US PATENT SUBCLASS 431 / 60
.~ Of sequential operation of plural burners, e.g., pilot and main, etc.

Current as of: June, 1999
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431 /   HD   COMBUSTION

18  DF  TIMER, PROGRAMMER, RETARDER OR CONDITION RESPONSIVE CONTROL {26}
60.~ Of sequential operation of plural burners, e.g., pilot and main, etc. {1}
61  DF  .~.~> By fuel feed pressure variation

DEFINITION

Classification: 431/60

(under subclass 18) Apparatus in which the actuation causes the starting or stopping at different times of at least two distinct burner head units or burner pots.

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18+, for a burner system in which the sensor of one burner head controls a second burner head.

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137, Fluid Handling,

119.01+, for self controlled branched flow systems of general utility involving alternate or successively substituted outflow.