Detachable anchor bolts

Claim 1

IN AN ANCHOR BOLT ASSEMBLY ADAPTED TO SUPPORT MINE WORKINGS, ROCK WALLS, FOUNDATIONS AND THE LIKE BY BEING SECURED IN A DRILL HOLE HAVING A TRANSVERSE CROSS SECTIONAL DIMENSION LARGER THAN THE TRANSVERSE CROSS SECTIONAL DIMENSION OF THE ANCHOR BOLT ASSEMBLY BY MEANS OF A CEMENTING MATERIAL, SAID ASSEMBLY INCLUDING: AN ANCHOR BOLT TIP PORTION AND SHANK PORTION DETACHABLY SECURED THERETO, SAID TIP PORTION BEING GENERALLY CYLINDRICAL AND TERMINATING AT ONE END IN A CONE, THE OTHER END OF SAID TIP PORTION HAVING A SMOOTH CYLINDRICAL OUTER WALL SURFACE AND AN INTERNALLY THREADED BORE FORMED COAXIALLY THEREOF, AN EXTERNAL HELICAL CEMENT MATERIAL MIXING GROOVE EXTENDING FROM THE CONE OF SAID TIP PORTION TOWARD THE SAID OTHER END OF SAID TIP PORTION, AT LEAST ONE EXTERNAL LONGITUDINAL GROOVE EXTENDING FROM THE CONE OF SAID TIP PORTION TOWARD SAID OTHER END AND TERMINATING IN THE SMOOTH CYLINDRICAL OUTER WALL SURFACE INWARDLY OF THE OUTERMOST END THEREOF, SAID HELICAL MIXING GROOVE INTERSECTING SAID LONGITUDINAL GROOVE AND TOGETHER FORMING FLOW AND MIXING CHANNELS FOR THE CEMENTING MATERIAL, SEALING MEANS SECURED TO THE SMOOTH CYLINDRICAL OUTER WALL SURFACE AND DISPOSED INWARDLY OF THE TERMINATION OF SAID LONGITUDINAL GROOVE; AND SAID SHANK PORTION INCLUDING A THREADED PORTION AT ONE END ADAPTED TO BE THREADABLY RECEIVED IN THE INTERNALLY THREADED END OF THE TIP PORTION, AND MEANS AT THE OTHER END OF SAID SHANK PORTION FOR ROTATING THE ASSEMBLY IN A DRILL HOLE.