Reciprocating-piston liquid engines

Introduced: September 1968

Of 14 combined children, 6 exist in both systems.

3 codes are CPC-only extensions, 5 exist only in IPC.

2 shared codes have differing titles between IPC and CPC.

Child Classifications

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F03C 1/001 CPC only CPC only
F03C 1/002 CPC only CPC only
F03C 1/003 +2 CPC CPC only CPC only
F03C 1/007 with single cylinder, double-acting piston since 1990 +1 CPC IPC+CPC Available in IPC and CPC
F03C 1/013 with single cylinder, single-acting piston since 1990 +1 CPC IPC+CPC Available in IPC and CPC
F03C 1/02 with multiple-cylinders, characterised by the number or arrangement of cylinders (with movable cylinders F03C1/22; of flexible-wall type F03C7/00) IPC+CPC Available in IPC and CPC
F03C 1/08 Distributing valve-gear peculiar thereto (for engines with positive-displacement in general F01L; ) IPC+CPC Available in IPC and CPC
F03C 1/22 with movable cylinders +1 CPC IPC+CPC Available in IPC and CPC
F03C 1/26 adapted for special use or combined with apparatus driven thereby IPC+CPC Available in IPC and CPC
F03C 1/28 Pistons specially adapted therefor since 1990 IPC only IPC only
F03C 1/3 Cams specially adapted therefor since 1990 IPC only IPC only
F03C 1/32 Cylinders specially adapted therefor since 1990 IPC only IPC only
F03C 1/34 Distribution members specially adapted for multiple-cylinder engines since 1990 −2 IPC IPC only IPC only
F03C 1/4 Control specially adapted therefor since 1990 IPC only IPC only

Class F03,2013–2023, worldwide · Source: EPO PATSTAT

Class F03,2013–2023, worldwide · Source: EPO PATSTAT