CORRUGATED FLEXIBLE HOSE WITH INTEGRAL SOCKET AND APPARATUS FOR FORMING SAME

摘要

A flexible length of hose or tubing formed of helical circumferential corrugations and having means integral therewith at one end for threaded connection to another similarly constructed length in end-to-end relation. The internal threads of the helical corrugations at the end having the receptacle or female connection portion are of approximately the same crest and root diameter as the external threads of the rest of the hose to provide a threaded socket for the opposite end of a similarly constructed hose length. A core member is provided for forming the enlarged female socket at one end by the cording process. The core member defines helical threads for progressively enlarging the crest and root diameter of the internal threads of the hose from their smaller dimension to their maximum dimension while maintaining the same pitch to form the female receptacle for the connection.