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Title:
COMPOSITE TYPE GEAR PUMP AND HYDRAULIC CIRCUIT OF ENGINE THEREWITH
Document Type and Number:
Japanese Patent JP3712817
Kind Code:
B2
Abstract:

PROBLEM TO BE SOLVED: To provide a composite type gear pump that is easy to set up the optimum specifications of an external gear pump, and beside, there is no fear of abrasion and seizure happening.
SOLUTION: This composite type gear pump is so constituted hat an external gear 26 is installed in an outer boundary of an outer rotor 24 of an internal gear pump equipped with both inner and outer rotors 22 and 24, and an external gear pump is constituted by a separate rotor 30 with an external gear 31 being circumscribed with the external gear 26. In this case, the external gear 26 on the outer boundary of the outer rotor 24 is provided with a guide surface 27 being adjacently installed in the axial direction, and slidingly contacting with the inner wall of a casing 40.


Inventors:
Morita, Shoji
Application Number:
JP1997000076119
Publication Date:
November 02, 2005
Filing Date:
March 27, 1997
Export Citation:
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Assignee:
UNISIA JECS CORP
International Classes:
F01M1/16; F01L1/344; F02D13/02; F04C2/10; F04C11/00; (IPC1-7): F04C2/10; F01M1/16; F02D13/02
Domestic Patent References:
JP4175431A
JP3213630A
JP311043B1
JP730304U
JP482207A
Foreign References:
GB1234889B
Attorney, Agent or Firm:
阿部 和夫