US PATENT SUBCLASS 137 / 137
.~.~.~ Through float-operated vent

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}
137.~.~.~ Through float-operated vent

DEFINITION

Classification: 137/137

(under subclass 136) Apparatus in which the trapped air releasing means is actuated by a float responsive to accumulation of liquid in the siphon system.

SEE OR SEARCH THIS CLASS, SUBCLASS:

202, and 213+, for liquid level responsive vents for gas in diverse fluid containing pressure systems.

409+, for float operated valves of general utility and see the search notes to subclass 409.

583+, for distribution systems having a gas vent and other flow passages, and see the search notes to subclasses 583 and 587.

SEE OR SEARCH CLASS 222, Dispensing,

69, for float operated vents in dispensers.