Bulldozer having a universal blade mounting

Claim 1

A BULLDOZER COMPRISING A TRACTOR HAVING AT LEAST FOUR WHEELS, AT LEAST TWO OF WHICH ARE STEERABLE, A DOZER BLADE, A LOWER PUSH MEMBER OF SUBSTANTIALLY RECTANGULAR CONFIGURATION PIVOTALLY CONNECTED AT TWO HORIZONTALLY SPACED CONNECTIONS TO SAID TRACTOR ADJACENT THE FRONT THEREOF, SAID PUSH MEMBER HAVING TWO HORIZONTALLY SPACED CONNECTIONS TO SAID BLADE AT THE FRONT OF SAID PUSH MEMBER AND ADJACENT THE BOTTOM OF SAID BLADE, ONE OF THE PUSH MEMBER CONNECTIONS TO THE BLADE COMPRISING A UNIVERSAL CONNECTION, THE OTHER CONNECTION BETWEEN THE PUSH MEMBER AND THE BLADE COMPRISING A SLIDE PIVOTALLY CONNECTED TO SAID PUSH MEMBER AND RECEIVED IN A GENERALLY UPWARDLY EXTENDING TRACK SECTION ON SAID BLADE, SAID TRACK SECTION BEING ARCUATE ABOUT SAID UNIVERSAL CONNECTION AS A CENTER OF RADIUS, EXTENSIBLE MEANS ACTING SUBSTANTIALLY VERTICALLY BETWEEN SAID SLIDE AND SAID BLADE FOR VARYING THE TILT OF SAID BLADE ABOUT SAID UNIVERSAL CONNECTION, AN EXTENSIBLE CONNECTION PIVOTALLY CONNECTED TO SAID BLADE ADJACENT THE TOP THEREOF AND PIVOTALLY CONNECTED TO SAID TRACTOR ADJACENT THE FRONT THEREOF FOR VARYING THE PITCH OF SAID BLADE ABOUT THE CONNECTIONS BETWEEN SAID PUSH MEMBER AND SAID BLADE, AND FURTHER EXTENSIBLE MEANS PIVOTALLY CONNECTED TO SAID BLADE AND PIVOTALLY CONNECTED TO SAID TRACTOR FOR RAISING AND LOWERING SAID BLADE.