CPC 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
Full Title
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
2 direct subcodes
Child Classifications
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- F04C 18/26 of internal-axis type
- F04C 18/28 of other than internal-axis type