Patent ID: 7966832

Claim:
A combustor comprising: a forward end including a hot dome, a cold dome, and a channel defined between the hot dome and the cold dome, impingement holes formed in the cold dome and communicating with the channel to bring cooling air into the channel which impinges onto the hot dome; a combustion zone where combustion of a fuel-air mixture occurs, the combustion zone being at least partially enclosed by the hot dome; a connection assembly defining an injector opening through the hot dome and the cold dome and into the combustion zone, an fuel injector being positionable in the injector opening to bring fuel into the combustion zone, the connection assembly including an annular inner groove opening into the injector opening, and an annular outer groove with a diameter greater than the inner groove; at least one of the hot dome and the cold dome is indirectly connected to the connection assembly by a portion of the one of the hot dome and the cold dome being positioned in the outer groove with a sliding fit, and the other of the hot dome and the cold dome is directly connected to the connection assembly; and an injector grommet is indirectly connected to the connection assembly by a portion of the grommet being positioned in the inner groove with a sliding fit.