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Title:
MULTISTAGE OIL PUMP
Document Type and Number:
Japanese Patent JP2013238210
Kind Code:
A
Abstract:

To provide a multistage oil pump capable of being used even when a pressure and temperature are high by housing a rotor case in a housing, since conventional oil pumps cannot be used when the pressure and the temperature are high.

In an oil pump, two rotors 6, 7 are connected in series in a rotary shaft direction. The rotors 6, 7 are each housed separately with a spacer 5 therebetween within a rotor case 4, wherein the interior of the rotor case is partitioned by mean of the spacer 5. The rotor case 4 forms a cylindrical shape, and the spacer 5 is integral with the rotor case 4. The rotors 6, 7 and the rotor case 4 are iron-based, and are fixed to a housing 2 by means of positioning pins.


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Inventors:
KUMAMOTO MASATO
CHIBA TOMOAKI
NAIKI NAGAHIKO
Application Number:
JP2012113481A
Publication Date:
November 28, 2013
Filing Date:
May 17, 2012
Export Citation:
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Assignee:
MIKUNI KOGYO KK
International Classes:
F04C15/00; F04C2/10; F04C11/00
Domestic Patent References:
JPH1122656A1999-01-26
JPH07167066A1995-07-04
JP2011132807A2011-07-07
JPH10252674A1998-09-22
Attorney, Agent or Firm:
Shiroyuki Hori



 
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