Patent ID: 7156612

Claim:
A split impeller assembly for a gas turbine engine, the split impeller having inducer and exducer bodies matingly mounted to one another at respective rear and front faces, the split impeller assembly further comprising: a central recess co-axially defined in the front face of the exducer body, the recess having an inwardly extending radial surface spaced apart from the front face; and an annular spigot protruding axially from of the rear face of the inducer body, the spigot being received in the recess, the spigot having a terminal radial surface spaced apart from the rear face, in order to contact the inwardly extending radial surface of the recess of the exducer body such that the rear face of the inducer body and the front face of the exducer body are spaced apart to form a gap therebetween.