Patent ID: 7854121
Filing Date: 2010-12-21
Classification: F23C,F23D,F23L,F23R

Abstract:
1. A fuel nozzle comprising: a base portion having a first chamber, a second chamber, a third chamber and a fourth chamber; a first tube engaging the base portion; a second tube having a flange portion engaging the base portion, the second tube disposed concentrically about the first tube; a third tube having a flange portion engaging the base portion, the third tube disposed concentrically about the second tube; a fourth tube engaging the base portion, the fourth disposed concentrically about the third tube; a first passage defined by an outer surface of the first tube and an inner diameter of the second tube, the first passage communicative with the first chamber and a first introduction port located at the distal end of the fuel nozzle; a second passage defined by an outer surface of the second tube and an inner diameter of the third tube, the second passage communicative with the second chamber and a plurality of second introduction ports disposed radially about the fuel nozzle; a third passage defined by an inner diameter of the first tube, the third passage communicative with the third chamber and a third introduction port located at a distal end of the fuel nozzle; a fourth passage defined by an outer surface of the third tube and an inner diameter of the fourth tube, the fourth passage communicative with the fourth chamber and a distal end of the fuel nozzle, wherein the distal end is opposite the fourth chamber; and a first lip seal disposed concentrically around the second tube and engaging the base portion, the first lip seal including a ring portion having a planar surface and a flange portion extending from the planar surface, the flange portion contacting the second tube, the first lip seal operative to prevent leakage between the second passage and the first passage.