The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 03, 2002
Filed:
Apr. 05, 2001
Brian L. Clothier, O'Fallon, IL (US);
Amil J. Ablah, Wichita, KS (US);
Robert E. Wolters, Jr., Chicago, IL (US);
William W. Heine, Palatine, IL (US);
David E. May, Geneva, IL (US);
Thermal Solutions, Inc., Wichita, KS (US);
Abstract
Temperature self-regulating food delivery systems are provided having a magnetic induction heater ( ) and an associated food container ( ) equipped with an essentially permanent ferromagnetic heating element ( ). The heater ( ) and heating elements ( ) are designed so as to heat the element ( ) to a user-selected regulation temperature when the elements ( ) are coupled with the heater's magnetic field, and to maintain the temperature in the vicinity of the regulation temperature indefinitely temperature regulation is a heating achieved by periodically determining at least two parameters of the heaters resonant circuits related to the amplitude of the resonant current passing therethrough during heating and responsively altering the field strength of the magnetic field. Preferably, the value of the resonant circuit amplitude and the rate of change of the amplitude are determine.