Patent ID: 7717703
Filing Date: 2010-05-18
Classification: B05B,C23C

Abstract:
1. A combustion head for use with a flame spray apparatus having a combustion chamber from which pressurized combustion gases are discharged, and a nozzle from which coating materials heated by the combustion gases are projected, the combustion head comprising: a body portion defining a combustion opening for receiving an outlet end of the combustion chamber, the body portion further defining an interior chamber extending along an axis from the combustion opening into the body portion, the axis of the combustion chamber being oriented substantially perpendicular to a longitudinal axis of the body portion, a material feed conduit extending through said body portion along the longitudinal axis thereof, the material feed conduit having an inlet and an outlet defined by first and second opposed ends of the body portion respectively, the interior chamber extending into the body portion on opposing sides of the material feed conduit, wherein the interior chamber is defined in part by arcuate sidewalls extending from the combustion opening into the body portion beyond the material feed conduit, a plurality of cooling channels defined by an outer surface of the body portion and extending through the length thereof, wherein the cooling channels are spaced radially about the longitudinal axis of the body portion, each of the cooling channels having a varying depth along the length thereof defining an arc corresponding to the arcuate sidewalls of the interior chamber such that the sidewalls of the body portion formed between the interior chamber and the plurality of cooling channels are substantially uniform in wall thickness adjacent the interior chamber, and a plurality of combustion gas conduits extending from the interior chamber through the second end of the body portion and arranged about the material feed conduit.