| 摘要 |
<p>An earth anchor of the pivoting type having an essentially cylindrical body,a blind bore extending therein to from a trailing axial end of the cylindricalbody and a leading edge projecting from a leading end of the body, the leading edgechisel shaped for ease of penetration into the ground, guiding surfaces extendingsubstantially normal to the leading edge and forward of the main body portion,the guiding surfaces having a plurality of leading chisel edges stepped backfrom the leading edge and from one another as the guiding surface leading edgesare spaced further away from a center of the leading edge, the guiding surfacesterminating in final leading edge spaced axially from the leading edge and laterallyfrom each of the stepped leading edges and having at least a portion which extendradially beyond the main body, guide ridges extending from the final leadingedges to the trailing axial end projecting radially from the body substantiallyno further than the maximum width of the guiding surface leading edges.</p> |
