(19)
(11) EP 1 985 857 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
19.11.2008 Bulletin 2008/47

(43) Date of publication A2:
29.10.2008 Bulletin 2008/44

(21) Application number: 08251536.2

(22) Date of filing: 28.04.2008
(51) International Patent Classification (IPC): 
F04B 35/04(2006.01)
F04B 39/00(2006.01)
 F04B 49/06(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: 28.04.2007 CN 200710100946

(71) Applicant: Johnson Electric S.A.
2300 La Chaux-de-Fonds (CH)

(72) Inventors:
  • Liu, Bao Ting
    Tai Po, N.T. Hong Kong (HK)
  • Zhang, Guo Ji
    Tai Po, N.T. Hong Kong (HK)

(74) Representative: Hackett, Sean James 
Marks & Clerk 27 Imperial Square
Cheltenham Gloucestershire GL50 1RQ
Cheltenham Gloucestershire GL50 1RQ (GB)

   


(54) Solenoid pump


(57) A method of reducing or eliminating vibration in a linear reciprocating solenoid pump 10, the method comprising the steps of providing a solenoid pump 10 having a linear reciprocating plunger 14 and providing an electric circuit 48 to energize electro-motion means 16 of the solenoid pump 10, the electric circuit 48 energizing the electro-motion means 16 with an increased frequency of n times the frequency of normal mains electricity.







Search report