Drill bit and rod coupling

Claim 1

A PERCUSSIVELY-ACTUABLE IMPACT ASSEMBLY COMPRISING COAXIAL DRILL BIT AND ROD COMPONENTS, ONE OF SAID COMPONENTS INCLUDING A SOCKET HAVING A FLAT, ANNULAR AREA PERPENDICULAR TO THE AXIS OF SAID ASSEMBLY AND SURROUNDING THE OPEN END OF SAID SOCKET, THE OTHER OF SAID COMPONENTS INCLUDING A STUD RECEIVED IN SAID SOCKET AND HAVING A FLAT, ANNULAR AREA PERPENDICULAR TO THE AXIS OF SAID ASSEMBLY AND SURROUNDING THE END OF SAID STUD ADJACENT TO THE REMAINDER OF ITS ASSOCIATED COMPONENT, SAID ANNULAR AREA ON SAID ONE COMPONENT ABUTTINGLY ENGAGING SAID ANNULAR AREA ON SAID OTHER COMPONENT FOR DIRECT TRANSMISSION OF IMPACTS AXIALLY OF SAID ASSEMBLY, A THREAD JOINT SEPARABLY INTERCONNECTING SAID COMPONENTS, SAID JOINT INCLUDING COMPLEMENTARY THREAD MEANS CARRIED INTERIORLY OF SAID SOCKET AND EXTERIORLY OF SAID STUD, EACH OF SAID THREAD MEANS INCLUDING ALTERNATE CREST AND ROOT PORTIONS DEFINING SPIRAL THREAD CONVOLUTIONS, SAID ROOT PORTIONS OF SAID THREAD MEANS ON SAID SOCEKT AND SAID CREST PORTIONS OF SAID THREAD MEANS ON SAID STUD EACH DEFINING A RIGHT-CYLINDER, THE DIAMETER OF SAID CYLINDER DEFINED BY SAID ROOT PORTIONS OF SAID THREAD MEANS ON SAID SOCKET BEING SLIGHTLY GREATER THAN THE DIAMETER OF SAID CYLINDER DEFINED BY SAID CREST PORTIONS OF SAID THREAD MEANS ON SAID STUD WHEREBY SAID COMPLEMENTARY THREAD MEANS COACT WITH A SLIGHT RADIAL CLEARANCE, THE WIDTH OF SAID ROOT PORTIONS OF SAID THREAD MEANS ON BOTH SAID SOCKET AND SAID STUD EXCEEDING THE WIDTH OF SAID CREST PORTIONS OF SAID THREAD MEANS WHEREBY SAID COMPLEMENTARY THREAD MEANS COACT WITH A SLIGHT AXIAL CLEARANCE ON ONE SIDE OF CONTIGUOUS THREAD CONVOLUTIONS TO PERMIT SLIGHT AXIAL MOVEMENT UNDER IMPACT WITH-