Dumping type storage bin

Claim 1

IN A STORAGE BIN OF THE CLASS DESCRIBED: A PAIR OF OPPOSITE, PARALLEL, VERTICAL SIDE WALLS; A SECOND PAIR OF OPPOSITE SIDE WALLS EXTENDING BETWEEN THE FIRST MENTIONED SIDE WALLS; SAID SIDE WALLS DEFINING AT THEIR BOTTOM EDGES AN OPENING FOR THE RELEASE OF PRODUCT FROM SAID BIN; A GATE MEANS FOR OPENING AND CLOSING SAID OPENING INCLUDING A PAIR OF LEAVES; PIVOT MEANS FOR SUPPORTING SAID LEAVES FOR SWINGING MOVEMENT ABOUT AXES PERPENDICULAR TO SAID VERTICAL SIDE WALLS, AND SPACED EQUIDISTANTLY ON OPPOSITE SIDES OF THE VERTICAL CENTRAL PLANE OF SAID BIN; SAID LEAVES EACH COMPRISING A SUBSTANTIALLY PLANAR TOE PORTION WHICH, IN THE CLOSED POSITION OF SAID LEAVES, ARE SUBSTANTIALLY HORIZONTAL AND WHICH MEET SUBSTANTIALLY ALONG SAID CENTRAL PLANE, THE MEETING EDGES OF THE TOE PORTIONS BEING PROVIDED WITH INTERFITTING TRIANGULAR TEETH; SAID LEAVES BEING ADAPTED TO SWING ABOUT SAID AXES TO AN OPEN POSITION IN WHICH SAID TOE PORTIONS ARE INCLINED DOWNWARDLY TOWARD EACH OTHER TO DEFINE A CHUTE FOR GUIDING THE CONTENTS OF SAID BIN DISCHARGING THROUGH SAID BIN OPENING; AND MEANS FOR SWINGING SAID LEAVES BETWEEN THEIR OPEN AND CLOSED POSITIONS.