F03 MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
Description
Class F03 encompasses machines and engines that convert energy from liquids, wind, springs, or weights into mechanical power or propulsive thrust, covering technologies not classified elsewhere in mechanical engineering. This includes hydraulic and pneumatic motors, wind turbines, water wheels, tide and wave energy converters, spring-based mechanisms, and gravitational force engines. The class also encompasses reactive propulsion systems and related equipment for generating or controlling mechanical motion through these non-traditional energy sources. Adjacent classes F01–F02 cover internal combustion engines and turbines respectively, making F03 the residual category for alternative and renewable energy conversion devices.
5 direct subcodes
Child Classifications
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- F03B MACHINES OR ENGINES FOR LIQUIDS (positive-displacement engines for liquid F03C; machines for liquids and gases F01; positive-displacement machines for liquids F04, rotary fluid gearing of the hydrokinetic type F16H41/00)
- F03C POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS (positive- displacement engines for liquids and elastic fluids F01; positive- displacement machines for liquids F04; fluid-pressure actuators F15B; fluid gearing F16H)
- F03D WIND MOTORS
- F03G SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR (arrangements in connection with power supply in vehicles from force of nature B60K16/00; electric propulsion with power supply in vehicles from force of nature B60L8/00)
- F03H PRODUCING A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR (from combustion products F02K)