(19)
(11) EP 1 477 664 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
04.05.2005 Bulletin 2005/18

(43) Date of publication A2:
17.11.2004 Bulletin 2004/47

(21) Application number: 04010792.2

(22) Date of filing: 06.05.2004
(51) International Patent Classification (IPC)7: F02M 37/04, F02M 37/08, F02M 37/10
(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 PL PT RO SE SI SK TR
Designated Extension States:
AL HR LT LV MK

(30) Priority: 09.05.2003 JP 2003132311
02.09.2003 JP 2003310294
19.12.2003 JP 2003423587

(71) Applicant: KABUSHIKI KAISHA TOYODA JIDOSHOKKI SEISAKUSHO
Kariya-shi, Aichi-ken (JP)

(72) Inventors:
  • Suzuki, Shigeru
    2-1, Toyoda-cho Kariya-shi Aichi-ken (JP)
  • Fujii, Toshiro
    2-1, Toyoda-cho Kariya-shi Aichi-ken (JP)

(74) Representative: Böckelen, Rainer 
Tiedtke-Bühling-Kinne & Partner (GbR), TBK-Patent Bavariaring 4
80336 München
80336 München (DE)

   


(54) Electric pump


(57) An electric pump (2) draws and discharges fluid. When the fluid receives heat from the pump (2), the fluid has a saturation vapor pressure that can surpass the pressure of fluid that is drawn into the pump (2) and is lower than the pressure of fluid discharged from the pump (2). The pump (2) includes an electric motor; a pump section that is driven by the electric motor (M) to draw, pressurize, and discharge the fluid; and a housing (6) for accommodating the pump section. The housing (6) defines a motor chamber (156) that accommodates the electric motor (M). The pressure in the motor chamber (152) is equal to the pressure of fluid that is discharged from the pump section. Therefore, the pump (2) prevents fluid in the motor chamber (152) from vaporizing.






Search report