F
MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
F04
POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
F04D
NON-POSITIVE-DISPLACEMENT PUMPS
F04D29/00
Details, component parts, or accessories
F04D29/40
Casings; Connections of working fluid
F04D29/52
for axial pumps
F04D29/522
especially adapted for elastic fluid pumps