An earth anchor of the pivoting type having an essentially cylindrical body, a blind bore extending thereinto from a trailing axial end of the cylindrical body and a leading edge projecting from a leading end of the body, the leading edge being formed as a rounded surface adapted for penetration through reinforcement paths while minimizing severing of the strands of the mat.
1. A driven pivoting anchor of the type having a leading end to be driven into the ground, an intermediate generally cylindrical main body portion from which the leading end projects in a plurality of circumferentially spaced apart rib members and a trailing end adapted to receive a driving instrument for applying a longitudinal driving force to the anchor, the anchor having an attachment point for attaching a withdrawal member, comprising the leading end being generally part spherical, non-pointed, non-sharp having an apex generally aligned with the driving force and being formed by the juncture of the outer rounded edges of at least three of the rib members each of which has opposite side generally flat surface portions circumferentially spaced from the generally flat surface portions of the adjacent ribs until beginning formation of the leading end apex, the rib members extending forward of the main body portion.
2. The anchor of claim 1 wherein the leading end is generally part ball-shaped.
3. The anchor of claim 1 wherein the leading end is generally parabolic in cross section.
4. The anchor of claim 1 wherein the leading end is generally bullet-shaped.
5. The anchor of claim 1 wherein the plurality of ribs extend forward of the main body portion to the leading end, the ribs having generally planer opposite sides and outer edges, the outer edges converging towards one another to the leading end and being rounded adjacent the leading end's apex to provide a curved bullet-shaped nose at the leading edge.
6. A driven pivoting anchor comprising a main body portion, a leading edge and a trailing edge, with a blind bore extending into the main body portion from the trailing edge, a raised rib section on the main body portion having an attachment point for attachment of a withdrawal member, with a plurality of circumferentially spaced rib-like members extending forwardly from the main body member to the leading edge the leading edge comprising a rounded non-pointed, non-sharp surface and the rib members having curved outer edge surface sections converging to the leading edge, the outer edge surfaces blending together to form the apex of the rounded surface of the leading edge, at least one of the ribs having substantially flat opposite side portions spaced from the apex and an outer edge which is aligned with, and blends into, a top surface of the raised rib.
7. The anchor of claim 5 wherein four ribs are provided spaced equal distantly apart, two of the ribs extending backwardly from the leading edge beyond a forward portion of the main body portion and blending into side wings formed alongside the main body portion.
8. The anchor of claim 6 wherein the rounded leading edge is generally part spherically shaped in the areas formed by the edges of the ribs.
9. The anchor of claim 8 wherein the main body portion has a raised rib on one side of the main body portion defining an attachment for attaching a withdrawal member for causing pivoting of the anchor to a final position after the anchor has been driven into the ground.
10. A driven, pivoting anchor comprising a generally cylindrical main body portion, at least three circumferentially spaced rib members projecting forwardly of the main body portion, the rib members having outer edges and generally flat side faces, the outer edges being rounded at least adjacent a leading edge terminating the ribs at a forward end of the anchor, the leading end being rounded, non-pointed, non-sharp having a generally curved outer surface from an apex backwardly a distance towards the main body.
11. The anchor of claim 10 wherein the raised rib converges into one of the at least three ribs forward of the main body portion.