US PATENT SUBCLASS 137 / 247.37
.~.~.~ Hinged seal bowl

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

247  DF  WITH LIQUID VALVES OR LIQUID TRAP SEALS {3}
247.11  DF  .~ Liquid seal in liquid flow line; flow liquid forms seal {8}
247.35  DF  .~.~ Submerged inlet pipe end {2}
247.37.~.~.~ Hinged seal bowl

DEFINITION

Classification: 137/247.37

(under subclass 247.35) Seals wherein the chamber comprises an overflow seal bowl hinged for movement into and out of seal forming position.