US PATENT SUBCLASS 137 / 72
.~ Heat destructible or fusible
Current as of:
June, 1999
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137 /
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FLUID HANDLING
67
DF
DESTRUCTIBLE OR DEFORMABLE ELEMENT CONTROLLED
{2}
72
.~ Heat destructible or fusible {3}
73
DF
.~.~
> With second sensing means
74
DF
.~.~
> In fluid flow path
75
DF
.~.~
> Safety cut-off {2}
DEFINITION
Classification: 137/72
(under subclass 67) Apparatus in which the flow is controlled in response to an element which is fusible or destructible by heat (e.g., combustible).
SEE OR SEARCH THIS CLASS, SUBCLASS:
79+, for atmospheric temperature responsive flow control.
457, for safety cut-off valves controlled by a thermal condition of the line.
468, for other valves controlled by a thermal condition of a fluid line.
SEE OR SEARCH CLASS
116, Signals and Indicators,
217+, for indicators of the fusible type.
122, Liquid Heaters and Vaporizers,
504.1, for safety device for a boiler with fusible control and subclass 504.3 for a fusible type safety device extinguishing a fire under a boiler.
222, Dispensing,
54, for dispensers having a fusible controller.
431, Combustion,
21, for a burner assembly controlled by a combustion destructible element.
