Electric heating – Heating devices – With power supply and voltage or current regulation or...
Reexamination Certificate
2006-10-03
2006-10-03
Paschall, Mark (Department: 3742)
Electric heating
Heating devices
With power supply and voltage or current regulation or...
C219S497000, C219S508000, C219S665000
Reexamination Certificate
active
07115843
ABSTRACT:
The present invention generally relates to a high-frequency pulse oscillator, and more particularly to a high-frequency pulse oscillator adapted to provide pulse currents having a high frequency and large amplitude so as to transition metallic materials into a plastic state for ease of processing or for closing microcracks formed in metallic parts in order to recover mechanical characteristics thereof. The high-frequency pulse oscillator of the present invention comprises a controllable rectifier, a switching section, and a control system. The controllable rectifier rectifies alternating currents supplied from a current source to output currents having a predetermined waveform, according to a control signal from the control system. The switching section generates pulse currents using the currents from the rectifier, according to another control signal from the control system. The switching section comprises at least one switching block, which is connected so that the amplitude of the pulse currents is increased. The control system controls the rectifier and the switching section according to the signals to start, stop, and reset the operation of generating the pulse currents and the signals to specify or change the frequency and amplitude of the pulse currents, so that the generated pulse currents may have desired frequency and amplitude. The pulse currents generated in the high-frequency pulse oscillator enable the manufacture of various structural parts without degrading their structure.
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Japanese Office Action dated Apr. 14, 2006.
Anisimov Eduard I
Drojjine Alexandre S.
Jee Won-Guk
Kim Stanislav K
Martynov Vladimir A.
Kyong In Special Metal Co., Ltd.
Paschall Mark
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