US PATENT SUBCLASS 137 / 60
.~ With freeze waste

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

59  DF  FREEZE CONDITION RESPONSIVE SAFETY SYSTEMS {3}
60.~ With freeze waste

DEFINITION

Classification: 137/60

(under subclass 59) Apparatus which includes means to protect the liquid from freezing by responding to the freezing of the liquid in a chamber.

(1) Note. The freeze chamber may be in the main flow line or may be an auxiliary control chamber which is more exposed to the low temperature.

SEE OR SEARCH THIS CLASS, SUBCLASS:

67+, for frangible control elements not responsive to a freeze condition.