Patent ID: 7849821
Filing Date: 2010-12-14
Classification: F23D,F23N,F24H

Abstract:
1. Fuel-fired heating apparatus comprising: a first burner having a body through which fuel may be flowed for combustion with air to create a flame emanating from said first burner; a second burner disposed externally of said first burner; and a fuel line structure through which fuel may be flowed to said second burner, said fuel line structure having a portion which is openable, in response to a portion of said body of said first burner reaching a predetermined temperature elevated above a normal firing temperature indicative of a flame flashback condition in said first burner, to permit fuel flowing through said fuel line structure to escape therefrom before reaching said second burner, said fuel line structure being disposed entirely external to said first burner said portion of said fuel line structure is positioned to receive heat from said portion of said body of said first burner and is meltable thereby when the temperature of said portion of said body of said first burner reaches said predetermined elevated temperature indicative of a flame flashback condition in said first burner; said fuel line structure includes a fuel supply conduit; said meltable portion of said fuel line structure is a longitudinal portion of said fuel supply conduit; and said longitudinal portion of said fuel supply conduit is in direct external contact with said body of said first burner.