Fluid reaction surfaces (i.e. – impellers) – Spiral blade or flow passage – Flow confining casing – shroud or passage
Reexamination Certificate
2005-01-04
2005-01-04
Nguyen, Ninh H. (Department: 3745)
Fluid reaction surfaces (i.e., impellers)
Spiral blade or flow passage
Flow confining casing, shroud or passage
Reexamination Certificate
active
06837684
ABSTRACT:
An impeller for a pump used for pumping liquid substances, such as waste water, said impeller containing at least one flow channel of a spatially curved shape, wherein the flow channel is of an evenly curved shape and, in the final portion of the channel, the flow channel meets itself, or another channel if the impeller has more than one flow channel. By using the impeller of the invention, a very high efficiency is achieved.
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Grundfos Management A/S
Nguyen Ninh H.
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