Pavement surface finishing apparatus

Claim 1

IN A PAVEMENT SLAB FINISHING MACHINE, A FRAME ADAPTED TO STRADDLE A SLAB OF PAVEMENT BEING LAID, A FLEXIBLE CROWN DETERMINING ELEMENT CARRIED BY SAID FRAME IN POSITION TO EXTEND TRANSVERSELY OF THE SLAB BEING LAID, A SERIES OF ACTUATING CRANKS EACH HAVING AN INFINITELY ADJUSTABLE THROW CRANK ARM PIVOTALLY MOUNTED ON SAID FRAME IN OPERATIVE RELATIONSHIP WITH SAID FLEXIBLE CROWN DETERMINING ELEMENT, SAID CRANKS BEING ARRANGED IN SPACED RELATIONSHIP THEREALONG, A CRANK PIN MOVABLY MOUNTED ON EACH OF SAID CRANK ARMS FOR RADIAL ADJUSTMENT THEREALONG, SCREW AND NUT ADJUSTING MEANS OPERATIVELY ARRANGED TO EFFECT INCREMENTAL MOVEMENT OF EACH MOVABLE CRANK PIN ALONG ITS RESPECTIVE CRANK ARM TO PROVIDE INFINITELY VARIABLE ADJUSTMENT OF THE THROW OF EACH OF SAID ADJUSTABLE THROW CRANK ARMS INDEPENDENTLY, INTERCONNECTING MEANS OPERATIVELY ARRANGED TO PIVOT ALL OF SAID INDEPENDENTLY ADJUSTED PIVOTALLY MOUNTED ACTUATING CRANKS SIMULTANEOUSLY, AND CONNECTING FORCE TRANSMITTING MEANS OPERATIVELY CONNECTING EACH OF SAID INFINITELY ADJUSTABLE THROW CRANK ARMS TO AN ADJACENT ELEMENT OF SAID FLEXIBLE CROWN DETERMINING MEMBER, WHEREBY UPON PIVOTING SAID SERIES OF SPACED ACTUATING CRANKS SIMULTANEOUSLY SAID FLEXIBLE CROWN DETERMINING MEMBER MAY BE DEFLECTED THROUGHOUT ITS LENGTH IN A MANNER TO ESTABLISH THEREIN A CROWN DETERMINING CONTOUR IN ACCORDANCE WITH THE INDIVIDUAL ADJUSTMENTS OF SAID INTERCONNECTED INFINITELY ADJUSTABLE THROW CRANK ARMS.