Fitting connector

Claim 1

A TENSION-SUSTAINING CONNECTION BETWEEN A ROD MADE OF PLASTIC MATERIAL WITH LONGITUDINALLY EXTENDING REINFORCING FIBERS DISTRIBUTED SUBSTANTIALLY UNIFORMLY THROUGHOUT THE ROD AND A TENSION-SUSTAINING FITTING ON SUCH ROD, SAID CONNECTION COMPRISING A ROD-SPREADING INSERT DISPOSED WITHIN SAID ROD AND FORMING AN ELARGEMENT ON THE ROD, SAID INSERT HAVING AN END PORTION WHICH CONVERGES IN A DIRECTION LONGITUDINALLY OF THE ROD OPPOSITE THE DIRECTION OF THE TENSION TO BE APPLIED TO THE ROD, THE SPREAD PORTION OF THE ROD INTIMATELY CONTACTING THE END PORTION OF THE INSERT THROUGHOUT THE EXTENT OF THE LATTER, SAID FITTING HAVING A FERRULE DISPOSED AROUND AND HAVING AN INNER SURFACE INTIMATELY CONTACTING THE ENLARGEMENT ON THE ROD AT THE TRANSVERSE ZONE OF THE ROD CONTAINING THE INSERT, THE AREA OF THE SECTIONS OF THE SPREAD PORTION OF THE ROD OVERLYING THE SAID END PORTION OF THE INSERT IN PLANES TRANSVERSE TO THE LONGITUDINAL AXIS OF THE ROD BEING SUBSTANTIALLY A CONSTANT, THE CONVERGING PORTION OF THE ROD-SPREADING INSERT BEING OF A GENERALLY CONICAL SHAPE, AND THE INNER SURFACE OF THE FERRULE WHICH ENGAGES THE OUTER SURFACE OF THE SPREAD PORTION OF THE ROD BEING IN THE FORM OF AN HYPERBOLOID CONVERGING IN THE SAME DIRECTION AS THE ROD-SPREADING INSERT.