(19)
(11) EP 1 277 960 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
05.11.2003 Bulletin 2003/45

(43) Date of publication A2:
22.01.2003 Bulletin 2003/04

(21) Application number: 02015858.0

(22) Date of filing: 16.07.2002
(51) International Patent Classification (IPC)7: F04C 2/10, F04C 15/00, F04C 15/04
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 17.07.2001 IT BO20010452

(71) Applicant: Pierburg S.p.A.
66034 Lanciano (IT)

(72) Inventors:
  • Pachetti, Carlo
    56121 Pisa (IT)
  • Armenio, Giacomo
    57128 Livorno (IT)
  • Righetti, Daniele
    57128 Livorno (IT)

(74) Representative: Franzolin, Luigi et al
STUDIO TORTA S.r.l., Via Viotti, 9
10121 Torino
10121 Torino (IT)

   


(54) Variable-delivery pump


(57) A variable-delivery pump (10) for a fluid, having at least one pumping stage (11a, 11b) in turn having at least one rotor (20) rotated by a drive shaft (17) ; the pump (10) being characterized in that a clutch device (25) is interposed between the drive shaft (17) and the rotor (20) to make the rotor (20) integral with or idle with respect to the drive shaft (17) to adapt the physical characteristics of the fluid to the demands of a user device.






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