Hose coupling

Claim 1

A FITTING FOR USE WITH FLEXIBLE HOSE HAVING A TUBULAR CORE FORMED OF A PLASTIC SUCH AS NYLON, A TUBULAR SHEATH SURROUNDING THE CORE FORMED OF A PLASTIC SUCH AS NYLON, AND A BRAID LAYER BETWEEN THE CORE AND SHEATH, COMPRISING: A TUBULAR INSERT HAVING AN OUTER END PORTION, A MID-PORTION, AN INNER PORTION, AND A BORE EXTENDING CO-AXIALLY THROUGH THE INSERT OPENING OUTWARDLY THROUGH THE OUTER END PORTION, SAID OUTER END PORTION BEING DEFINED EXTERIORLY BY AN AXIALLY OUTWARDLY NARROWING FRUSTOCONICAL GUIDE SURFACE, SAID MID-PORTION BEING DEFINED EXTERIORLY BY A ROUNDED THREAD FRUSTO-CONICALLY TRUNCATED TO DEFINE A SPIRAL, AXIALLY INWARDLY WIDENING EXTENSION OF SAID GUIDE SURFACE, AND SAID INNER PORTION BEING DEFINED EXTERIORLY BY A ROUND THREAD CONTINUING FROM THE INNER END OF THE THREAD OF SAID MID-PORTION AND HAVING A CONSTANT OUTER DIAMETER LARGER THAN THE INNER DIAMETER OF THE HOSE; AND A TUBULAR SOCKET HAVING A BORE EXTENDING AXIALLY THERETHROUGH FOR RECEIVING THE INSERT COAXIALLY THEREIN, SAID BORE HAVING AN OUTER END PORTION, A MIDPORTION, AND AN INNER PORTION, SAID OUTER END AND MIDPORTION OF THE BORE BEING DIAMETRICALLY LARGER THAN SAID OUTER END PORTION AND MID-PORTION OF THE INSERT AND HAVING AN AXIAL CUMULATIVE LENGTH GREATER THAN THE AXIAL CUMULATIVE LENGTH OF THE OUTER END PORTION AND MIDPORTION OF THE INSERT, THE OUTER END OF THE SOCKET INCLUDING ROUNDED MEANS FOR PRECLUDING NOTCHING OF THE HOSE THEREAT, SAID MID-PORTION OF THE SOCKET BORE BEING DEFINED BY A ROUND THREAD HAVING A CONSTANT INNER DIAMETER SMALLER THAN THE OUTER DIAMETER OF THE HOSE, AND SAID INNER PORTION OF THE SOCKET BORE BEING THREADED FOR ENGAGEMENT WITH SAID THREAD OF THE INNER PORTION OF THE INSERT TO DRAW THE INSERT AXIALLY OUTWARDLY TO A POSITION WHEREIN THE OUTER END OF SAID INNER PORTION OF SAID INSERT IS WITHIN SAID MID-PORTION OF THE SOCKET BORE WHEREBY THE OUTER END PORTION, THE MID-PORTION, AND THE OUTER END OF THE INNER PORTION OF THE INSERT ARE FORCED INTO A HOSE END COAXIALLY IN THE OUTER END PORTION AND MID-PORTION OF THE SOCKET BORE FOR RETAINING THE HOSE END IN THE SPACE THEREBETWEEN, SAID THREADED MID-PORTION OF THE SOCKET BORE EXTENDING IN SURROUNDING RELATIONSHIP TO SAID INNER PORTION OF THE INSERT IN THE MADE-UP ARRANGEMENT OF THE FITTING A LENGTH AT LEAST EQUAL TO THE OUTER RADIUS OF THE THREAD OF THE MID-PORTION OF SAID INSERT MEASURED FOR THE AXIS OF THE INSERT TO THE TIP OF THE THREAD.