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. 25, 2020
Filed:
Dec. 11, 2017
Applicant:
Lennox Industries Inc., Richardson, TX (US);
Inventors:
Leonor Beakley, Plano, TX (US);
Leonard J. Cook, Lewisville, TX (US);
David Chilson, Lewisville, TX (US);
Assignee:
Lennox Industries Inc., Richardson, TX (US);
Primary Examiner:
Int. Cl.
CPC ...
F23M 20/00 (2014.01); F24D 5/04 (2006.01); F23J 13/00 (2006.01);
U.S. Cl.
CPC ...
F23M 20/005 (2015.01); F23J 13/00 (2013.01); F24D 5/04 (2013.01); F23J 2900/13003 (2013.01);
Abstract
A sound level reducing apparatus and method for reducing the outdoor sound level produced by a high efficiency gas furnace. The apparatus comprising a muffler having an internal length determined by an identified target pure tone frequency producing an undesirable sound level. The internal length may be optimized to reduce the sound level across a range of operational frequencies.