Scraper blade mount for tractors

Claim 1

IN A KIT FOR MOUNTING A SCRAPER BLADE ON A TRACTOR HAVING A FRONT PAIR OF WHEELS AND A REAR AXLE HOUSING TO CONVERT THE TRACTOR INTO A SCRAPER, THE COMBINATION OF: REARWARD SUPPORT STRUCTURE ADAPTED FOR FIXED CONNECTION TO SAID REAR AXLE HOUSING OF THE TRACTOR; AN ELONGATED RIGID FRAME STRUCTURE TO EXTEND UNDER THE TRACTOR LONGITUDINALLY THEREOF FROM SAID REARWARD SUPPORT STRUCTURE TO A POINT FORWARD OF THE AXIS OF THE FRONT WHEELS OF THE TRACTOR; AT LEAST ONE RADIAL ARM ON THE REAR END OF THE FRAME STRUCTURE; MEANS ATTACHING THE REAR END OF THE FRAME STRUCTURE TO SAID REARWARD SUPPORT STRUCTURE; MEANS INCLUDING A THRUST BEARING TO PERMIT THE FRAME STRUCTURE TO ROTATE ABOUT ITS LONGITUDINAL AXIS RELATIVE TO SAID REARWARD SUPPORT STRUCTURE; MEANS TO MOUNT THE SCRAPER BLADE ON THE FORWARD END OF THE FRAME STRUCTURE WITH THE SCRAPER BLADE FORWARD OF THE FRONT WHEELS OF THE TRACTOR; POWER MEANS CONNECTED TO THE REARWARD SUPPORT STRUCTURE AND TO SAID RADIAL ARM TO EXERT FORCE BETWEEN SAID ARM AND SAID REARWARD SUPPORT STRUCTURE TO ROCK THE FRAME STRUCTURE ABOUT ITS LONGITUDINAL AXIS TO TILT THE SCRAPER BLADE LATERALLY OF THE TRACTOR; AND MEANS TO JOURNAL THE FORWARD PORTION OF SAID FRAME STRUCTURE AND ADAPTED FOR MOUNTING ON THE FORWARD PORTION OF THE TRACTOR TO COOPERATE WITH SAID REARWARD SUPPORT STRUCTURE TO MAINTAIN THE AXIS OF THE FRAME STRUCTURE FIXED RELATIVE TO THE TRACTOR AND TO PERMIT THE FRAME STRUCTURE AND THE SCRAPER BALDE TO TILT LATERALLY RELATIVE TO THE FORWARD END OF THE TRACTOR AS DETERMINED BY THE CONNECTION OF THE FRAME STRUCTURE WITH THE REAR AXLE HOUSING OF THE TRACTOR BY SAID REARWARD SUPPORT STRUCTURE.