Patent ID: 6422178
Filing Date: 2002-07-23
Classification: F23M,F24H

Abstract:
Fuel-fired heating apparatus comprising:a combustion chamber thermally communicatable with a fluid to be heated; a burner operatively disposed within said combustion chamber; and a flame arrestor plate structure having a generally planar body defining a wall portion of said combustion chamber and having a spaced series of louvered openings therein configured to permit combustion air to flow therethrough into said combustion chamber and substantially preclude flame passage outwardly therethrough from said combustion chamber, each of said louvered openings being bordered by a bounding portion of said body including first and second spaced apart body wall segments, each louvered opening having an inlet on a first side of said body, and an outlet disposed on a second side of said body and having an area substantially smaller than the area of said inlet, said first body wall segment being angled relative to the plane of said body and having a generally planar side surface and a first corner edge that partially bound the louvered opening, said second body wall segment having a generally planar end surface and a second corner edge that partially bound the louvered opening, said first and second corner edges extending along said outlet in a spaced apart, parallel relationship.