US PATENT SUBCLASS 137 / 247.49
.~.~.~ Even diameter legs
Current as of:
June, 1999
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137 /
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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}
247.41
DF
.~.~ U-seals {3}
247.49
.~.~.~ Even diameter legs {1}
247.51
DF
.~.~.~.~
> Access opening
DEFINITION
Classification: 137/247.49
(under subclass 247.41) Seals wherein both legs of the U-bend have substantially uniform and like internal cross sections.