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Class Information
Number: 219/661
Name: Electric heating > Inductive heating > With power supply system > Power switching
Description: Subject matter wherein a device controls the on and off periods of energy being supplied from the power supply to the inductive heating apparatus.

Sub-classes under this class:

Class Number Class Name Patents
219/663 Condition responsive 150
219/662 Plural load inductors 117
219/669 Polyphase 14
219/668 With protection 44

Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
8617472 System for protecting circuitry in high-temperature environments Dec. 31, 2013
8563896 Systems and methods to modify gas metal arc welding and its variants Oct. 22, 2013
8492685 Method for controlling a static power conversion unit and induction heating system for cooling appliances using such method Jul. 23, 2013
8476563 Induction heating cooker and control circuit therefor Jul. 2, 2013
8461497 Power supply circuitry for inductive heating element and capable of minimizing losses to switching element Jun. 11, 2013
8357883 Induction heating system for a motor-driven vehicle Jan. 22, 2013
7974113 Electric power unit for induction heating Jul. 5, 2011
7973268 Induction heating cooking device Jul. 5, 2011
RE42362 Induction heating system and method May. 17, 2011
7910865 Method and arrangement for supplying power to several induction coils in an induction apparatus Mar. 22, 2011
7767941 Inductive heating method utilizing high frequency harmonics and intermittent cooling Aug. 3, 2010
7713471 System for protecting circuitry in high-temperature environments May. 11, 2010
7589301 Induction heating device having plural resonant circuits Sep. 15, 2009
7582851 Gradient induction heating of a workpiece Sep. 1, 2009
7459659 Induction heating circuit and winding method for heating coils Dec. 2, 2008
7442907 Induction heating cooking device Oct. 28, 2008
7368691 Induction heating apparatus May. 6, 2008
7282680 Apparatus for controlling inverter circuit of induction heat cooker Oct. 16, 2007
7279665 Method for delivering harmonic inductive power Oct. 9, 2007
7253381 Multi-frequency heat treatment of a workpiece by induction heating Aug. 7, 2007
7151242 Induction heating system and method Dec. 19, 2006
7145114 Superheated vapor generator Dec. 5, 2006
7119311 Induction circuit for contactless power supply apparatus Oct. 10, 2006
7115846 Shrinking arrangement for tool holder having an induction-heating arrangement Oct. 3, 2006
7094997 Heating device and fixing device Aug. 22, 2006
7087870 Induction heating or melting with multiple frequencies Aug. 8, 2006
7049565 Inductive heating of semi-solid material May. 23, 2006
7049764 Electrodeless lighting apparatus using microwave and method for controlling power thereof May. 23, 2006
7034264 Heating systems and methods utilizing high frequency harmonics Apr. 25, 2006
7034263 Apparatus and method for inductive heating Apr. 25, 2006
7026586 Induction heating apparatus with current modulating means Apr. 11, 2006
6943329 Induction heating system for reduced switch stress Sep. 13, 2005
6943330 Induction heating system with resonance detection Sep. 13, 2005
6936800 Heating device and fixing device Aug. 30, 2005
6861630 Heating device and fixing device Mar. 1, 2005
6861626 Induction heating roller device for use in image forming apparatus Mar. 1, 2005
6806448 Induction heating device with a switching power source and image processing apparatus using the same Oct. 19, 2004
6727482 Apparatus and method for inductive heating Apr. 27, 2004
6700105 Induction heating system and method for internal combustion engine Mar. 2, 2004
6696675 Induction heating system for internal combustion engine Feb. 24, 2004
6683286 Method and apparatus for producing power for induction heating with bus bars comprised of plates Jan. 27, 2004
6677560 Apparatus for inductively heating a workpiece Jan. 13, 2004
6670588 Inductive heating roller apparatus Dec. 30, 2003
6649022 Ventilated sealing head for induction sealer Nov. 18, 2003
6649888 Radio frequency (RF) heating system Nov. 18, 2003
6617556 Method and apparatus for heating a submarine pipeline Sep. 9, 2003
6608289 Heating apparatus and image forming apparatus Aug. 19, 2003
6531689 Fixing device using an inverter circuit for induction heating Mar. 11, 2003
6504135 Temperature self-regulating food delivery system Jan. 7, 2003
6498324 Induction heating device for rolling roller and method of induction heating Dec. 24, 2002

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