US 11,840,961 B2
Gas turbine engine fuel injector
Mark G. Goeddeke, West Olive, MI (US); and Michael Stratton, Zeeland, MI (US)
Assigned to Woodward, Inc., Fort Collins, CO (US)
Filed by Woodward, Inc., Fort Collins, CO (US)
Filed on Dec. 2, 2020, as Appl. No. 17/109,407.
Application 17/109,407 is a continuation of application No. 15/928,700, filed on Mar. 22, 2018, granted, now 10,865,714.
Prior Publication US 2021/0254551 A1, Aug. 19, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. F02C 7/22 (2006.01); F16L 11/22 (2006.01)
CPC F02C 7/222 (2013.01) [F16L 11/22 (2013.01); F05D 2220/32 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A fuel tube assembly for a gas turbine engine fuel injector, comprising:
an outer housing comprising an internal surface of the outer housing and having a uniform thickness; and
an elongated fuel tube affixed to said outer housing by a plurality of spaced apart joints and including an undulating tube outer surface along at least a portion of a length of the elongated fuel tube between said spaced apart joints, said undulating tube outer surface of the elongated fuel tube being in direct contact with the internal surface of the outer housing at one or more undulations of said undulating tube outer surface between said spaced apart joints, wherein the undulating tube outer surface comprises one or more of a pseudo-random, sinusoidal, or serpentine shape, and said undulating tube outer surface is also in direct contact with an outer surface of a second elongated fuel tube disposed inside said outer housing.