DIFF Subgroup
F04C 18/28 of other than internal-axis type
Introduced: January 1980
Full Title
Full titles differ between systems:
IPC:
Rotary-piston pumps specially adapted for elastic fluids > of counter-engagement type, i.e. the movement of co-operating members at the points of engagement being in opposite directions > of other than internal-axis type
CPC:
Rotary-piston pumps specially adapted for elastic fluids (with fluid ring or the like F04C19/00; rotary-piston pumps in which the working-fluid is exclusively displaced by one or more reciprocating pistons F04B) > of counter-engagement type, i.e. the movement of co-operating members at the points of engagement being in opposite directions > of other than internal-axis type
No child classifications to compare. This is a leaf node in both IPC and CPC.