Bulldozer modified blade-bucket unit

Claim 1

EARTH-MOVING EQUIPMENT FOR MOUNTING UPON A TRACTOR VEHICLE, COMPRISING SUPPORT ARMS EXTENDING LONGITUDINALLY AND ARRANGED FOR PIVOTAL SUPPORT AT ONE END UPON THE VEHICLE, EXTENSIBLE AND RETRACTABLE MEANS FOR INTERCONNECTING THE VEHICLE AND SAID ARMS TO SWING THE LATTER UPWARDLY AND DOWNWARDLY ABOUT THEIR PIVOTAL SUPPORT, A BUCKET HAVING A BOTTOM AND A LOWER GENERALLY PLANAR SIDE OBTUSELY ANGLED RELATIVE TO THE BOTTOM, AND TERMINATING AT ITS OUTER EDGE IN A BLADE, AN EXTERIOR PLATE ACUTELY ANGLED RELATIVE TO SAID LOWER SIDE, ALONG A LINE SPACED FROM BUT ADJACENT THE BLADE, MEANS BRACING SAID EXTERIOR PLATE FROM SAID LOWER SIDE, MEANS PIVOTALLY MOUNTING SAID BUCKET UPON THE SWINGING END OF SAID ARMS TO TILT ABOUT AN AXIS PARALLEL TO THE BLADE, AND INTERMEDIATE SAID LOWER SIDE AND SAID BOTTOM, AND MEANS CONNECTED BETWEEN SAID ARMS AND THE OPPOSITE SIDE OF THE BUCKET TO CONTROL THE TILT OF THE BUCKET, FROM A BACK-BULLDOZING POSITION WHEREIN THE LOWER SIDE AND THE BLADE ARE INCLINED UPWARDLY AND FORWARDLY, THROUGH A FORWARD-BULLDOZING POSITION WHEREIN THE LOWER SIDE AND BLADE ARE INCLINED UPWARDLY, AND REARWARDLY TO A CARRYING POSITION WHEREIN THE BOTTOM IS GENERALLY LEVEL.