US PATENT SUBCLASS 431 / 31
.~.~.~ Scavenging or purging period started by combustion demand

Current as of: June, 1999
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431 /   HD   COMBUSTION

18  DF  TIMER, PROGRAMMER, RETARDER OR CONDITION RESPONSIVE CONTROL {26}
29  DF  .~ Control of purger, of scavenger or of combustion start-up delay period {1}
30  DF  .~.~ Of scavenging or purging pump {1}
31.~.~.~ Scavenging or purging period started by combustion demand

DEFINITION

Classification: 431/31

(under subclass 30) Apparatus in which, during initiation of a combustion period, the device for moving the cleansing fluid is activated for a predetermined time prior to actuation to combustion starting position of means controlling the necessary fire producing elements, (e.g., fuel supplier, igniter, etc.).