US PATENT SUBCLASS 137 / 79
.~.~ Temperature
Current as of:
June, 1999
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137 /
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FLUID HANDLING
78.1
DF
AMBIENT CONDITION CHANGE RESPONSIVE
{4}
78.5
DF
.~ Atmospheric {2}
79
.~.~ Temperature {1}
80
DF
.~.~.~
> With additional diverse control
DEFINITION
Classification: 137/79
(under subclass 78.5) Apparatus which controls a fluid flow
in response to variations of temperature in the surrounding atmosphere.
(1) Note. This subclass includes apparatus which sense the presence of a fire in the atmosphere and exercise a control in response thereto.
SEE OR SEARCH THIS CLASS, SUBCLASS:
59+, for freeze condition responsive safety devices.
67+, for systems controlled by a heat destructible or fusible means.
468, for thermally responsive valves responding to line condition change, and see the search notes thereto.
SEE OR SEARCH CLASS
169, Fire Extinguishers,
56+, for fire extinguishers including valves responsive to the occurrence of fire conditions.
