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
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:
- SPRING, WEIGHT, INERTIA, OR LIKE MOTORS; MECHANICAL-POWER-PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
Description
F03G covers mechanical power generation systems based on springs, weights, inertia, or unconventional energy sources that do not fit within other prime mover classifications. This includes devices such as clockwork motors, gravity-powered mechanisms, flywheel energy systems, and mechanical systems exploiting elastic deformation or rotational inertia. The subclass is designated for innovative mechanical-power-producing devices and mechanisms using energy sources not covered elsewhere in the F03 division (such as hydraulic, pneumatic, wind, or solar systems). It serves as a residual classification for novel mechanical propulsion or power generation technologies outside established categories.
6 direct subcodes
Child Classifications
Navigate with arrow keys, Enter to open
- F03G 1/00 Spring motors
- F03G 3/00 Other motors, e.g. gravity or inertia motors
- F03G 4/00 Devices for producing mechanical power from geothermal energy
- F03G 5/00 Devices for producing mechanical power from muscle energy
- F03G 6/00 Devices for producing mechanical power from solar energy
- F03G 7/00 Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for
Top Applicants
Top 10 applicants by patent filingsfor class F03, 2013–2023, worldwide · Source: EPO PATSTAT
- VESTAS DK 3,539
- WOBBEN PROPERTIES DE 2,922
- SIEMENS GAMESA RENEWABLE ENERGY DK 2,747
- GE (GENERAL ELECTRIC COMPANY) US 2,356
- BEIJING GOLDWIND SCIENCE & CREATION WINDPOWER EQUIPMENT COMPANY 1,228
- SIEMENS DE 886
- SGCC(STATE GRID CORPORATION OF CHINA) 831
- HUANENG CLEAN ENERGY RESEARCH INSTITUTE 785
- MING YANG SMART ENERGY GROUP. 652
- LM WIND POWER DK 600