DIFF Subgroup
F04D 29/28 for centrifugal or helico-centrifugal pumps
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Details, component parts, or accessories > Rotors specially adapted for elastic fluids > for centrifugal or helico-centrifugal pumps
CPC:
Details, component parts, or accessories (machine elements in general F16) > Rotors specially for elastic fluids > for centrifugal or helico-centrifugal pumps
CPC subdivides this area 6x more granularly than IPC with 5 additional codes.
5 codes are CPC-only extensions.
Child Classifications
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