(under subclass 662) Apparatus wherein the plural helical surface formations comprise a plurality of coaxial elements, each of which has formed thereon a working surface which extends for less than 360o about the common axis.
(1) Note. The working surface of an individual element may itself be a segment of a helical surface, or it may be planar in nature; in the latter instance, however, the elements are arranged along the axis in such a manner as to form a helical path.
(2) Note. In the instance of those elements which have a working surface which is a segment of a helical surface, the elements may abut one another in such a manner that the individual surfaces form a continuous helical surface.
(3) Note. The structures of this subclass commonly provide means to attach the elements to a member (e.g., a shaft) which extends along the common axis.
SEE OR SEARCH CLASS
141, Fluent Material Handling, With Receiver or Receiver Coacting Means, 73, for a collection of packing augers wherein blade-like members on a shaft are utilized to move and/or pack fluent material into a receiver.
