US PATENT SUBCLASS 494 / 50
.~ Including driven material-moving means therein

Current as of: June, 1999
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494 /   HD   IMPERFORATE BOWL: CENTRIFUGAL SEPARATORS

43  DF  ROTATABLE BOWL {16}
50.~ Including driven material-moving means therein {2}
51  DF  .~.~> Plural driven means
52  DF  .~.~> Rotatably driven coaxially with bowl, but differing as to direction or speed {2}

DEFINITION

Classification: 494/50

Including driven material-moving means therein:

(under subclass 43) Apparatus which includes driven means located within the member for imparting movement to all or any portion of the material contained in the member, which movement differs in either form or function from that caused by the rotation of the member about its axis.

(1) Note. The movement of the material by the means of this area (50+) may be for such purposes as agitating, distributing, expelling, mixing, or merely transporting.

(2) Note. The means of this area frequently is identified in the art as a "conveyor." However, in view of the variety of purposes served by the means, the term "conveyor" is believed to be unnecessarily restrictive, and, accordingly, has not been relied upon in this reclassification of the art.

(3) Note. For the movement imparted by the means to differ from that resulting from the rotation of the member, the means must either move in some fashion other than rotating about an axis, or, if of the rotating kind, must, for example, (a) turn about an axis which is not the same as the axis of the member, or (b) turn in a different direction than the member, or (c) turn at a different speed (not uncommonly, a differential as small as one rpm) than the member.

Inasmuch as the instance noted in (c) is the most simple and straightforward manner in which to obtain a difference in movement, and, therefore, is the one most commonly utilized, the differential is sometimes merely disclosed and not claimed.

(4) Note. Included in this and the indented subclasses is a small amount of art wherein the means is not positively driven; for example, the means may be caused to move by (a) its engagement with material contained in the bowl, or (b) its frictional contact with a positively driven element, such as a feed tube.

SEE OR SEARCH THIS CLASS, SUBCLASS:

44, for a separator wherein the rotatable bowl comprises a plurality of bowls which are located partly or wholly within one another and wherein at least one of the bowls may be driven relative to at least one other bowl; also, see the reference to this area (50+) appearing in (2) Note thereof. SEE OR SEARCH CLASS

366, Agitating, appropriate subclasses, for process and apparatus for operating on fluid, visious, plastic, or fluent particulate material for causing portions of the material to move irregularly with respect to each other so as to intermix, and particularly

219+, for an agitator having a movable mixing chamber.