CPC Subgroup
F01B 11/04 Engines combined with reciprocatory driven devices, e.g. hammers
Full Title
Reciprocating-piston machines or engines without rotary main shaft, e.g. of free-piston type > Engines combined with reciprocatory driven devices, e.g. hammers
1 direct subcode
Child Classifications
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- F01B 11/06 for generating vibration only