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:
Jan. 19, 2010
Filed:
Aug. 31, 2005
Patrick Leveque, Vire, FR;
Patrick Leveque, Vire, FR;
Seb S.A., Ecully, FR;
Abstract
A method is provided for the electrical protection of an electrical household appliance that is used to prepare food. The appliance includes an electric pump which is supplied with alternating current in order to convey a liquid through a conduit, and a heating element to raise the temperature of the liquid. The instantaneous value of the current I supplied to the pump is measured at regular time intervals. The method includes calculating the average value αof m current I measurements taken over a pre-determined time period T; comparing the average value αwith a reference value αcalculated as the average value of the current I measurements taken over an earlier period of the same length; and opening the pump's power supply circuit when the difference between the average values αand αexceeds a pre-determined threshold value Δfor at least two successive time periods T as a result of low average current indicative of dry running.