Pipe anchor

Claim 1

ANNULAR SEGMENTED PIPE ANCHORING MEANS HAVING AN AXIAL PIPE-RECEIVING PASSAGE THERETHROUGH, SAID ANCHORING MEANS COMPRISING MEANS INCLUDING A PLURALITY OF SHARP ANNULAR TEETH DISPOSED IN SAID PASSAGE PRESENTING A GENERALLY CYLINDRICAL PIPE-GRIPPING SURFACE, MEANS INCLUDING A PLURALITY OF ANNULAR SHARP TEETH ON THE EXTERIOR OF SAID ANCHORING MEANS PRESENTING A GENERALLY CONICAL WEDGING SURFACE, EACH OF THE FLANKS OF SAID EXTERIOR TEETH MAKING AN EXTERIOR ANGLE OF AT LEAST NINETY DEGREES WITH A LINE THROUGH THE ROOTS OF THE TEETH PARALLEL TO THE ELEMENTS OF SAID GENERALLY CONICAL WEDGING SURFACE, THE NUMBER OF SAID WEDGING SURFACE TEETH BEING NO MORE THAN OF THE SAME ORDER OF MAGNITUDE AS THE NUMBER OF SAID PIPE GRIPPING SURFACE TEETH TO CAUSE READY YIELDING OF THE COOPERATING SURFACE TO BE ENGAGED BY SAID WEDGING SURFACE WHEN SAID ANCHORING MEANS IS IN USE WHEREBY SAID WEDGING SURFACE CAN MOVE RELATIVE TO SAID COOPERATING SURFACE AND CAUSE SAID PIPE GRIPPING SURFACE TO ENGAGE AND HOLD A PIPE, THE SIZE OF SAID WEDGING SURFACE TEETH BEING OF THE SAME ORDER OF MAGNITUDE AS SAID PIPE-GRIPPING SURFACE TEETH SO THAT THE CORRELATIVE PORTIONS OF SAID COOPERATING SURFACE FORMED AFTER YIELDING THEREOF CAN SUPPORT THE PIPE LOAD.