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IPC Main Group
F01B 21/00

Combinations of two or more machines or engines

Introduced: September 1968

Last revised: January 2006

Classification Context

Section:
MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
Class:
MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
Subclass:
MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES

Scope Notes

Limiting references: Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby

2 direct subcodes

Child Classifications

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  • F01B 21/02 the machines or engines being all of reciprocating-piston type
  • F01B 21/04 the machines or engines being not all of reciprocating-piston type, e.g. of reciprocating steam engine with steam turbine