DIFF Subgroup
F04C 18/24 of counter-engagement type, i.e. the movement of co-operating members at the points of engagement being in opposite directions
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
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
IPC and CPC are identically structured here. All 2 subcodes exist in both systems.
IPC defines codes here since 1980.
Child Classifications
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