US PATENT SUBCLASS 431 / 29-- .~ Control of purger, of scavenger or of combustion start-up delay period

US PATENT SUBCLASS 431 / 29
.~ Control of purger, of scavenger or of combustion start-up delay period

Current as of: June, 1999
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431 /	HD	COMBUSTION

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

DEFINITION

Classification: 431/29

(under subclass 18) Apparatus wherein a timing, retarding or programming means (1) effects the operation of a device which (a) supplies a quantity of fluid other than a combustible mixture to cleanse the burner of any undesirable fluid or (b) drains or otherwise removes undesirable fluid from the burner between combustion stopping and starting; or (2) causes upon the actuation of means calling for a combustion operation a predetermined period of inaction of any fire producing elements.

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3, for processes involving decarbonizing, cleaning or purging.