Multi-cylinder machines or pumps characterised by number or arrangement of cylinders (machines or pumps with pistons coacting within one cylinder F04B3/00)

Introduced: September 1968

Title

Titles differ between systems:

IPC: Multi-cylinder machines or pumps characterised by number or arrangement of cylinders

CPC: Multi-cylinder machines or pumps characterised by number or arrangement of cylinders (machines or pumps with pistons coacting within one cylinder F04B3/00)

Full Title

Full titles differ between systems:

IPC:

Multi-cylinder machines or pumps characterised by number or arrangement of cylinders

CPC:

Multi-cylinder machines or pumps characterised by number or arrangement of cylinders (machines or pumps with pistons coacting within one cylinder F04B3/00)

Of 6 combined children, 5 exist in both systems.

1 codes are CPC-only extensions.

2 shared codes have differing titles between IPC and CPC.

Child Classifications

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F04B 1/005 CPC only CPC only
F04B 1/02 having two cylinders (in V-arrangement F04B1/04) IPC+CPC Available in IPC and CPC
F04B 1/03 with cylinder axis arranged substantially tangentially to a circle centred on main shaft axis since 2020 IPC+CPC Available in IPC and CPC
F04B 1/04 having cylinders in star- or fan-arrangement IPC+CPC Available in IPC and CPC
F04B 1/12 having cylinder axes coaxial with, or parallel or inclined to, main shaft axis IPC+CPC Available in IPC and CPC
F04B 1/34 Control not provided for in groups F04B1/02, F04B1/03, F04B1/06 or F04B1/26 since 1995 IPC+CPC Available in IPC and CPC