CPC Main Group F03G 3/00 Other motors, e.g. gravity or inertia motors 7 direct subcodes Child Classifications Navigate with arrow keys, Enter to open F03G 3/02 using wheels with circumferentially-arranged compartments co-operating with solid falling bodies (F03G3/04 takes precedence) F03G 3/04 driven by sand or like fluent solid material F03G 3/06 using pendulums F03G 3/08 using flywheels F03G 3/087 F03G 3/096 F03G 3/097