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Title:
INTERNAL GEAR TYPE PUMP WITH BUILT-IN MOTOR AND ELECTRONIC DEVICE
Document Type and Number:
WIPO Patent Application WO/2007/004503
Kind Code:
A1
Abstract:
An internal gear type pump (80) with a built-in motor, comprising a pump part (81) sucking and discharging a working fluid and a motor part (82) driving the pump part (81). The pump part (81) comprises an inner rotor (1) having gears formed on the outer periphery thereof, an outer rotor (2) having gears meshing with the gears of the inner rotor (1) formed on the inner periphery thereof, and pump casings (3) and (4) storing the inner rotor (1) and the outer rotor (2). The motor part (82) comprises a rotor (11) and a stator (12) rotating the rotor (11). The rotor (11) and the outer rotor (2) are formed to share a permanent magnet member (112) formed of a resin containing a magnet powder. Thus, the internal gear type pump can be manufactured at low cost and with high reliability while maintaining a reduced size and cost.

Inventors:
NAKANISHI MASATO (JP)
KAMEYA HIROTAKA (JP)
YANAGASE YUUICHI (JP)
SATO EIJI (JP)
AIZAWA KOUJI (JP)
Application Number:
PCT/JP2006/312975
Publication Date:
January 11, 2007
Filing Date:
June 29, 2006
Export Citation:
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Assignee:
HITACHI LTD (JP)
TAIWAN HITACHI CO LTD
NAKANISHI MASATO (JP)
KAMEYA HIROTAKA (JP)
YANAGASE YUUICHI (JP)
SATO EIJI (JP)
AIZAWA KOUJI (JP)
International Classes:
F04C2/10; F04C13/00; F04C15/00
Foreign References:
JPH0323679U1991-03-12
JP2005098268A2005-04-14
JP2004336831A2004-11-25
JP2002159165A2002-05-31
JP2001142573A2001-05-25
JPH01147177A1989-06-08
JP2001165061A2001-06-19
JP2004047843A2004-02-12
JP2004011514A2004-01-15
Attorney, Agent or Firm:
NITTO INTERNATIONAL PATENT OFFICE P.P.C. (3-3 Shinkawa 1-chom, Chuo-ku Tokyo, JP)
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