Patent ID: 7632073
Filing Date: 2009-12-15
Classification: B23P,F01D,F04D,F05D,Y10T

Abstract:
1. An impeller assembly for a fluid machine, the impeller assembly comprising: a first, main body having a central axis and including a first section providing at least a substantial portion of one of an impeller disc and an impeller cover, a second section spaced generally axially from the first section and providing a portion of the other one of the disc and the cover, and a plurality of integrally formed blades extending between and connecting the main body first and second sections such that the main body is generally of one piece construction, the main body defining an access opening through which the plurality of integrally formed blades can be machined; and a second body providing an entire remainder of the other one of the disc and the cover, the second body being attachable to the main body to substantially cover the access opening and to substantially form an impeller, wherein one of the main body first and second sections includes a cylindrical hub portion, the central axis of the main body extending centrally through the hub portion, and an annular portion extending substantially radially outwardly from the hub portion, and wherein the other one of the main body first and second sections includes a tubular portion disposed substantially coaxially about the hub portion and spaced apart substantially axially from the annular portion, the plurality of blades extending between and integrally connecting the tubular portion with the hub and annular portions.