US PATENT SUBCLASS 62 / 649
.~.~.~.~.~ Flowline expansion engine

Current as of: June, 1999
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62 /   HD   REFRIGERATION

600  DF  CRYOGENIC TREATMENT OF GAS OR GAS MIXTURE {4}
617  DF  .~ Separation of gas mixture {3}
640  DF  .~.~ Air {3}
643  DF  .~.~.~ Distillation {4}
648  DF  .~.~.~.~ Downstream operation {2}
649.~.~.~.~.~ Flowline expansion engine {3}
650  DF  .~.~.~.~.~.~> High pressure nitrogen
651  DF  .~.~.~.~.~.~> Low pressure nitrogen
652  DF  .~.~.~.~.~.~> Oxygen

DEFINITION

Classification: 62/649

Flowline expansion engine:

(under subclass 648) Subject matter wherein the refrigeration circuit comprises a flow line with a means to convert the energy of expansion into mechanical energy.

SEE OR SEARCH CLASS

415, Rotary Kinetic Fluid Motors or Pumps, appropriate subclass for a turbine not specialized for refrigeration.