Concrete supply receptacle and hopper combination

Claim 1

IN A CONCRETE SLAB LAYING MACHINE, A TRANSVERSELY EXTENDING ELONGATED HOPPER MOUNTED ON THE MACHINE ADJACENT ITS FORWARD END, THE HOPPER BEING OPEN AT THE BOTTOM TO DISCHARGE ONTO THE GROUND, A CONCRETE SUPPLY RECEPTACLE DISPOSED ABOVE THE HOPPER TO DISCHARGE INTO THE SAME, A CARRIAGE RIGID WITH THE RECEPTACLE, MEANS MOUNTING THE CARRIAGE ON THE MACHINE FOR MOVEMENT OF THE RECEPTACLE LENGTHWISE OF THE HOPPER OVER THE SAME, THE RECEPTACLE HAVING A BOTTOM DISCHARGE OPENING, A CLOSURE GATE FOR SAID OPENING, MEANS INCLUDING A PIVOT ELEMENT RIGID WITH THE GATE MOUNTING THE SAME ON THE RECEPTACLE FOR OPENING AND CLOSING MOVEMENT, A REMOTE-CONTROLLED MOTOR AND REDUCTION GEAR UNIT MOUNTED ON THE CARRIAGE, AND AN OPERATIVE CONNECTION BETWEEN SAID UNIT AND THE PIVOT TO ROTATE THE LATTER AND THUS SWING THE GATE BETWEEN OPEN AND CLOSED POSITIONS; THE CARRIAGE MOUNTING MEANS COMPRISING A PAIR OF RAILS ON THE MACHINE SPACED LENGTHWISE THEREOF AND DISPOSED PARALLEL TO AND EXTENDING THE FULL LENGTH OF THE HOPPER IN ADJACENT RELATIONSHIP TO SAID HOPPER, WHEELS ON THE CARRIAGE, THE WHEELS NEAREST THE RECEPTACLE RIDING ON THE FOREMOST RAIL AND THE WHEELS FURTHEST FROM THE RECEPTACLE RIDING AGAINST THE UNDERSIDE OF THE REARMOST RAIL, A REMOTE CONTROLLED REVERSIBLE MOTOR MOUNTED ON THE CARRIAGE, AND DRIVE MEANS BETWEEN THE MOTOR AND CERTAIN ONES OF THE WHEELS.