US PATENT SUBCLASS 137 / 138
.~.~.~ Through liquid trap seal

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

123  DF  SIPHONS {8}
132  DF  .~ Periodic or accumulation responsive discharge {4}
136  DF  .~.~ Release of trapped air {2}
138.~.~.~ Through liquid trap seal {1}
139  DF  .~.~.~.~> Auxiliary liquid trap seal

DEFINITION

Classification: 137/138

(under subclass 136) Apparatus in which the trapped air releasing means comprises a liquid trap seal, which may be formed by suitable configuration of the discharge end of the siphon element.

SEE OR SEARCH THIS CLASS, SUBCLASS:

247+, for combinations of liquid trap seals with fluid distribution apparatus other than siphons, and see the search notes to subclass 247.