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:
May. 01, 2012
Filed:
Jun. 03, 2010
William F. Raleigh, Bend, OR (US);
Robert A. Borgeson, O'Fallon, MO (US);
Aaron D. Herzon, Ballwin, MO (US);
Allan J. Reifel, Florissant, MO (US);
Russell W. Hoeffken, Millstadt, IL (US);
William F. Raleigh, Bend, OR (US);
Robert A. Borgeson, O'Fallon, MO (US);
Aaron D. Herzon, Ballwin, MO (US);
Allan J. Reifel, Florissant, MO (US);
Russell W. Hoeffken, Millstadt, IL (US);
Nordyne, LLC, O'Fallon, MO (US);
Abstract
Premix furnace for heating an occupied space while producing lower NOx emissions and methods of mixing air and fuel delivered to a premix burner and of improving combustion stability. A mixing device may be located within an inlet tube, may have a flat surface that is perpendicular to the direction of fuel flow, or may have two surfaces held at substantially opposite angles to induce swirl. A mixing device may be attached to the fuel injector, may be made from a piece of sheet metal, and may have bends and a hole for attachment to the fuel injector. A fluidic diode in the inlet tube may improve combustion stability and may include a hollow frustum or a frustoconical portion, a cylinder concentric with the inlet tube, or a combination thereof. Some embodiments include refractory insulation lining the combustion chamber or may adjust for elevation or fuel characteristics.