DIFF Subgroup
F04B 47/12 having free plunger lifting the fluid to the surface
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps > having free plunger lifting the fluid to the surface
CPC:
Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps (by using positive or negative pressurised fluid medium acting directly on the liquid to be pumped F04F1/00) > having free plunger lifting the fluid to the surface
No child classifications to compare. This is a leaf node in both IPC and CPC.