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. 06, 1980
Filed:
Jan. 03, 1978
Temple S Voorheis, Atherton, CA (US);
Coen Company, Inc., Burlingame, CA (US);
Abstract
A flame forming burner for simultaneously minimizing excess air consumption while suppressing NO.sub.x emissions. A dual zone air register is provided to supply primary air in substoichiometric quantity into mixture with fuel to produce a flame in a primary zone. Additional air is introduced around the flame and downstream of the initial combustion site in a secondary zone, in sufficient quantity to complete combustion. In the preferred embodiment, primary air is provided through a venturi throat, and secondary air is provided through an annular passage equipped with vanes which generate dual counter-rotating (DCR) air flow surrounding the primary zone. Dampers for each register control the primary to secondary air ratio. Preferably, a divergent, non-circular throat provides flame shaping.