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:
Mar. 26, 2013
Filed:
Aug. 04, 2010
Gonzalo José Fernández Llona, Elorrio, ES;
Javier Rubiales Garrido, Mondragón, ES;
Gonzalo José Fernández Llona, Elorrio, ES;
Javier Rubiales Garrido, Mondragón, ES;
Coprecitec, S.L., Aretxabaleta (Gipuzkoa), ES;
Abstract
A method for controlling an induction apparatus having an induction coil. In one implementation the induction apparatus includes a capacitor that is connected in parallel with the induction coil to form a parallel resonant circuit, and also includes a switch connected in series with the parallel resonant circuit, between the parallel resonant circuit and a reference voltage. According to one method, a digital test signal dependent on the voltage in a node disposed between the switch and the parallel resonant circuit is generated, the switch is closed for a predetermined closure time and then reopened at the end of the closure time. With the switch reopened, the test signal is evaluated for a predetermined waiting time in order to determine the presence or absence of a vessel on the induction coil.