US PATENT SUBCLASS 169 / 86
.~.~.~ With means to prevent freezing of expanding gas

Current as of: June, 1999
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169 /   HD   FIRE EXTINGUISHERS

30  DF  PORTABLE VESSELS {5}
71  DF  .~ Gas pressure {9}
85  DF  .~.~ Pressurizing agent stored apart from agent {3}
86.~.~.~ With means to prevent freezing of expanding gas

DEFINITION

Classification: 169/86

(under subclass 85) Apparatus having heat exchange or other means to prevent the temperature of the gas, due to expansion as it passes through an orifice or the like, from decreasing to the point where gas passing therethrough will solidify.