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:
Nov. 04, 2014
Filed:
Jul. 12, 2010
Floyd E. Cherington, Carrollton, TX (US);
Shailesh S. Manohar, Coppell, TX (US);
Hans J. Paller, Double Oak, TX (US);
John W. Whitesitt, Garland, TX (US);
Floyd E. Cherington, Carrollton, TX (US);
Shailesh S. Manohar, Coppell, TX (US);
Hans J. Paller, Double Oak, TX (US);
John W. Whitesitt, Garland, TX (US);
Lennox Industries, Inc., Richardson, TX (US);
Abstract
A furnace unit that comprises a burner assembly having at least one burner located therein and a heat exchanger having at least one continuous combustion tube. One end of the combustion tube has a first opening that is coupled to the burner assembly. The combustion tube has at least three zones. A first surface of the first zone has a first non-straight angle with a second surface of the second zone. The second surface has a second non-straight angle with a third surface of the third zone. The first zone is nearest of the three zones to the burner assembly and the second zone is in-between the first zone and the third zone. The first, second and third zones are within a flame length configured to be emitted from the burner.