| 摘要 |
PROBLEM TO BE SOLVED: To provide an internal gear pump for reducing complexity on the clearance control between a housing and an outer rotor. SOLUTION: This internal gear pump 1 has a first port and a second port symmetrically arranged to the first axis for connecting a shutting-in part having the maximum volume and a meshing part having the minimum volume among a plurality of pump rooms formed between an internal teeth gear of the outer rotor 30 and an external teeth gear of an inner rotor 40 and opening in a plurality of these pump rooms. Radial directional clearance formed between an outer rotor storage part and the outer rotor, is arranged so that the second axis direction respectively orthogonal to this first axis and a driving shaft becomes smaller than the first axis direction. COPYRIGHT: (C)2007,JPO&INPIT
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