Pavement leveling machine with means for reducing effects of bumps

Claim 1

IN A VEHICLE-TYPE, PAVEMENT LEVELING MACHINE, THE COMBINATION OF: (A) FRAME MEANS HAVING LONGITUDINALLY SPACED FRONT AND REAR ENDS; (B) FRONT WHEEL MEANS CONNECTED TO AND SUPPORTING SAID FRAME MEANS ADJACENT SAID FRONT END THEREOF; (C) A REAR WHEEL ASSEMBLY CONNECTED TO AND SUPPORTING SAID FRAME MEANS ADJACENT SAID REAR END THEREOF; (D) ROTARY CUTTER MEANS MOUNTED ON SAID FRAME MEANS INTERMEDIATED SAID FRONT WHEEL MEANS AND SAID REAT WHEEL ASSEMBLY, AND ROTATABLE ABOUT A HORIZONTAL AXIS EXTENDING TRANSVERSELY OF SAID FRAME MEANS, FOR CUTTING A RELATIVELY WIDE AND LEVEL PATH IN PAVEMENT OVER WHICH THE MACHINE RUNS; (E) SAID ROTARY CUTTER MEANS BEING SPACED FORWARDLY FROM SAID REAR WHEEL ASSEMBLY A FIRST LONGITUDINAL DISTANCE, AND SAID FRONT WHEEL MEANS BEING SPACED FORWARDLY FROM SAID ROTARY CUTTER MEANS A SECOND LONGITUDINAL DISTANCE WHICH IS LARGE AS COMPARED TO SAID FIRST LONGITUDINAL DISTANCE SO THAT ANY TENDENCY OF BUMPS ENCOUNTERED BYU SAID FRONT WHEEL MEANS TO MOVE SAID ROTARY CUTTER MEANS VERTICALLY IS REDUCED IN PROPORTION TO THE RATIO OF SAID FIRST LONGITUDINAL DISTANCE TO SAID SECOND LONGITUDINAL DISTANCE; (F) SAID REAR WHEEL ASSEMBLY BEING BEHIND AND IN LINE WITH SAID ROTARY CUTTER MEANS AND THE TRANSVERSE WIDTH OF SAID ROTARY CUTTER MEANS EXCEEDING THAT OF SAID REAR WHEEL ASSEMBLY SO THAT SAID REAR WHEEL ASSEMBLY RUNS ON THE RELATIVELY WIDE AND LEVEL PATH CUT BY SAID ROTARY CUTTER MEANS TO MINIMIZE ANY TENDENCY OF NUMPS IN THE PAVEMENT TO CAUSE SAID REAR WHEEL ASSEMBLY TO MOVE SAIDROTARY CUTTER MEANS VERTICALLY; (G) SAID REAR WHEEL ASSEMBLY INCLUDING TWO TRANSVERSELY SPACED REAR WHEEL FRAMES EACH HAVING TWO REAR WHEELS ROTATABLY MOUNTED THEREON IN TANDEM; AND (H) MEANS MOUNTING SAID REAR WHEEL FRAMES ON SAID FRAME MEANS FOR INDEPENDENT PIVOTAL MOVEMENT OF SAID REAR WHEEL FRAMES ABOUT A TRANSVERSE HORIZONTAL AXIS INTERMEDIATE SAID TANDEM REAR WHEELS ON SAID REAR WHEEL FRAME STO FUTHER MINIMIZE ANY TENDENCY OF BUMPS IN THE PAVEMENT TO CAUSE SAID REAR WHEEL ASSEMBLY TO MOVE SAID ROTARY CUTTER MEANS VERTICALLY