Electric heating – Heating devices – With power supply and voltage or current regulation or...
Reexamination Certificate
2006-07-11
2006-07-11
Hoang, Tu (Department: 2832)
Electric heating
Heating devices
With power supply and voltage or current regulation or...
C219S443100, C366S273000
Reexamination Certificate
active
07075040
ABSTRACT:
A stirring hot plate for simultaneously heating and stirring a mixture includes a phase controlled motor that spins magnets which couple to, and thereby spin, a stir bar within the mixture. In addition to spinning the magnets, the motor includes an operational mode in which the motor is rapidly braked thereby quickly spinning down the stir bar. The stirring hot plate also includes a visual indicator to the user that the platform is hot-to-the-touch that is especially effective when the stirring hot plate is not in use.
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Earle Roger W.
Edwards James
Garz Eric
Hermsen Kenneth David
Jackson Eric
Barnstead Thermolyne Corporation
Hoang Tu
Wood Herron & Evans L.L.P.
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