| 摘要 |
The present invention provides an apparatus, method and system for producing water flow within a pool or spa. A pump body contains a pump assembly with an impeller for aspirating water. A driving device connects to the impeller. A jet nozzle, which may be pivotable, directs water out of the pump. A front cover comprises a water intake inlet distal from ajet nozzle front cover opening. The front cover water intake inlet may be positioned to allow water flow into the apparatus substantially in a direction normal to water flow out of the apparatus. Impeller vanes may have angled front-side vane edges. Vanes may thicken with distance from the impeller center. A radius of curvature for an inside impeller vane surface may be less than a radius of curvature for an outside impeller vane surface. A radius of curvature for impeller vanes may decrease away from the impeller center.
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