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Valves controlled by impact by piston, e.g. in free-piston machines

Valves controlled by impact by piston, e.g. in free-piston machines · Cooperative Patent Classification (CPC)

Engines, pumps, lighting, heating, and mechanical systems.

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CPC classification statistics
Metric	Value
CPC code	F01L23/00
Official title	Valves controlled by impact by piston, e.g. in free-piston machines
Display label	Valves controlled by impact by piston, e.g. in free-piston machines
Total patents	6

Year-over-year patent counts classified under this CPC code.

Filing activity appears stable based on the most recent years.

Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.