| 摘要 |
At least one ring (1,7) with internal teeth rotates in fixed bearings (5) and meshes with an eccentric pinion (3,9) rotating on a fixed shaft (19). The space diametrically opposed to the meshing region contains a fixed crescent-section filler member (15,16). A suction duct (27) connects to a point behind, and an outlet duct (28,29-31) to a point ahead of the respective meshing region. The inner toothed ring (1,7) is secured in a hollow, externally gear (4) with external teeth (4') which meshes with an external drive gear and/or with at least one other such gear containing a similar pump gear ring. An inlet connection and at least one outlet connection (31) are arranged in a housing (6,10,11) portion (12,13) coaxial with the ring axis.
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