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. 18, 2020
Filed:
Aug. 04, 2017
Lennox Industries Inc., Richardson, TX (US);
Palanivel Subramaniam, Richardson, TX (US);
Austin Clay Styer, Plano, TX (US);
Lennox Industries Inc., Richardson, TX (US);
Abstract
An apparatus includes a blower drive and a protection circuit. The blower drive includes a processor and a capacitor. The capacitor is electrically coupled to the processor and provides electrical power to the processor during a short circuit in the blower drive. The protection circuit is electrically coupled to the blower drive and includes a first switch, a positive temperature coefficient resistor, and a second switch. The positive temperature coefficient resistor is electrically coupled in series to the first switch. The second switch is electrically coupled in parallel to the positive temperature coefficient resistor and opens during the short circuit in the blower drive. The first switch opens after the second switch opens and after a short circuit current is below a threshold.