Vacuum coupling for self-drilling masonry anchor chucks

Claim 1

IN COMBINATION, A CHUCK ADAPTED TO MOUNT A SELFDRILLING EXPANSION ANCHOR AND BEING OF THE TYPE CHARACTERIZED BY A CYLINDRICAL BODY HAVING AN AXIAL BORE OPENING AT ONE END ONLY OF SAID BODY OF RECEIVING AN ANCHOR THEREIN, AND A TRANSVERSE BORE COMMUNICATING AT EACH END WITH SAID AXIAL BORE AND LOCATED ADJACENT THE SAID ONE END OF THE BODY FOR RECEIVIN ANCHOR EJECTOR MEANS THEREIN; A VACUUM COUPLING DETACHABLY MOUNTED ON SAID CHUCK, SAID COUPLING COMPRISING A FIRST THIN WALL CYLINDRICAL ELASTIC TUBE FRICTIONALLY ENGAGING A MAJOR PORTION OF THE OUTER CIRCUMFERENTIAL SURFACE OF SAID BODY, THE ELASTIC NATURE AND DIAMETER OF SAID FIRST TUBE BEING ADAPTED TO VARIOUS SIZES OF SAID BODY FOR COVERING ONE END ONLY OF SAID TRANSVERSE BORE, AND A SECOND THIN WALL CYLINDRICAL ELASTIC TUBE INTEGRALLY SECURED AT ONE END TO SAID FIRST TUBE IN A T CONFIGURATION AND COMMUNICATING WITH THE UNCOVERED END OF SAID TRANSVERSE BORE THEREBY ENABLIN CUTTING DUST AND THE LIKE TO BE REMOVED THROUGH SAID UNCOVERED END UPON APPLICATION OF A VACUUM SOURCE TO SAID SECOND TUBE.