MACHINES OR ENGINES FOR LIQUIDS (for liquids and gases Fulltext... Hierarchy... Expanded...F01; positive-displacement machines for liquids Fulltext... Hierarchy... Expanded...F04); WIND, SPRING, WEIGHT, OR MISCELLANEOUS MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
SPRING, WEIGHT, INERTIA, OR LIKE MOTORS; MECHANICAL-POWER-PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
F03G
Note(s)
In this sub-class, the term "motors" means mechanisms for producing mechanical power from potential energy of solid bodies.
using expansion or contraction of bodies due to heating, cooling, moistening, drying, or the like (using thermal expansion of non-vaporising liquids Fulltext... Hierarchy... Expanded...F01K)
F03G 7/08
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recovering energy derived from swinging, rolling, pitching, or like movements, e.g. from the vibrations of a machine