Patent ID: 9677767
Date: 2017-06-13
CPC Classifications: F02C,F23R

Claim:
1. A combustion turbine combustor casing, comprising: a combustor housing having a figure eight-shaped sleeve wall planform that defines a pair of adjoin combustor portals sharing a common Siamesed portion of the sleeve wall; and a combustor portal mating surface formed on an axial distal end of the sleeve wall, having a figure eight planform and defining a first array of fastener receiving apertures that are adapted for retention of a pair of combustor top hat covers over an associated combustor portal, a top hat cover retention bracket assembly having a composite planform conforming to the combustor portal mating surface planform and a second array of apertures that conform to the first array pattern apertures, the retention bracket assembly adapted for placement over peripheral flanges of the pair of combustor top hat covers and passage of combustor top hat cover fasteners into corresponding first array pattern apertures, wherein the retention bracket assembly defining a step recess on bottom edges proximal to the combustor portal, adapted for capture of peripheral flanges of the pair of combustor top hat covers thereunder.