Adaptor for converting an L-shaped rod into an earth anchor

A device adapted to serve as the anchor base of a screw-type anchor, wherein the base is intended to be embedded in the earth with a rod extending from the base to the earth's surface. (Placing the anchor in the earth is typically accomplished by rotating it with the aid of a mandrel or the like.) The device includes a generally helical shaped flight having a length of at least one full turn. The flight has an axial opening along its center, with the diameter of the opening being larger than the diameter of an L-shaped anchor rod. Means are provided to firmly connect the helical flight to the anchor rod. One such means includes a reinforcing collar which is rigidly fixed in the axial opening of the flight. Appropriate coupling means are provided to hold the anchor rod and the flight together, so that they may be rotated as a unit so as to burrow the anchor in the earth. Another means for holding the anchor rod and the flight together includes a tube or the like to restrain the bottom end of the anchor rod from rotating with respect to the flight; the flight includes only one complete turn, and the upright portion of the rod may be fixedly held to the flight by virtue of "wedging" it within the axial opening of the flight.