US PATENT SUBCLASS 60 / 409
.~.~ Having automatic control

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

325  DF  PRESSURE FLUID SOURCE AND MOTOR {47}
407  DF  .~ Pneumatic motor with gas supply or removal device {3}
409.~.~ Having automatic control {2}
410  DF  .~.~.~> Responsive to condition in gas storage vessel
411  DF  .~.~.~> Suction pressure on motor regulated

DEFINITION

Classification: 60/409

(under subclass 407) Apparatus with structure sensing an external condition or a condition of the apparatus and controlling the apparatus.