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IPC Subclass
F03B

MACHINES OR ENGINES FOR LIQUIDS

Introduced: September 1968

Classification Context

Section:
MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
Class:
MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
Subclass:
MACHINES OR ENGINES FOR LIQUIDS

Description

F03B covers turbomachinery and reciprocating devices that convert energy between flowing or pressurized liquids and mechanical work, including turbines, pumps, compressors, and hydraulic motors. This subclass encompasses both impulse and reaction turbines driven by water or other liquids, as well as positive-displacement and dynamic machines where liquid serves as the working medium. Related reciprocating engines driven by liquid pressure or flow are included, though steam and gas engines are classified separately in F03C and F03D respectively.

Related Keywords

water or tide MILL(S)

9 direct subcodes

Child Classifications

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  • F03B 5/00 Machines or engines characterised by non-bladed rotors, e.g. serrated, using friction
  • F03B 7/00 Water wheels
  • F03B 9/00 Endless-chain type machines or engines