| CPC F01D 9/065 (2013.01) [F01D 25/16 (2013.01); F01D 25/18 (2013.01); F01D 25/24 (2013.01); F01D 25/28 (2013.01); F05D 2220/323 (2013.01); F05D 2230/72 (2013.01); F05D 2250/232 (2013.01); F05D 2250/63 (2013.01); F05D 2260/31 (2013.01); F05D 2260/98 (2013.01)] | 18 Claims |
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1. A service tube assembly for an aircraft engine, comprising:
a service tube extending along a tube axis and having a threaded end portion and an outer shoulder adjacent to the threaded end portion, the outer shoulder having a frustoconical shoulder face converging towards the tube axis and away from the threaded end portion;
a mating part threadingly engaged by the threaded end portion of the service tube, the mating part having a seat face converging towards the service tube and towards the threaded end portion;
a locking member extending from a first end to a second end, the first end including a notch receiving the outer shoulder of the service tube, the notch circumscribed by a frustoconical notch face abutting the frustoconical shoulder face to create a frustoconical-to-frustoconical contact surface between the locking member and the outer shoulder of the service tube, the second end in abutment against the seat face of the mating part; and
a mechanical fastener releasably holding the locking member in abutment against both of the outer shoulder of the service tube and the mating part.
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