Patent ID: 8464972

Claim:
A concrete pulverizing attachment adapted for mounting on an outer end of a dipper arm of a power excavator, said concrete pulverizer attachment comprising: a movable lower jaw having a pivot pin mechanism and a crushing surface on which a concrete piece can be received, said crushing surface being formed with concrete waste apertures; a set of forwardly projecting teeth mounted along a front edge of said lower edge; a movable upper jaw having a rear end section adapted for connection to said outer end of the dipper arm and having crushing teeth mounted on a lower side of the upper jaw, said upper jaw being pivotably connected to said lower jaw by said pivot pin mechanism; pivot means for pivotally connecting said upper jaw to a hydraulic cylinder actuator mounted on a front side of the dipper arm, whereby said upper jaw can be pivoted from an upper open position to a crushing closed position by said hydraulic cylinder actuator, said crushing teeth lying adjacent to said crushing surface in said closed position of the upper jaw; and power means for pivoting said lower jaw between a horizontally extending scooping position for picking up said concrete piece and a dumping position, said power means also being adapted to hold said lower jaw in a crushing position while said upper jaw is being pivoted by said hydraulic cylinder actuator for a concrete crushing operation.