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F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
F04D—NON-POSITIVE-DISPLACEMENT PUMPS
F04D3/00—Axial-flow pumps
F04D3/02—Axial-flow pumps of screw type
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FR687654D1930-01-031930-01-03Pompe à vis d'archimède destinèe à l'élévation des liquides visqueux tels que goudrons, huiles, savons, etc.
ExpiredFR687654A
(fr)