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PCE
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DIFF Subgroup
F04C 18/20

with dissimilar tooth forms (F04C18/16 takes precedence)

Introduced: January 1980

Title

Titles differ between systems:

IPC: with dissimilar tooth forms

CPC: with dissimilar tooth forms (F04C18/16 takes precedence)

Full Title

Full titles differ between systems:

IPC:

Rotary-piston pumps specially adapted for elastic fluids > of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing > of other than internal-axis type > with toothed rotary pistons > with dissimilar tooth forms

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 intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing > of other than internal-axis type > with toothed rotary pistons > with dissimilar tooth forms (F04C18/16 takes precedence)

No child classifications to compare. This is a leaf node in both IPC and CPC.