(under subclass 347) Apparatus including a V-shaped or diagonally oriented blade used for penetrating the ground to form a trench. [figure] [caption]A - Vehicle; B, C - Plow blade assembly
SEE OR SEARCH THIS CLASS, SUBCLASS:
389+, for a road grader-type plow.
SEE OR SEARCH CLASS
172, Earth Working, appropriate subclasses, especially
721+, for apparatus in which earth working implement is symmetrically arranged with respect to the line of draft; subclasses 754+ for apparatus in which the tool is of the type having a landslide to receive the side pressure of the earth working element and to act as a runner, a point for making an initial cut in the earth, a shave to cut a slice of earth, and a moldboard to guide the furrow slice.
405, Hydraulic and Earth Engineering, 180+, wherein the means for placing the string or conduit below the surface includes a plowlike digging tool for forming a trench.
