| 摘要 |
An impeller for preventing air-lock in a pump, the impeller in its basic embodiment includes a top plate, the top plate having a center axis and a peripheral edge, a plurality of vanes, each vane attached to the top plate, at least one small protrusion projecting from the periphery of the top plate, and at least one ventilation channel having an outlet located near the protrusion, and an inlet located near the center axis of the top plate. The present invention also contemplates a centrifuge pump and an aerator device having the impeller of the present invention.
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