US PATENT SUBCLASS 55 / 321
.~.~.~ Multiple of one type in series of parallel in flow path

Current as of: June, 1999
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55 /   HD   GAS SEPARATION

315  DF  PLURAL SERIAL BASICALLY DIVERSE SEPARATING MEDIA {3}
318  DF  .~ Plural stages in unitary casing {2}
320  DF  .~.~ Deflector and fibrous, filamentary, particulate solids, or cohesive sheet filter type {6}
321.~.~.~ Multiple of one type in series of parallel in flow path {3}
322  DF  .~.~.~.~> Serially spaced with at least one of other type intermediately positioned
323  DF  .~.~.~.~> Filters {1}
325  DF  .~.~.~.~> Serially spaced deflectors {1}

DEFINITION

Classification: 55/321

(under subclass 320) Apparatus comprising three or more separators, at least two of which are of the same basic type, and at least one of a different basic type, the separators of the same basic type being spaced either transverse across, or serially along the flow line.

SEE OR SEARCH THIS CLASS, SUBCLASS:

342+, for multiple similar separators in series or parallel, but with the discrete flow inlet and outlet paths as defined therein.

442+, for plural impingement or flow redirecting surfaces serially spaced.

482+, for two or more filters of the same type arranged in series or in parallel.