US PATENT SUBCLASS 210 / 348
FILTER


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

348FILTER {25}
349  DF  .~> Pulsation dampener or gas trapping
350  DF  .~> With movable means to compress medium {2}
353  DF  .~> Free cleaning means, e.g., loose abrading particles
354  DF  .~> Medium, cleaner or agitator moved by fluid {2}
357  DF  .~> Relatively movable members interleaved for cleaning
358  DF  .~> Imperforate drum, medium on arc, chord or end
359  DF  .~> Movable medium {12}
405  DF  .~> Movable prefilt distributor
406  DF  .~> Vacuumized filtrate receiver
407  DF  .~> With residue removing means or agitation of liquid {3}
416.1  DF  .~> With pump, gas pressure, or suction source {4}
417  DF  .~> Alternating oppositely opening liquid distributors
418  DF  .~> With flow controller for material being treated {5}
433.1  DF  .~> Divided filtered, and unfiltered liquid passages {1}
435  DF  .~> Within flow line or flow line connected close casing {9}
455  DF  .~> Receptacle and modified spacing surface or support for filter medium
456  DF  .~> Prefilt flow distributor or diverter
457  DF  .~> With central pervious tubular receiver {1}
459  DF  .~> Pipe or plate attached type {1}
464  DF  .~> Portable receptacle draining type {3}
470  DF  .~> Handled {1}
472  DF  .~> Vented
473  DF  .~> Resting on supporting receiver, e.g., portable {3}
483  DF  .~> Supported, shaped or superimposed formed mediums {11}
500.1  DF  .~> Material {6}


DEFINITION

Classification: 210/348

(under the class definition) Apparatus in which constituents of a prefilt (usually solids and liquid) are separated by passing the prefilt through a medium having openings which retain at least one constituent.

SEE OR SEARCH CLASS

4, Baths, Closets, Sinks, and Spittoons,

286, for strainers specialized for that class.

55, Gas Separation, appropriate subclasses beginning with

474, for gas filters. 166, Wells,

227+, for screens peculiar to wells.

209, Classifying, Separating, and Assorting Solids,

233+, for sifters for solid material.