US PATENT SUBCLASS 494 / 70
.~.~.~ Each extending away from region with significant downward, as well as significant outward, component (e.g., nested cones)

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

43  DF  ROTATABLE BOWL {16}
67  DF  .~ Including structure located within vertically-oriented bowl and extending outwardly from central region (e.g., axis) thereof {2}
68  DF  .~.~ Comprising plurality of elements, each concentrically encircling axis of bowl and spaced therealong {2}
70.~.~.~ Each extending away from region with significant downward, as well as significant outward, component (e.g., nested cones) {3}
71  DF  .~.~.~.~> And the plurality divided vertically into two or more, physically separate or functionally distinct groups
72  DF  .~.~.~.~> And extending therebeyond generally downwardly
73  DF  .~.~.~.~> And one or more elements having surface displaying three-dimensional configuration

DEFINITION

Classification: 494/70

Each extending away from region with significant downward, as well as significant outward, component (e.g., nested cones):

(under subclass 68) Apparatus wherein each of the elements shows, in section, a profile which is directed not only appreciably outwardly, but also appreciably downwardly, as the element extends away from the axis, or from a locus somewhat removed from the axis.

(1) Note. The initial downward and outward direction of the element often results in imparting thereto the appearance of a cone, or, more specifically, a truncated cone.

(2) Note. The presence of a relatively small, inwardly- or downwardly-directed "flange" at the inner periphery of one or more of the elements is not considered to exclude such a group of elements from this and the indented subclasses.

(3) Note. While the downwardly and outwardly profile usually is linear in appearance, it occasionally shows as a line having some degree of curvature (e.g., the sides of the "cone" are bulged).

(4) Note. Frequently, structure is provided for spacing adjacent elements from one another; for a further discussion of this structure, see (2) Note of subclass 73 below.

SEE OR SEARCH THIS CLASS, SUBCLASS:

73, as explained in the reference thereto appearing in (4) Note above.