Portable dump apparatus

Claim 1

IN A DEVICE OF THE KIND DESCRIBED, A WHEEL MOUNTED FRAME STRUCTURE INCLUDING A LATERALLY OUTWARDLY AND UPWARDLY INCLINED GUIDE FRAME AT ONE SIDE THEREOF, MEANS ON SAID FRAME STRUCTURE FOR COUPLING SAID FRAME STRUCTURE TO A TOWING VEHICLE, A CARRIAGE MOUNTED IN SAID GUIDE FRAME FOR GENERALLY UPWARD AND DOWNWARD MOVEMENTS PARALLEL TO THE PLANE OF SAID GUIDE FRAME, AN OPEN-TOPPED DUMP BOX PIVOTALLY MOUNTED AT ITS UPPER END PORTION ON SAID CARRIAGE FOR COMMON MOVEMENTS THEREWITH AND FOR TILTING MOVEMENTS WITH RESPECT THERETO ABOUT A HORIZONTAL AXIS EXTENDING LONGITUDINALLY OF THE DIRECTION OF MOVEMENT OF SAID FRAME STRUCTURE, A BASE MEMBER PIVOTALLY MOUNTED AT ONE END TO SAID FRAME STRUCTURE ADJACENT SAID GUIDE FRAME FOR GENERALLY UPWARD AND DOWNWARD SWINGING MOVEMENTS, ELEVATING MECHANISM COUPLED TO SAID FRAME STRUCTURE AND TO THE FREE END PORTION OF SAID BASE MEMBER FOR IMPARTING SAID SWINGING MOVEMENTS TO THE BASE MEMBER RELATIVE TO SAID FRAME STRUCTURE, AND INDEPENDENT MECHANISM COUPLED TO THE FREE END PORTION OF SAID BASE MEMBER AND TO THE UPPER END PORTION OF SAID DUMP BOX IN LATERALLY SPACED RELATION TO THE PIVOTAL CONNECTION OF SAID DUMP BOX TO SAID CARRIAGE FOR MOVING SAID CARRIAGE AND DUMP BOX RELATIVE TO SAID BASE MEMBER, WHEREBY OPERATION OF BOTH SAID MECHANISMS IN ONE DIRECTION WILL IMPART RAISING MOVEMENT TO SAID BASE MEMBER AND TO SAID CARRIAGE TO ITS UPPER LIMIT OF MOVEMENT AND TILTING MOVEMENT TO SAID BOX TO A DUMPING POSITION AFTER SAID MOVEMENT OF THE CARRIAGE TO THE UPPER LIMIT OF MOVEMENT THEREOF.