US PATENT SUBCLASS 210 / 437
.~.~ Central internal liquid receiver, e.g., tube

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

348  DF  FILTER {25}
435  DF  .~ Within flow line or flow line connected close casing {9}
437.~.~ Central internal liquid receiver, e.g., tube {3}
438  DF  .~.~.~> Imperforate central liquid tube {1}
440  DF  .~.~.~> Inlet and outlet at same end
441  DF  .~.~.~> Attached to casing {1}

DEFINITION

Classification: 210/437

(under subclass 435) Apparatus in which a liquid receiving means such as a tube or equivalent means forming a flow passage is located centrally of a filter medium or element.