US PATENT SUBCLASS 137 / 76
.~.~.~ With heater for destructible or fusible element

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

67  DF  DESTRUCTIBLE OR DEFORMABLE ELEMENT CONTROLLED {2}
72  DF  .~ Heat destructible or fusible {3}
75  DF  .~.~ Safety cut-off {2}
76.~.~.~ With heater for destructible or fusible element

DEFINITION

Classification: 137/76

(under subclass 75) Apparatus which includes a heating means for the fusible or heat destructible element.

(1) Note. The heating element is usually for the purpose of fusing or otherwise destroying the destructible element to control the operation of the valve.

SEE OR SEARCH THIS CLASS, SUBCLASS:

468, for line condition responsive valves controlled by thermal conditions, and see the search notes thereto.

SEE OR SEARCH CLASS

251, Valves and Valve Actuation, 11, for heat motor actuators for valves.