(19)
(11) EP 0 930 434 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
24.05.2000 Bulletin 2000/21

(43) Date of publication A2:
21.07.1999 Bulletin 1999/29

(21) Application number: 99100306.2

(22) Date of filing: 11.01.1999
(51) International Patent Classification (IPC)7: F04B 17/04, F04B 13/00
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 20.01.1998 JP 2281998

(71) Applicant: MIKUNIADEC CORPORATION
Iwate-gun, Iwate-ken 020-0173 (JP)

(72) Inventors:
  • Kenzi, Okada
    Morioka-shi, Iwateken 020-0127 (JP)
  • Koozi, Takasawa
    Morioka-shi, Iwateken 020-0127 (JP)
  • Tooru, Huzinuma
    Iwateken 028-3603 (JP)
  • Shin, Saito
    Morioka-shi, Iwateken 020-0141 (JP)
  • Katushi, Takami
    Morioka-shi, Iwateken 020-0122 (JP)

(74) Representative: HOFFMANN - EITLE 
Patent- und Rechtsanwälte Arabellastrasse 4
81925 München
81925 München (DE)

   


(54) Metering type electromagnetic pump


(57) It is sought to accurately control the discharge rate of a pump according to the frequency of a current pulse output applied to an electromagnetic coil.
The pump comprises an electromagnetic solenoid 13, a plunger 18 driven thereby, a check valve 2 disposed downstream the plunger 18 and driven by the electromagnetic solenoid 13, and an suction valve 17 provided in the plunger 18 and a discharge valve 8 provided in an inner yoke 6, the check valve 2 being opened when a current pulse output for energizing the electromagnetic solenoid 13 is turned on, thus causing a discharge stroke of the plunger 18.






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