HOSE CONSTRUCTION, COUPLING THEREFOR AND METHODS OF MAKING THE SAME

摘要

New hose construction, new couplings therefor and new methods of making such hose constructions and new methods of making such couplings are provided herein. In one embodiment, an improvement is provided in a hose construction including a tu bular hose having an inner peripheral surface and an outer peripheral surface, and a c oupling secured to one end of the tubular hose. The improvement is one wherein the inner peripheral surface means of the tubular hose includes an inner corrugated hose w hich is made of polymeric material and which has inwardly-convex projections with recess es therebetween and which extends from one end of the tubular hose to the other end thereof. In addition, the coupling has an insert which is disposed in one end of the tubular hose and which is radially-outwardly-expanded into sealing relation with the inner corrugated hose. The insert has an outer peripheral surface which is defined by a plurality of outwardly-convex projections with recesses therebetween. Such proje ctions of the insert are respectively received in the recesses of the inner hose. The p rojections of the inner hose are respectively received in the recesses of the insert. In th is way, the interior of the tubular hose is substantially-sealed to the interior of the coup ling. Furthermore, the insert includes an inner tubular metallic sleeve and an outer t ubular polymeric sleeve which is telescopically-disposed on the tubular metallic sleeve and which has an outer peripheral surface that comprises the outer peripheral surfac e of the insert. The inner tubular metallic sleeve and the outer tubular polymeric sleeve have been simultaneously-radially-outwardly-expanded in the telescoped relation there of to provide the sealing relation with the inner corrugated hose.