Patent ID: 9513011
Filing Date: 2016-12-06
CPC Classification: F23R,Y10T

Claim Text:
1. A gas turbine engine combustor top hat cover attachment system, comprising: a combustor section midframe defining a combustor portal; a combustor portal mating surface circumscribing an outwardly exposed periphery of the combustor portal, the mating surface defining an array of projecting tabs that are separated by lug recesses; a lug raceway defined within the combustor portal mating surface beneath the projecting tabs that is in communication with the lug recesses; a first array pattern of through hole apertures defined in the combustor portal mating surface that correspond to an array pattern of combustor top hat cover fastener apertures; and a backing plate having a ring, including a plurality of projecting ring lugs, that is adapted for interlocking engagement with the combustor portal mating surface by insertion of the ring lugs into the lug recesses and rotation of the ring lugs in the lug raceway under the projecting tabs, the backing plate defining a second array pattern of threaded apertures that correspond to an array pattern of top hat cover fastener apertures, the second array of threaded apertures adapted for coaxial alignment with the first array corresponding through hole apertures and capture of top hat cover fasteners.