Cutter tip holder for roof scratching construction

Claim 1

A CUTTER TIP HOLDER FOR THE CUTTER HEAD OF A ROOF SCRATCHING DEVICE COMPRISING A CIRCULAR PLATE MOUNTABLE ON AN AXLE FOR ROTATION THEREWITH, SAID PLATE HAVING A PLURALITY OF CIRCUMFERENTIAL SLOTS IN THE EDGE THEREOF EXTENDING SUBSTANTIALLY RADIALLY INWARDLY THEREOF, A CUTTER TIP BODY PIVOTALLY MOUNTED ALONG THE LENGTH THEREOF IN EACH OF A PLURALITY FO SAID SLOTS WHEREBY TO PIVOT THEREIN FORWARDLY AND REARWARDLY WITH RESPECT TO THE OPERATING DIRECTION OF ROTATION OF THE HOLDER, EACH CUTTER TIP BODY COMPRISING AN ELONGATE FLAT MEMBER SUBSTANTIALLY RECEIVED IN ONE OF SAID SLOTS AND HAVING A FLAT CUTTING FLANGE ATTACHED TO THE OUTER END THEREOF, THE PLANE OF EXTENSION OF SAID CUTTING FLANGE ORIENTED SUBSTANTIALLY NORMAL TO THE PLANES OF EXTENSION OF SAID PLATE AND THE ELONGATE BODY OF THE CUTTER TIP CARRYING SAME, THE WIDTH OF SAIS CUTTING FLANGE GREATER THAN THE SLOT WIDTH WHEREBY SAID FLANGE REMAINS OUTSIDE OF SAID SLOT, EACH CUTTER FLANGE AND CUTTER TIP BODY HAVING FORWARD AND FOLLOWING EDGES WITH RESPECTG TO THE OPERATING DIRECTION OF ROTATION OF THE HOLDER, THE WALL OF EACH CUTTER TIP CARRYING SLOT FOLLOWING IN THE DIRECTION OF ROTATION OF SAID HOLDER HAVING A FIRST RELATIVELY INWARD BASE POSITIONED SO AS TO CONTACT THE INWARD FOLLOWING EDGE OF THE CUTTER TIP BODY IN A FIRST FORWARDLY POIVOTED POSITION THEREOF AND LIMIT FOR WARD ROTATION OF THE OUTER END OF THE CUTTER TIP IN THE DIRECTION OF OPERATING ROTATION OF THE CUTTER TIP HOLDER, SAID WALL ALSO HAVING A SECOND RELATIVELY OUTWARDLY FACE THEREOF POSITIONED SO AS TO CONTACT THE OUTWARD FOLLOWING EDGE OF THE CUTTER TIP BODY IN A SECOND REARWARDLY PIVOTED POSITION THEREOF AND LIMIT REARWARD ROTATION OF THE OUTER END OF THE CUTTER TIP BODY IN THE DIRECTION OPPOSITE THAT OF OPERATING ROTATION OF THE HOLDER, THE ANGLE OF OUTWARD EXTENSION OF THE CUTTER FLANGE IN THE DIRECTION OF HOLDER ROTATION GREATER AT THE REARWARD ROTATION LIMIT POSITION OF THE CUTTER TIP BODY THAN AT THE FORWARD SAME.