Milling cutter tool

Claim 1

A MILLING TOOL OF THE TYPE DESCRIBED, COMPRISING A GENERALLY CYLINDRICAL HEAD HAVING AT LEAST TWO SUBSTANTIALLY RADIALLY EXTENDING GROOVES IN ONE END FACE THEREOF AND ADAPTED TO RECEIVE CUTTING BLADES THEREIN, SAID GROOVES EACH HAVING BOTTOM WALLS WHICH INCLINE RADIALLY OUTWARDLY AND TOWARD THE OTHER END FACE OF SAID HEAD, AN ANNULAR SLEEVE STOP MEANS SECURED TO SAID HEAD AND POSITIONED ACROSS THE ENDS OF SAID GROOVES AT THE SAME RADIAL DISTANCE FROM THE AXIS OF SAID HEAD AND ADAPTED TO ENCOMPASS THE LOWER ENDS OF BLADES POSITIONED IN SAID GROOVES, A GENERALLY CIRCULAR CLAMPING MEMBER SECURED TO SAID FIRST END FACE OF SAID HEAD AND BEING AXIALLY MOVABLE RELATIVE TO SAID HEAD, SAID CLAMPING MEMBER BEING FORMED OF A SOFTER METAL THAN THAT OF THE BLADE, A GENERALLY TRIANGULAR CUTTING BLADE DISPOSED IN EACH OF SAID GROOVES AND SECURED THEREIN BY SAID ANNULAR SLEEVE STOP MEANS, SAID CUTTING BLADES HAVING THREE CUTTING EDGES WITH ADJACENT EDGES BEING DISPOSED AT SUBSTANTIALLY A 60* ANGLE TO ONE ANOTHER, ONE OF SAID CUTTING EDGES BEING ADJACENT SAID BOTTOM GROOVE WALL, ANOTHER OF SAID CUTTING EDGES BEING ENGAGED BY SAID CIRCULAR CLAMPING MEMBER AND THE THIRD OF SAID EDGES BEING DISPOSED GENERALLY PARALLEL TO THE AXIS OF SAID HEAD AND AT A RADIAL DISTANCE SUBSTANTIALLY THE SAME AS THAT OF THE INNER WALL OF SAID STOP MEANS.