(under subclass 120) Apparatus wherein the opening element is symmetrically arranged with respect to the line of draft, has an earth- breaking portion which extends downwardly and rearwardly from the front portion of the element and has side portions extending rearwardly and diverging outwardly from the earth breaking portion and which become generally planar and parallel to each other towards the rear of the element so that the element has an overall shape which resembles the bow portion of a boat.
(1) Note. This definition comprehends flat bottomed structures or structures which have a bottom which is V-shaped in cross-section.
SEE OR SEARCH THIS CLASS, SUBCLASS:
111, for runner-type openers used for plant setting.
153, for runner-type openers used with seed depositors.