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:
Jul. 15, 2014
Filed:
Dec. 21, 2011
Applicants:
Harold Gene Havard, Terrell, TX (US);
Der-kai Hung, Dallas, TX (US);
Stephen A. Walter, Flower Mound, TX (US);
Inventors:
Harold Gene Havard, Terrell, TX (US);
Der-Kai Hung, Dallas, TX (US);
Stephen A. Walter, Flower Mound, TX (US);
Assignee:
Lennox Industries Inc., Richardson, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02K 7/14 (2006.01); H02P 3/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
An HVAC system includes a blower motor and a variable speed motor drive. The variable speed motor drive is configured to receive line power and provide modulated power to the motor. The blower motor is configured to produce airflow in response to the modulated power. A unit controller is configured to bypass the variable speed motor drive to provide the line power directly to the blower motor in the event that a measured airflow is less than a predetermined value.