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Title:
COMBINED GEAR PUMP
Document Type and Number:
Japanese Patent JP3760297
Kind Code:
B2
Abstract:

PROBLEM TO BE SOLVED: To provide a combined gear pump with a first gear pump and a second gear pump, in which hydraulic oils of different properties can be treated without mixing.
SOLUTION: A first internal gear pump 1 is constituted by accommodating a ring-shaped first gear member 7 and a second gear member 9 in a recess 4 of a pump housing 3. A second gear pump 2 is constituted of the first gear member 7 and a third gear member 11 which is provided with external teeth 10 to be engaged with external teeth 6 of the first gear member 7. A first intake port 14 and a first discharge port 15 for the first gear pump 1 are opened, and a second intake port 16 and a second discharge port 17 for the second gear pump 2 are opened, to the recess 4 of pump housing 3. In the recess 4, covering the outer periphery of the first gear member 7, a partition member 30 is provided such that communication between the first intake port 14 and the first discharge port 15 for the external teeth 6 of the first gear member 7 and the first gear pump 1.


Inventors:
Morita, Shoji
Application Number:
JP1998000214181
Publication Date:
March 29, 2006
Filing Date:
July 29, 1998
Export Citation:
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Assignee:
UNISIA JECS CORP
International Classes:
F04C2/10; F04C2/18; F04C11/00; (IPC1-7): F04C2/18; F04C2/10; F04C11/00
Domestic Patent References:
JP6346690U
JP6220682A
JP50114705U
Foreign References:
GB1234889B
Attorney, Agent or Firm:
青木 輝夫