Pavement leveling machine having hydraulically snubbed cutter head

Claim 1

IN A SELF-PROPELLED, VEHICLE-TYPE, PAVEMENT-CUTTING MACHINE, THE COMBINATION OF: (A) FRAME MEANS COMPRISING REAR MAIN AND FRONT EXTENSION FRAMES EACH HAVING FRONT AND REAR ENDS; (B) MEANS PIVOTALLY CONNECTING SAID REAR END OF SAID EXTENSION FRAME TO SAID MAIN FRAME, REARWARDLY OF SAID FRONT END OF SAID MAIN FRAME, FOR RELATIVE PIVOTAL MOVEMENT ABOUT A TRANSVERSE HORIZONTAL AXIS; (C) REAR WHEEL MEANS CONNECTED TO SAID MAIN FRAME ADJACENT THE REAR ENDS THEREOF AND PROVIDING FOR PIVOTAL MOVEMENT OF SAID MAIN FRAME ABOUT A TRANSVERSE HORIZONTAL AXIS: (D) FRONT WHEEL MEANS LOCATED FORWARDLY OF THE FRONT END OF SAID MAIN FRAME AND CONNECTED TO ANDN SUPPORTING SAID EXTENSION FRAME ADJACENT THE FRONT END THEREOF; (E) ROTARY CUTTER MEANS MOUNTED ON SAID MAIN FRAME ADJACENT THE FRONT END THEREOF AND ROTATABLE ABOUT A TRANSVERSE HORIZONTAL AXIS; (F) MEANS ON SAID FRAME MEANS AND CONNECTED TO SAID ROTARY CUTTER MEANS AND SAID REAR WHEEL MEANS FOR DRIVING SAID ROTARY CUTTER MEANS AND FOR UPROPELLING THE MACHINE; AND (G) VARIABLE-LENGTH MEANS INTERCONNECTING SAID MAIN FRAME ADJACENT THE FRONT END THEREOF AND SAID EXTENSION FRAME INTERMEDIATE THE FRONT AND REAR ENDS THEREOF FOR SNUBBING SAID ROTARY CUTTER MEANS AGAINST UPWARD MOVEMENT RELATIVE TO SAID EXTENSION FRAME.