IPC Subgroup
F23N 3/06 by conjoint operation of two or more valves or dampers
Introduced: September 1968
Last revised: January 2006
Full Title
Regulating air supply or draught > by conjoint operation of two or more valves or dampers
Classification Context
- Section:
- MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- Class:
- COMBUSTION APPARATUS; COMBUSTION PROCESSES
- Subclass:
- REGULATING OR CONTROLLING COMBUSTION