(19)
(11) EP 1 431 583 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
27.07.2005 Bulletin 2005/30

(43) Date of publication A2:
23.06.2004 Bulletin 2004/26

(21) Application number: 03027457.5

(22) Date of filing: 01.12.2003
(51) International Patent Classification (IPC)7: F04D 15/00, F04B 49/06
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR
Designated Extension States:
AL LT LV MK

(30) Priority: 20.12.2002 IT PD20020330

(71) Applicant: Dab Pumps S.p.A.
35035 Mestrino (Padova) (IT)

(72) Inventors:
  • Bedin, Dario
    36066 Sandrigo (Prov. of Vicenza) (IT)
  • Franchetti, Bruno
    36040 Brendola (Prov. of Vicenza) (IT)
  • Cegalin, Ruby
    36051 Creazzo (Prov. of Vicenza) (IT)

(74) Representative: Modiano, Guido, Dr.-Ing. et al
Modiano & Associati, Via Meravigli, 16
20123 Milano
20123 Milano (IT)

   


(54) Device for actuating electric pumps in liquid distribution systems


(57) A device for actuating electric pumps for water distribution systems, comprising a hollow hydraulic body (10), to be associated with an electric pump (11) with a single-phase electric motor, which forms internally a main duct (18) with end connectors (19, 20) for connection to the hydraulic system, the main duct (18) containing a flow-controlled switch (21), which cooperates with a pressure sensor (29) that is associated with the body (10) and is coupled to an electronic pressure reduction unit that operates by reducing the rotation rate of the motor according to a voltage variation chosen between one produced in the main winding and one in the electrical power supply line.






Search report