Tooth for digging equipment used in caliche and similar strata

Claim 1

A REPLACEABLE EARTH DIGGING TOOTH FOR PENETRATION AND EXPLOSIVE-LIKE EXCAVATION OF BRITTLE, COMPACTED SOILS HAVING A PROXIMAL PORTION FORMED WITH COOPERATIVE MEANS FOR ATTACHING SAID PROXIMAL PORTION TO EARTH DIGGING EQUIPMENT AND A DISTAL PORTION, SAID PROXIMAL PORTION FORMED WITH ITS LOWERMOST POINTS LYING SUBSTANTIALLY IN A COMMON BOTTOM PLANE, SAID PROXIMAL PORTION HAVING SUBSTANTIALLY PARALLEL SIDE EDGES, SAID DISTAL PORTION BEING SUBSTANTIALLY MORE NARROW IN PLAN THAN SAID PROXIMAL PORTION, THE TOP SURFACE OF SAID DISTAL PORTION FORMED WITH A SUBSTANTIALLY STRAIGHT LONGITUDINALLY EXTENDING SPINE SLOPING DOWNWARDLY-FORWARDLY, THE FLANKS OF SAID TOP SURFACE OF SAID DISTAL PORTION ON EITHER SIDE OF SAID SPINE BEING CONCAVE, THE FRONT END OF SAID TOOTH BEING TRUNCATED AND SQUARE, THE SIDE EDGES OF SAID DISTAL PORTION BEING SUBSTANTIALLY VERTICAL AND IN PLAN BEING SHAPED WITH FORWARD EDGES PARALLEL TO EACH OTHER AND TO SAID PARALLEL SIDE EDGES OF SAID PROXIMAL PORTION, AND SMOOTHLY-INWARDLY CURVED EDGES INTERCONNECTING SAID SIDE EDGES OF SAID PROXIMAL PORTION AND SAID SIDE EDGES OF SAID DISTAL PORTION, THE BOTTOM SURFACE OF SAID TOOTH BEING GENERALLY FLAT FOR COOPERATION WITH SAID FRONT END FOR CUTTING INTO THE SOIL AND LYING IN SAID COMMON BOTTOM PLANE, SAID FLANKS SHAPED TO BREAK AWAY SOIL CUT BY SAID END AND BOTTOM SURFACES.