(under subclass 39.5) Plants in which some or all of the exhaust gases are returned to the circuit to form a portion of the motive fluid.
SEE OR SEARCH THIS CLASS, SUBCLASS:
39, and 40, for combinations in which a portion of the exhaust is mingled with live motive fluid between the generator and motor, no combustion products fluid being involved.
39.43, in which a portion of the combustion products or exhaust gases is recycled incidental to the dual function of the turbine.
654, 672, 681, 683, and 691, for combinations of a motor with means for returning the exhausted motive fluid, without dissipation of the heat content remaining therein, to the place where energy was originally imparted thereto.
SEE OR SEARCH CLASS 123, Internal-Combustion Engines,
568.11+, for devices to mix a portion of the exhaust gases with the fuel charge.
