US PATENT SUBCLASS 431 / 37
.~.~ By controlling admittance of feed to structure

Current as of: June, 1999
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431 /   HD   COMBUSTION

18  DF  TIMER, PROGRAMMER, RETARDER OR CONDITION RESPONSIVE CONTROL {26}
36  DF  .~ Of or by burner feed supply heating structure {2}
37.~.~ By controlling admittance of feed to structure {3}
38  DF  .~.~.~> By pressure of feed in structure
39  DF  .~.~.~> By level of liquid feed in structure
40  DF  .~.~.~> By linear expansion of feed holder

DEFINITION

Classification: 431/37

(under subclass 36) Apparatus in which the flow of feed fluid into the feed heating structure is controlled.