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:
Aug. 13, 2024
Filed:
Dec. 15, 2017
Multitech Medical Devices Usa Llc, Holtsville, NY (US);
Lenny Novikov, Cliffside Park, NJ (US);
John William Weiss, Oakdale, NY (US);
Multitech Medical Devices USA LLC, Melville, NY (US);
Abstract
A safety circuit to disrupt power to a heating element of an appliance to be powered through a solid state switch (Tri-ac, Q), typically a triac, from an AC power source (V) having a positive half cycle and a negative half cycle delivering power. A low resistance condition is sensed by detecting either the current through or voltage across the solid state switch during the positive half cycle and the negative half cycle of the AC power line, when the solid state AC switch is not actuated. A fault signal is generated to interrupt power to the heating element, preferably by a crowbar circuit opening a fuse, whenever the low resistance condition is detected.