The variable emission quantitative feather type pump for oil emission, the rotor (9) eccentricity doing around, the stator which is installed (10) we have, the rotor (9), in order to turn the longitudinal axis (6) as a center, as it is arranged, the plural grooves which open to the direction outside diameter direction (15) we have possessed. Each groove (15), the feather which corresponds (17) has engaged sliding possibly. The feather (17) with the stator (10) between, the longitudinal axis (6) extending at least around over the range of the angle which is smaller than the 360 one which is present slide member (19; 27) by the fact that it lies between, the feather (17) the stator (10) is arranged in contact state. Selective figure Figure 2
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