| 摘要 |
A ribbed impeller for use in a water pump and in marine water pumps in particular, which ribbed impeller is characterized by a hub rotatably mounted on a shaft positioned inside the pump barrel or housing and multiple blades provided on the hub and fitted with ribs of varying location, length, size and character for enhancing the pumping of water through the barrel. In a preferred embodiment the hub is characterized by an open end which tapers inwardly to define a shaft mount end, to which the shaft is attached for rotation of the ribbed impeller. In another preferred embodiment of the invention the pitch of the impeller blades vary proportionally with the diameter of the pump barrel or housing for optimum pumping of the water through the barrel.
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