(19)
(11) EP 1 191 227 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
08.12.2004 Bulletin 2004/50

(43) Date of publication A2:
27.03.2002 Bulletin 2002/13

(21) Application number: 01402295.8

(22) Date of filing: 05.09.2001
(51) International Patent Classification (IPC)7: F04D 5/00, F04D 29/02
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 20.09.2000 JP 2000285182
02.07.2001 JP 2001200637

(71) Applicant: Mitsuba Corporation
Kiryu-shi, Gunma-ken (JP)

(72) Inventors:
  • Honma, Bunji
    Ohta-shi, Gunma-ken (JP)
  • Sadakata, Nobuyasu
    Isesaki-shi, Gunma-ken (JP)
  • Hasegawa, Kiyoshi
    Ohta-shi, Gunma-ken (JP)

(74) Representative: Hud, Robert et al
Cabinet COLLIGNON 15 rue de Surène
75008 Paris
75008 Paris (FR)

   


(54) Regenerative pump


(57) The light, cheap, and high-performance regenerative pump, for pumping a methanol-water fuel of a fuel cell, is adapted to the fuel. At least one of an impeller 1 of the regenerative pump and an inner wall 2 of the pump is made of polyphenylene sulfide or polyphenylene sulfide containing a filler, and a thrust clearancer formed between the pump chamber inner wall 2 and an impeller peripheral face is set so as to be assured even in a state where the impeller 1 swells.






Search report