US 9,810,230 B2
Impeller for a turbomachine and method for attaching a shroud to an impeller
Iacopo Giovannetti, Florence (IT); Massimo Giannozzi, Florence (IT); Dino Bianchi, Florence (IT); Leonardo Tognarelli, Florence (IT); Manuele Bigi, Florence (IT); and Andrea Massini, Florence (IT)
Filed by Nuovo Pignone SrL, Florence (IT)
Filed on Mar. 10, 2015, as Appl. No. 14/642,844.
Application 14/642,844 is a continuation of application No. 13/319,493, granted, now 8,998,581, previously published as PCT/EP2010/056289, filed on May 7, 2010.
Claims priority of application No. MI2009A0781 (IT), filed on May 8, 2009.
Prior Publication US 2015/0322960 A1, Nov. 12, 2015
This patent is subject to a terminal disclaimer.
Int. Cl. F04D 17/10 (2006.01); F04D 29/28 (2006.01); F04D 29/42 (2006.01); F04D 29/62 (2006.01); F04D 29/02 (2006.01); F04D 29/22 (2006.01)
CPC F04D 29/023 (2013.01) [F04D 17/10 (2013.01); F04D 29/2227 (2013.01); F04D 29/284 (2013.01); F04D 29/4206 (2013.01); F04D 29/624 (2013.01); F05D 2230/23 (2013.01); F05D 2300/20 (2013.01); F05D 2300/43 (2013.01); Y10T 29/49325 (2015.01); Y10T 29/49329 (2015.01); Y10T 29/49336 (2015.01); Y10T 29/49337 (2015.01)] 40 Claims
OG exemplary drawing
 
1. An impeller for a turbo-machine, the impeller comprising:
a metallic base having a back surface and a front surface opposite to the back surface;
at least one blade extending on the front surface of the metallic base;
a composite shroud attached to the at least one blade such that plural closed paths are formed by the front surface of the metallic base, the at least one blade and the composite shroud; and
a connector configured to attach the composite shroud to the metallic base or the at least one blade.