US PATENT SUBCLASS 137 / 78.4
.~ Burner gas cutoff

Current as of: June, 1999
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137 /   HD   FLUID HANDLING

78.1  DF  AMBIENT CONDITION CHANGE RESPONSIVE {4}
78.4.~ Burner gas cutoff

DEFINITION

Classification: 137/78.4

Burner gas cutoff:

(under subclass 78.1) Apparatus in which flow of flammable gas to a burner is stopped in response to a sensed environmental extinguishing action to the flame of the burner.