US PATENT SUBCLASS 431 / 82
.~.~.~ With fuel feed means downstream of shutdown valve

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


431 /   HD   COMBUSTION

18  DF  TIMER, PROGRAMMER, RETARDER OR CONDITION RESPONSIVE CONTROL {26}
75  DF  .~ By combustion or combustion zone sensor {2}
77  DF  .~.~ Of shutdown by response to sensed combustion failure or overheat {4}
82.~.~.~ With fuel feed means downstream of shutdown valve

DEFINITION

Classification: 431/82

(under subclass 77) Apparatus including means to supply fuel to a burner fuel line down stream of a controlled burner shutdown valve.

SEE OR SEARCH THIS CLASS, SUBCLASS:

56, for a system in which a sensor of a first burner cuts off feed to a first and second burner, said system having a by-pass around the cut off valve to supply the first burner or having an additional supply of fuel for the first burner.