Concrete spreading apparatus

Claim 1

IN APPARATUS FOR PLACING CONCRETE UPON A SUBGRADE: SPACED APART LEADING AND TRAILING VEHICLES ADAPTED TO SPAN AND TRAVEL ALONG THE SUBGRADE; AN ELONGATED CONVEYOR HAVING A FRAME EXTENDING LENGTHWISE BETWEEN SAID VEHICLES, FOR CONDUCTING CONCRETE REARWARDLY FROM THE FIRST VEHICLE AND DISCHARGING IT ONTO THE SUBGRADE AT A LOCATION ADJACENT TO THE TRAILING VEHICLE, SAID FRAME PROVIDING A LINK OF FIXED LENGTH; MEANS SUPPORTINGLY CONNECTING THE FRONT PORTION OF THE CONVEYOR FRAME TO THE LEADING VEHICLE FOR PIVOTAL MOTION OF THE CONVEYOR ABOUT AN UPRIGHT AXIS FIXED WITH RESPECT TO THE LEADING VEHICLE, SO AS TO PROVIDE FOR SWINGING THE CONVEYOR BACK AND FORTH ACROSS THE SUBGRADE, TOWARD AND FROM A POSITION AT WHICH THE CONVEYOR IS IN ENDWISE ALIGNMENT WITH THE SUBGRADE; MEANS ON THE TRAILING VEHICLE SUPPORTING THE REAR PORTION OF THE CONVEYOR FRAME FOR BACK AND FORTH SWINGING MOVEMENT OF THE CONVEYOR RELATIVE TO THE TRAILING VEHICLE; POWER MEANS ON ONE OF SAID VEHICLES OPERATIVELY CONNECTED WITH THE CONVEYOR FRAME FOR IMPARTING BACK AND FORTH SWINGING MOVEMENT THERETO; AND MEANS COOPERATING WITH THE LINK PROVIDED BY THE CONVEYOR FRAME TO PROVIDE FOR TRANSLATION OF FORCES WHICH SAID POWER MEANS IMPOSES THEREON TO SWING THE CONVEYOR BACK AND FORTH ACROSS THE SUBGRADE INTO FORCES ON SAID VEHICLES THAT CAN BE UTILIZED TO MOVE THE SAME ALONG THE SUBGRADE, COMPRISING A PART CONNECTED TO THE REAR OF THE CONVEYOR FRAME AND FIXED AGAINST TRANSLATORY MOVEMENT RELATIVE THERETO, AND TRACK MEANS ON THE TRAILING VEHICLE ENGAGED WITH SAID CONVEYOR PART TO CONSTRAIN THE SAME TO MOVE TRANSVERSELY OF THE SUBGRADE DURING SWINGING MOVEMENT OF THE CONVEYOR ABOUT ITS AXIS.