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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F04B
POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
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15/00
Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts
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F04B15/02
the fluids being viscous or non-homogeneous
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F04B15/023
supply of fluid to the pump by gravity through a hopper, e.g. without intake valve
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