Vehicle hopper closure

Claim 2

IN COMBINATION WITH A HOPPER ADAPTED TO HANDLE LADING AND HAVING AN ELONGATED WIDE-MOUTHED DISCHARGE OPENING OF SUFFICIENT CAPACITY FOR THE LADING TO BE PRECIPITOUSLY DISCHARGED UPON FULL OPENING OF SAID DISCHARGE OPENING, INNER AND OUTER PAIRS OF HORIZONTALLY EXTENDING CLOSURE GATES FOR SAID OPENING HAVING UPSTANDING END WALLS AND INCLUDING MEANS PIVOTALLY SUPPORTING SAID GATES ADJACENT THE OPPOSITE ENDS OF SAID ELONGATED DISCHARGE OPENING FOR SWINGING MOVEMENT TOWARD AND AWAY FROM A MEDIAL VERTICAL PLANE THROUGH SAID DISCHARGE OPENING, SAID PIVOTAL SUPPORT MEANS FOR SUPPORTING SAID INNER AND OUTER GATES FOR INDEPENDENT MOVEMENT AND BEING SO ARRANGED THAT WHEN ALL GATES ARE IN THEIR RESPECTIVE CLOSED POSITIONS GRAVITY FORCES ARE EFFECTIVE ON THE OUTER PAIR OF GATES TO URGE THEM TO SWING TOWARD ONE ANOTHER AND EFFECTIVE ON THE INNER GATES TO URGE THEM TO SWING AWAY FROM THEIR CLOSED POSITION, AND MEANS TO MOVE SAID GATES TO AND TO HOLD THEM SELECTIVELY IN OPEN, CLOSED AND INTERMEDIATE POSITIONS THEREBETWEEN.

Claim 3

A MOBILE MATERIAL TRANSPORTING VEHICLE HAVING A CHASSIS PROVIDED WITH AT LEAST ONE PAIR OF REAR WHEELS, AN ELONGATED HOPPER ADAPTED TO HANDLE LADING SUPPORTED LENGTHWISE OF SAID CHASSIS HAVING AN OUTLET OPENING SPACED CLOSELY ABOVE THE ROADWAY, SAID OPENING BEING SUBSTANTIALLY AS WIDE AS THE SPACING BETWEEN THE LATERAL SIDE WALLS OF SAID HOPPER WHEREBY TO DUMP LADING FROM THE HOPPER INTO A RELATIVELY WIDE-BASED LOW-HEIGHT HEAP, A PLURALITY OF PAIRS OF CLOSURE MEMBERS NORMALLY CLOSING SAID HOPPER OUTLET OPENING AND PIVOTED TO SWING ABOUT AXES PARALLEL TO THE LONGITUDINAL AXIS OF SAID HOPPER AND POSITIONED ABOVE THE MATERIAL SUPPORTING SURFACES OF SAID CLOSURE MEMBERS WHEN CLOSED, THE BOTTOMS OF ONE PAIR OF SAID CLOSURE MEMBERS, WHEN CLOSED, BEING POSITIONED SUBSTANTIALLY BELOW THE LEVEL OF THE AXLES OF SAID REAR WHEELS AND CLOSE TO THE ROADWAY, AND MEANS INCLUDING FLUID-POWERED MEANS CONNECTED WITH ONE PAIR OF SAID CLOSURE MEMBERS AND EFFECTIVE TO HOLD ALL OF SAID MEMBERS CLOSED WHEN ACTUATED IN ONE DIRECTION AND EFFECTIVE TO OPEN SAID ONE PAIR OF CLOSURE MEMBERS OUTWARDLY AND UPWARDLY AWAY FROM THE ROADWAY IN ADVANCE OF THE OPENING OF THE SECOND PAIR OF CLOSURE MEMBERS WHEN ACTUATED IN THE REVERSE DIRECTION.

Claim 4

A MOBILE MATERIAL TRANSPORTING VEHICLE HAVING A CHASSIS PROVIDED WITH AT LEAST ONE PAIR OF REAR WHEELS, AN ELONGATED HOPPER ADAPTED TO HANDLE LADING SUPPORTED LENGTHWISE OF SAID CHASSIS HAVING AN OUTLET OPENING SPACED CLOSELY ABOVE THE ROADWAY, SAID OPENING BEING SUBSTANTIALLY AS WIDE AS THE SPACING BETWEEN THE LATERAL SIDE WALLS OF SAID HOPPER WHEREBY TO DUMP LADING FROM THE HOPPER INTO A RELATIVELY WIDE-BASED LOW-HEIGHT HEAP, A PLURALITY OF PAIRS OF CLOSURE MEMBERS NORMALLY CLOSING SAID HOPPER OUTLET OPENING AND PIVOTED TO SWING ABOUT AXES PARALLEL TO THE LONGITUDINAL AXIS OF SAID HOPPER AND POSITIONED ABOVE THE MATERIAL SUPPORTING SURFACES OF SAID CLOSURE MEMBERS WHEN CLOSED, THE BOTTOMS OF ONE PAIR OF SAID CLOSURE MEMBERS, WHEN CLOSED, BEING POSITIONED SUBSTANTIALLY BELOW THE LEVEL OF THE AXLES OF SAID REAR WHEELS AND CLOSE TO THE ROADWAY, AND MEANS INCLUDING FLUID-POWERED MEANS CONNECTED WITH ONE PAIR OF SAID CLOSURE MEMBERS AND EFFECTIVE TO HOLD ALL OF SAID MEMBERS CLOSED WHEN ACTUATED IN ONE DIRECTION AND EFFECTIVE TO OPEN SAID ONE PAIR OF CLOSURE MEMBERS OUTWARDLY AND UPWARDLY AWAY FROM THE ROADWAY IN ADVANCE OF THE OPENING OF THE SECOND PAIR OF CLOSURE MEMBERS WHEN ACTUATED IN THE REVERSE DIRECTION.