F:	MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING ENGINES OR PUMPS
F03:	MACHINES OR ENGINES FOR LIQUIDS ; WIND, SPRING WEIGHT AND MISCELLANEOUS MOTORS; PRODUCING MECHANICAL POWER; OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
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
F03G1/00:	Spring-motor (spring-driven toys A63H; springs in general F16F; precision time mechanisms, e.g. for clocks or watches, G04B)
F03G1/02:	. characterised by shape or material of spring, e.g. helical, spiral, coil
F03G1/04:	. . using rubber springs
F03G1/06:	. Other parts or details
F03G1/08:	. . for winding
F03G1/10:	. . for producing output movement other than rotary, e.g. vibratory
F03G3/00:	Other motors, e.g. gravity or inertia motors driven by falling liquid F03B
F03G3/02:	. using wheels with circumferentially-arranged compartments co-operating with solid falling bodies
F03G3/04:	. driven by sand or like fluent solid material
F03G3/06:	. using pendulums
F03G3/08:	. using flywheels
F03G5/00:	Devices for producing mechanical power from muscle energy (driving cycles B62M)
F03G5/02:	. of endless-walk type, e.g. treadmills
F03G5/02B:	. . Treadmills
F03G5/04:	. . Horsemills or the like
F03G5/04B:	. . . Traction devices, shock absorbers or whipping devices for horsemills
F03G5/04C:	. . . Security devices for horsemills
F03G5/04D:	. . . Transmissions or couplings for horsemills
F03G5/06:	. other than of endless-walk type
F03G5/08:	. . for combined actuation by different limbs, e.g. hand and leg
F03G6/00:	Devices for producing mechanical power from solar energy
F03G6/00P:	. having photovoltaic cells
F03G6/00R:	. having a Rankine cycle F03G6/06R takes precedence
F03G6/00R2:	. . using an intermediate fluid for heat transfer
F03G6/02:	. using a single state working fluid
F03G6/04:	. . gaseous F03G6/06G, F03G6/06S take precedence
F03G6/04B:	. . . by producing an updraft of heated gas, e.g. air driving an engine
F03G6/06:	. with means for concentrating solar rays
F03G6/06G:	. . having a gas turbine cycle, i.e. compressor and gas turbine combination
F03G6/06R:	. . having a Rankine cycle
F03G6/06R2:	. . . using an intermediate fluid for heat transfer
F03G6/06S:	. . having a Stirling cycle
F03G7/00:	Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for micro-structural devices or systems, e.g. micro-mechanical devices B81B
F03G7/00B:	. using the energy of vibration of a fluid column for refrigeration machines using waves F25B9/14
F03G7/00C:	. Electro-chemical actuators; Actuators having a material for absorbing or desorbing gas, e.g. a metalhydride; Actuators using the difference in osmotic pressure between fluids; Actuators with elements stretchable when contacted with liquid rich in ions, with UV light, with a salt solution
F03G7/04:	. using pressure differences or thermal differences occurring in nature
F03G7/05:	. . Ocean thermal energy conversion, i.e. OTEC
F03G7/06:	. using expansion or contraction of bodies due to heating, cooling, moistening, drying or the like
F03G7/06B:	. . using a shape memory element
F03G7/08:	. recovering energy derived from swinging, rolling, pitching or like movements, e.g. from the vibrations of a machine
F03G7/10:	. Alleged perpetua mobilia