IPC Subgroup
F01N 1/02 by using resonance
Introduced: September 1968
Last revised: January 2006
Full Title
Silencing apparatus characterised by method of silencing > by using resonance
Classification Context
- Section:
- MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- Class:
- MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- Subclass:
- GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
1 direct subcode
Child Classifications
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- F01N 1/04 having sound-absorbing materials in resonance chambers