Tree cutting attachment

Claim 1

IN A CUTTING ATTACHMENT FOR A TRACTOR HAVING A SOURCE OF PRESSURE FLUID, THE COMBINATION COMPRISING (A) A SUPPORTING FRAME ADAPTED FOR REMOVABLE MOUNTING ON THE TRACTOR, (B) A FIXED BLADE SECURED ON SAID SUPPORTING FRAME AND PROJECTING FORWARDLY THEREFROM IN A SUBSTANTIALLY HORIZONTAL PLANE, (C) A ROTATABLE BLADE PIVOTALLY MOUNTED ON SAID SUPPORTING FRAME ADJACENT AND ADAPTED FOR ROTATION INTO ENGAGEMENT WITH SAID FIXED BLADE, (D) PRESSURE FLUID ACTUATED MEANS ADAPTED FOR CONNECTION TO THE TRACTOR SOURCE AND INTERCONNECTING SAID SUPPORTING FRAME AND SAID ROTATABLE BLADE, WHEREBY ACTUATION OF SAID MEANS CLOSES SAID ROTATABLE BLADE INTO ENGAGEMENT WITH SAID FIXED BLADE TO SEVED AN OBJECT THEREBETWEEN, AND (E) A PUSHER ASSEMBLY ROTATABLY MOUNTED ATOP SAID SUPPORTING FRAME AND NORMALLY EXTENDING IN FRONT OF SAID BLADES, SAID PUSHER ASSEMBLY HAVING INTEGRAL FORCE RESPONSIVE MEANS TENDING TO RESTORE SAME TO SAID NORMAL POSITION FOLLOWING REARWARD ROTATION THEREOF.