US PATENT SUBCLASS 111 / 153
.~.~ Runner opener
Current as of: June, 1999
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DEFINITION
Classification: 111/153
Runner opener:
(under subclass 149) 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 top 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 with a plant setting drilling machine.
125, for runner-type openers used in conjunction with a liquid or gas soil treatment.
SEE OR SEARCH CLASS
172, Earth Working,
707+, for resilient tine-type furrow openers, per se.
