Drive socket insert for bolt heads having tapered conical surface to match bolt

Claim 1

A ROTATABLE FASTENING MEMBER, SAID FASTENING MEMBER HAVING AN OPENING EXTENDING DOWNWARDLY FROM THE TOP THEREOF WITH A CONFIGURATION SIMILAR TO THAT FORMED BY A CONVENTIONAL DRILL, SAID OPENING HAVING A BEVELED PORTION AT THE INNER END THEREOF, AN INSERT PERMANENTLY MOUNTED IN SAID OPENING TO PROVIDE A NON-ROUND RECESS WITHIN THE TOP OF SAID FASTENING MEMBER FOR REMOVABLY RECEIVING A DRIVING MEMBER TO ROTATABLY DRIVE SAID FASTENING MEMBER, SAID INSERT HAVING A GRIPPING PORTION, SAID GRIPPING PORTION HAVING KNURLED GRIPPING MEANS, THE OUTER DIMENSION OF THE OUTER PORTIONS OF SAID GRIPPING MEANS BEING SLIGHTLY GREATER THAN THE INNER DIMENSION OF THE ADJACENT PORTIONS OF SAID OPENING SO THAT SAID GRIPPING MEANS CAN CUT INTO THE INNER WALLS OF SAID OPENING TO PERMANENTLY MOUNT AND HOLD SAID INSERT AGAINST REMOVAL OR ROTATION WITH RESPECT TO SAID FASTENING MEMBER, SAID INSERT HAVING A BEVELED PORTION AT THE INNER END THEREOF FORMED COMPLEMENTARILY TO AND FITTING WITHIN THE BEVELED PORTION OF SAID OPENING, SAID INSERT HAVING A PILOT PORTION DISPOSED BENEATH SAID GRIPPING PORTION, SAID PILOT PORTION COMPRISING A SUBSTANTIAL PORTION OF THE LENGTH OF THE INSERT HAVING AN OUTER DIMENSION SLIGHTLY SMALLER THAN THE INNER DIMENSION OF THE ADJACENT PORTION OF SAID OPENING, SAID PILOT PORTION BEING DIMENSIONED TO FIT WITHIN SAID OPENING TO HOLD SAID INSERT IN SUBSTANTIALLY NON-TILTABLE POSITION WITH RESPECT TO SAID FASTENING MEMBER, WHEREBY SAID INSERT MAY BE PRESSED INTO POSITION WITHIN SAID OPENING, SAID INSERT HAVING AN ANNULAR GROOVE DISPOSED BETWEEN SAID GRIPPING PORTION AND SAID PILOT PORTION, THE EDGE OF SAID GROOVE WHICH IS ADJACENT TO SAID GRIPPING PORTION EXTENDING RADIALLY INWARDLY TO PROVIDE A SUBSTANTIALLY RIGHT ANGULAR CUTTING EDGE CONFRONTING THE PERIPHERAL EDGE OF SAID RECESS TO FACILITATE THE INSERTION OF SAID INSERT INTO SAID OPENING, SAID GROOVE RECEIVING AND HOLDING CHIPS CUT FROM THE WALL OF SAID OPENING UPON THE INSERTION OF SAID INSERT, SAID INSERT HAVING A NON-ROUND RECESS EXTENDING THERETHROUGH FOR REMOVABLY RECEIVING THE TIP OF A DRIVING MEMBER TO DRIVE SAID FASTENING MEMBER, THE TOP OF SAID INSERT HAVING A CIRCULAR COUNTERBORE EXTENDING DOWNWARDLY FROM THE TOP THEREOF CONCENTRICALLY SURROUNDING SAID RECESS, THE DIAMETER OF SAID COUNTERBORE BEING SUBSTANTIALLY EQUAL TO THE MAXIMUM DIAMETER OF SAID RECESS, SAID COUNTERBORE BEING ADAPTED TO GUIDE THE TIP OF THE DRIVING MEMBER TOWARD PROPER POSITION FOR INSERTION INTO SAID RECESS.