Earth working implement

An earth working implement comprising a frame adapted to be transported in earth traversing movement along a predetermined path of travel and having a longitudinal axis of reference substantially aligned with said path of travel, said frame having a pair of substantially parallel longitudinal frame members disposed in spaced relation to each other substantially equal distances on opposite sides of said longitudinal axis of reference of the frame interconnected in fixed relation by a pair of transverse beams;

• a first earth working tool mounted on the frame disposed for engagement with the earth during said earth traversing movement and operable to move earth laterally of said path of travel and wherein the first earth working tool has a primary operative position in which the first earth working tool extends substantially equal distances on opposite sides of said longitudinal axis of reference;
• a second earth working tool mounted on the frame forwardly of the first earth working tool relative to said path of travel disposed for engagement with the earth during said earth traversing movement and operable to move earth laterally of said path of travel and wherein the second earth working tool has a primary operative position having a longitudinal axis of reference extending a predetermined distance to one side of said longitudinal axis of reference that is substantially aligned with said path of travel;
• a third earth working tool mounted on the frame rearwardly of the first earth working tool relative to said path of travel and disposed for engagement with the earth during said earth traversing movement and operable to move earth laterally of said path of travel and wherein the third earth working tool has a primary operative position having a longitudinal axis of reference extending a predetermined distance to a side of said longitudinal axis of reference opposite to that of said primary operative position of the second earth working tool and a distance unequal thereto whereby said pair of transverse beams of said frame are disposed at oblique angles substantially aligned with said longitudinal axes of reference of the respective primary operative positions of the second and third earth working tools;
• means mounting said second and third earth working tools in individually supported relation on their respective transverse beams;
• and a plurality of axially aligned plow blades, each of which has opposite concave and convex surfaces, mounted on the first, second and third earth working tools and adapted during said earth traversing movement to engage the earth and to turn the earth, so engaged, generally to the side of said longitudinal axis of reference of the frame to which said concave surfaces face and wherein the directions of movement of the earth laterally of said path of travel by the first, second and third earth working tools is such as to work the earth substantially evenly and to return the earth thereafter to a substantially ambient distribution.