US PATENT SUBCLASS 210 / 429
.~.~ Filter coaxial with valve seat or valve stem

Current as of: June, 1999
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210 /   HD   LIQUID PURIFICATION OR SEPARATION

348  DF  FILTER {25}
418  DF  .~ With flow controller for material being treated {5}
429.~.~ Filter coaxial with valve seat or valve stem {2}
430  DF  .~.~.~> Filter surrounds valve
431  DF  .~.~.~> Filter fixed to valve seat, opposed to valve head

DEFINITION

Classification: 210/429

(under subclass 418) Apparatus in which the seat or the stem of the flow controller is coaxial with the filter.