.~ Including structure located within bowl and defining axially-extending, helical flow path
DEFINITION
Classification: 494/66
Including structure located within bowl and defining axially-extending, helical flow path:
(under subclass 43) Apparatus wherein the member includes internal structure which moves with it and serves to establish a route for the movement of at least part of the material, and wherein the route established is in the form of a helix which parallels the axis of rotation of the member.
(1) Note. Frequently, the structure of this subclass is tubular in nature, but it may be, instead, rodlike, striplike, etc.
SEE OR SEARCH THIS CLASS, SUBCLASS:
44, for a separator wherein the rotatable bowl comprises a
plurality of bowls which are partly or wholly within one another, and see (3) Note thereof for an explanation of the resemblance which sometimes exists between the art of that subclass (44) and that of this subclass (66).
53+, for a separator wherein the rotatable bowl includes driven material-moving means therewithin and wherein the means is driven rotatably, and coaxially with the bowl, but differs in direction or speed from the rotation of the bowl and further wherein the means includes an element having a helical blade.
