POSITIVE-DISPLACEMENT ENGINES DRIVEN BY 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:: POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS

Description

F03C covers positive-displacement engines and motors powered by pressurized liquids, including hydraulic and hydrostatic systems. This class encompasses reciprocating pumps/motors, rotary vane machines, gear motors, screw motors, and similar devices where liquid flow directly drives mechanical motion through volumetric displacement. Applications include hydraulic power transmission systems, fluid power actuators, and liquid-driven machinery in industrial and mobile equipment. Related classes F03B (water wheels and turbines) and F03D (wind motors) address alternative fluid-driven power sources.

5 direct subcodes

Child Classifications

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F03C 1/00 Reciprocating-piston liquid engines
F03C 2/00 Rotary-piston engines
F03C 4/00 Oscillating-piston engines
F03C 7/00 Engines of flexible-wall type
F03C 99/00 Subject matter not provided for in other groups of this subclass