US PATENT SUBCLASS 60 / 39.79
.~.~.~ With fluid actuated valve

Current as of: June, 1999
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60 /   HD   POWER PLANTS

39.01  DF  COMBUSTION PRODUCTS USED AS MOTIVE FLUID {31}
722  DF  .~ Combustion products generator {14}
39.76  DF  .~.~ Intermittent combustion type {5}
39.79.~.~.~ With fluid actuated valve

DEFINITION

Classification: 60/39.79

(under subclass 39.76) Combustion devices in which the combustion air, fuel charge, fuel feeding or exhaust valve is cyclically actuated by a fluid under pressure the application of such fluid under pressure being periodically controlled by a valve or similar means.