Reciprocating-piston machines or engines without rotary main shaft, e.g. of free-piston type

Introduced: September 1968

CPC subdivides this area 2x more granularly than IPC with 4 additional codes.

4 codes are CPC-only extensions.

Child Classifications

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F01B 11/001 +1 CPC CPC only CPC only
F01B 11/004 +2 CPC CPC only CPC only
F01B 11/007 +1 CPC CPC only CPC only
F01B 11/009 CPC only CPC only
F01B 11/02 Equalising or cushioning devices IPC+CPC Available in IPC and CPC
F01B 11/04 Engines combined with reciprocatory driven devices, e.g. hammers IPC+CPC Available in IPC and CPC
F01B 11/08 with direct fluid transmission link IPC+CPC Available in IPC and CPC