US PATENT SUBCLASS 137 / 74
.~.~ In fluid flow path

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}
74.~.~ In fluid flow path

DEFINITION

Classification: 137/74

(under subclass 72) Apparatus in which the fusible or heat destructible element is in the passage carrying the flow

controlled and functions as a barrier or stop member for such flow.

(1) Note. The fusion of the fusible element may result in either the opening or closing of the passage carrying the fluid flow.

SEE OR SEARCH THIS CLASS, SUBCLASS:

251+, for liquid valves or barriers.