(19)
(11) EP 1 961 965 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
31.03.2010 Bulletin 2010/13

(43) Date of publication A2:
27.08.2008 Bulletin 2008/35

(21) Application number: 08151673.4

(22) Date of filing: 20.02.2008
(51) International Patent Classification (IPC): 
F04D 29/24(2006.01)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR
Designated Extension States:
AL BA MK RS

(30) Priority: 21.02.2007 IT MI20070329

(71) Applicant: Melzi, Eriberto
20047 Brugherio (MI) (IT)

(72) Inventor:
  • Melzi, Eriberto
    20047 Brugherio (MI) (IT)

(74) Representative: Martegani, Franco 
Patent Attorney, Via Carlo Alberto, 41
20052 Monza (Milano)
20052 Monza (Milano) (IT)

   


(54) Vortex impeller for centrifugal fluid-dynamic pumps


(57) Vortex impeller (10) for centrifugal fluid-dynamic pumps, provided with a central eye (16), an outer circumferential edge (18) and a plurality of blades (12, 12') having respective starting points (14, 14') arranged at said eye (16) of the impeller (10), each pair of contiguous blades (12, 12') defining a channel (22) arranged between them, characterised in that each of said blades (12, 12') has a profile in plan consisting of a plurality of arcs of circumference (24, 24', 24'') arranged in sequence and joined together, pairs of consecutive arcs of circumference (24, 24'; 24', 24'') having different bending radii.







Search report