(under subclass 754) Apparatus in which at least a part of the moldboard is perforated or an open framework usually for the purpose of reducing friction or clearing the furrow slice therefrom.
(1) Note. This definition does not include knives, bars, etc., disposed at the exit edge of the moldboard for the purpose of cutting or breaking the furrow slice.
SEE OR SEARCH THIS CLASS, SUBCLASS:
766, for tools having spaced parallel earth working fingers.
SEE OR SEARCH CLASS
171, Unearthing Plants or Buried Objects, 83, for a plow or cutter having a contiguous, fixed, inclined separator foraminous separator element.
