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PCE
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DIFF Subgroup
F04B 1/18

having self-acting distribution members, i.e. actuated by working fluid

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Multi-cylinder machines or pumps characterised by number or arrangement of cylinders > having cylinder axes coaxial with, or parallel or inclined to, main shaft axis > having stationary cylinders > having self-acting distribution members, i.e. actuated by working fluid

CPC:

Multi-cylinder machines or pumps characterised by number or arrangement of cylinders (machines or pumps with pistons coacting within one cylinder F04B3/00) > having cylinder axes coaxial with, or parallel or inclined to, main shaft axis > having stationary cylinders > having self-acting distribution members, i.e. actuated by working fluid

IPC and CPC are identically structured here. All 4 subcodes exist in both systems.

IPC defines codes here since 2020.

Child Classifications

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  • F04B 1/182 Check valves since 2020 IPC+CPC Available in IPC and CPC
  • F04B 1/184 Cylindrical distribution members since 2020 IPC+CPC Available in IPC and CPC
  • F04B 1/186 Conical distribution members since 2020 IPC+CPC Available in IPC and CPC
  • F04B 1/188 Plate-like distribution members since 2020 IPC+CPC Available in IPC and CPC