Patent classifications
F
MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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F04
POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
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F04D
NON-POSITIVE-DISPLACEMENT PUMPS
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29/00
Details, component parts, or accessories
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F04D29/40
Casings; Connections of working fluid
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F04D29/42
for radial or helico-centrifugal pumps
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F04D29/44
Fluid-guiding means, e.g. diffusers
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F04D29/441
especially adapted for elastic fluid pumps
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F04D29/442
rotating diffusers
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