance frequency o... | 07/26/1988 |
| 4757177 | High-frequency induction heating system with circuit protective feature A high-frequency induction system can generally be achieved by detecting noise superimposed on AC power supply which might induce voltages exceeding the given break-down voltage of a switching device and in such cases by temporarily shutting off the power... | 07/12/1988 |
| 4701588 | Oscillation control circuit of an induction heating apparatus This invention relates to an induction heating apparatus including a digitized control circuit and digitizing the ON/OFF control circuit for a switching element which has hitherto utilized the R-C time constant, thereby eliminating the defects, such as a ... | 10/20/1987 |
| 4638138 | High frequency inverter circuit for melting and induction heating A two-pole inverter bridge has an inductor mounted between the two controlled switches in each pole and a resonant load is connected across the poles between ends of the inductors which are similarly situated relative to the terminals. In each pole one an... | 01/20/1987 |
| 4599504 | Induction heating apparatus with protection against power interruption According to the present invention, an induction heating apparatus comprises a rectifying circuit for rectifying an AC voltage from an AC power source, an inverter circuit for converting a DC output from the rectifying circuit to a high frequency current ... | 07/08/1986 |
| 4555608 | Inverter device for induction heating An induction heating device makes use of a bridge inverter and has a DC power source, a plurality of switching elements forming a bridge inverter, and a circuit for detecting the turn-off of the switching elements. In order to detect the turn-off of the s... | 11/26/1985 |
| 4370703 | Solid state frequency converter A plurality of SCR diamond bridge circuits are coupled in series to generate frequencies higher than the individual operating frequencies of the SCR's. The series chain of diamond circuits is preferably coupled in parallel with the series combination of a... | 01/25/1983 |
| 4234917 | Commutation failure detection and restoration for SCR frequency converters A frequency converter having a silicon controlled rectifier comprises a protection circuit which includes a series resonant circuit connected in parallel with the silicon controlled rectifier to generate a reverse voltage thereacross in response to a shor... | 11/18/1980 |
| 4112286 | Power circuit for induction heating A power circuit for use in billet heating, surface heat treating and melting and protective circuitry associated therewith. The power circuit generally comprises a source of potential in series with a pair of inductances and an inverter module. The invert... | 09/05/1978 |
| 4095076 | Protective device for induction heating apparatus A protective device for induction heating apparatus is disclosed. The device includes an excitor supplied with operating voltage for induction-heating a heating element and a detecting device for detecting the state of the heating element. Means are provi... | 06/13/1978 |
| 4058696 | Induction heating apparatus comprising a static converter An induction heating apparatus comprising a static converter including a bidirectional controlled switch having a main thyristor and a diode connected in parallel to conduct in opposite directions. The converter comprises a first circuit for protection ag... | 11/15/1977 |
| 4015084 | Protective device for induction heating apparatus A protective device for induction heating apparatus is disclosed. The device includes an excitor supplied with operating voltage for induction-heating a heating element and a detecting device for detecting the state of the heating element. Means are provi... | 03/29/1977 |
| 3978307 | Induction heating apparatus with protective circuit arrangement An induction heating apparatus is provided with protective circuit arrangements which ensure against surge currents caused by inappropriately timed gating-on of a gate controlled rectifier or by erroneous use of a load material such as non-magnetic or fer... | 08/31/1976 |
| 3973105 | Protective device for induction heating apparatus A protective device for an induction heating apparatus comprising: means for detecting a change of value and phase of a current passed to an excitor for induction-heating a heating element by generating an alternating magnetic field; and means for breakin... | 08/03/1976 |
