Side dump buckets

Claim 1

A LOAD-HANDLING VEHICLE COMPRISING IN COMBINATION, ON A CHASSIS; A LIFTING ARM UNIT PIVOTED AT ONE END TO THE SAID CHASSIS, A FIRST FRAME MOUNTED ON THE OTHER END OF SAID LIFTING ARM UNIT FOR PIVOTAL MOVEMENT ABOUT A FIRST PIVOT AXIS NORMAL TO THE LONGITUDINAL AXIS OF SAID LIFTING ARM UNIT; A SECOND FRAME RESTED UPON SAID FIRST FRAME AND HAVING A PERIMETER INCLUDING TWO SIDES DISPOSED LATERALLY RELATIVE TO THE SAID LIFTING ARM UNIT; A HINGE PIN HINGEDLY CONNECTING ONE OF THE TWO OPPOSITE LATERAL SIDES OF SAID SECOND FRAME TO A CORRESPONDING SIDE OF THE SAID FIRST FRAME AND DEFINING A SECOND PIVOT AXIS ABOUT WHICH SAID SECOND FRAME IS PIVOTABLE UNI-LATERALLY RELATIVE TO THE LONGITUDINAL AXIS OF THE LIFTING ARM UNIT; A BUCKET; A HINGE PIN HINGEDLY CONNECTING THE OTHER OF THE SAID OPPOSITE SIDES OF THE SAID SECOND FRAME TO SAID BUCKET AND DEFINING A THIRD PIVOT AXIS ABOUT WHICH SAID BUCKET IS PIVOTABLE UNI-LATERALLY OPPOSITELY TO THE AFORESAID PIVOTAL MOVEMENT OF THE SECOND FRAME; SAID SECOND AND THIRD PIVOT AXES CONVERGING FORWARDLY RELATIVE TO THE LONGITUDINAL AXIS OF THE LIFTING ARM UNIT, AND PIVOT MEANS CONNECTING THE UNDERNEATH OF THE FIRST FRAME TO THE LIFTING ARM UNIT AND FORMING THE SAID FIRST PIVOT AXIS.