(under subclass 518) Apparatus comprising brake or stop means for slowing down or stopping the rotation or rolling of the earth working element.
(1) Note. Apparatus in which the retarding means is capable of driving the earth working element is classifiable in subclasses 35+ even if, as actually used, rotation is caused due to the movement of the apparatus over the earth and the "driving means" functions only to retard the motion of the earth working element.
SEE OR SEARCH THIS CLASS, SUBCLASS:
143, for diverse tools one of which is of the intermittently rolling type.
237, for an earth working element which may rotate from a working position through 360 deg. back to the working position, the rotation through part of the cycle being effected by a ground- engageable draft responsive lever.
261+, for tools which may shift upon overload and particularly subclass 262 for apparatus in which an alternate tool is brought into operation as a result of the shift.
683, for an earth working element latched in working position and which moves to a position of less earth resistance when manually unlatched.
