Cutting tool and milling head insert therefor

Claim 1

A CUTTER INCLUDING A MOUNTING PLATE DISPOSED TO PROVIDE A LEADING FACE AND HAVING A SUBSTANTIALLY CYLINDRICAL RECESS OPENING THROUGH SAID FACE AND EXTENDING RELATIVELY REARWARDLY THEREFROM AND ALSO PERIPHERALLY OPENING ONTO ONE EDGE THEREOF AND A CUTTING ELEMENT MOUNTED IN SET BACK RELATION WITHIN SAID RECESS, SAID CUTTING ELEMENT COMPRISING A CIRCULAR SHANK OF BASE MATERIAL SEATED ON THE BOTTOM OF SAID RECESS, AN AXIAL APERTURED CIRCULAR CUTTING DISC OF CARBIDE MATERIAL BRAZED ON ONE FACE OF SAID SHANK, AN AXIAL BOSS ON SAID ONE FACE OF THE SHANK WHICH EXTENDS INTO THE AXIALLY APERTURED CUTTING DISC, THE BOSS BEING OF LESS LENGTH THAN THE THICKNESS OF SAID CUTTING DISC AND SAID BOSS AND SHANK HAVING AN AXIAL OPENING THERETHROUGH AT LEAST A PART OF WHICH IS NON-CIRCULAR, AN ANNULAR RECESS ON SAID ONE FACE OF THE SHANK SURROUNDING THE BOSS TO RECEIVE SURPLUS BRAZING MATERIAL, SAID CUTTING DISC HAVING ITS CIRCUMFERENTIAL SURFACE TAPERED INWARDLY-REARWARDLY FROM ITS OUTSIDE FACE TO PROVIDE A PERIPHERAL RELIEVED CUTTING EDGE AT THE PERIPHERY OF SAID OUTSIDE FACE, AT LEAST A PORTION OF THE CIRCUMFERENTIAL SURFACE OF SAID SHANK BEING ALSO TAPERED INWARDLY-REARWARDLY IN SUBSTANTIAL CONTINUATION OF THE TAPER OF THE CUTTING DISC, THE MAJOR DIAMETER OF THE CUTTING DISC AT SAID PERIPHERAL CUTTING EDGE CORRESPONDING SUBSTANTIALLY TO THE DIAMETER OF SAID CIRCULAR RECESS AND THE MINOR DIAMETER OF THE SHANK PORTION BEING APPRECIABLY LESS THAN SAID RECESS DIAMETER, WHEREBY TO PROVIDE AN ANNULAR SPACE BETWEEN THE RECESS SIDE WALL AND SAID CUTTING ELEMENT WHICH HAS WIDTH THAT INCREASES TOWARD THE RECESS BOTTOM THUS TO PREVENT ANY SUBSTANTIAL WASTE ACCUMULATION IN SAID RECESS, AND A STUD INCLUDING A HEAD SEATED ON THE OUTSIDE FACE OF THE CUTTING DISC AND A STEM EXTENDING THROUGH THE AXIAL OPENING AND SECURED TO SAID MOUNTING PLATE TO RETAIN THE CUTTING ELEMENT IN THE RECESS.