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:
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
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.