Drill grinding apparatus

Claim 1

MULTIPLE DRILL GRINDING APPARATUS COMPRISING ROTATABLE ABRASIVE MEANS HAVING A GRINDING SURFACE PRESENTING A SUBSTANTIALLY FLAT TRANSVERSE OPERATIVE PORTION, AND DRILL HOLDING MEANS ASSOCIATED WITH SAID ABRASIVE MEANS, SAID HOLDING MEANS COMPRISING SPACED SUPPORT AND PIVOT MEANS DISPOSED AT THE LEVEL OF SAID OPERATIVE PORTION OF SAID GRINDING SURFACE AND ON EACH SIDE THEREOF, THE LINE CONNECTING SAID SPACED SUPPORT AND PIVOT MEANS BEING SUBSTANTIALLY PARALLEL TO SAID OPERATIVE PORTION, A U-SHAPED SUPPORT FRAME INCLUDING A TRANSVERSE MEMBER, SPACED PARALLEL LEGS AND SPACED AXIALLY ALIGNED PIVOT MEMBERS DEPENDING FROM SAID LEGS AT AN ANGLE THERETO, SAID PIVOT MEMBERS ENGAGING SAID SUPPORT AND PIVOT MEANS FOR SWINGING MOVEMENT WITH RESPECT TO SAID SUPPORT AND PIVOT MEANS, A BAR CARRIED BY SAID FRAME AND DISPOSED BETWEEN SAID LEGS AND LONGITUDINALLY THEREOF, MULTIPLE DRILL SUPPORT MEANS CARRIED BY SAID BAR TO HOLD A PLURALITY OF DRILLS SIDE BY SIDE AND IN CONTIGUOUS RELATIONSHIP WITH THE LONGITUDINAL AXES OF SAID DRILLS INCLINED TO SAID OPERATIVE PORTION OF SAID GRINDING SURFACE AT AN ANGLE EQUAL TO THE CUTTING ANGLE OF THE DRILL TIPS AND WITH THE TIPS OF SAID DRILLS IN THE VICINITY OF A LINE JOINING THE AXES OF SAID PIVOT MEMBERS AND OFFSET FROM SAID LINE, WHEREBY, WITH A CUTTING LIP AND ASSOCIATED HEEL SURFACE OF SAID SEVERAL DRILLS HELD IN CONTACT WITH SAID OPERATIVE PORTION OF SAID GRINDING SURFACE, SWINGING MOVEMENT OF SAID FRAME ABOUT SAID SUPPORT AND PIVOT MEANS WILL PRODUCE SHARPENING OF SAID CUTTING LIP AND GRINDING OF SAID HEEL SURFACE OF EACH OF SAID SEVERAL DRILLS.