Patent ID: 9365004
Filing Date: 2016-06-14
CPC Classification: A61M,B29C,B29D,B29L,F16L

Claim Text:
1. A method of forming a flexible, stretchable, crush resistant axially extending hose, comprising the steps of providing coils entirely of thermoplastic material to form a continuous helix of substantially constant diameter, providing a thin, narrow, elongate web of thermoplastic material that extends between adjacent coils of the helix and has edge regions welded to adjacent ones of the coils to form a single continuous wall with the web having a radially inwardly extending, centrally located fold situated between adjacent ones of the coils, and enhancing the flexibility of the hose by subjecting the hose to an annealing process while axially compressing the hose so that molecules of the thermoplastic material forming the coils of the helix and the thin elongate web are relaxed such that stress is substantially absent from the hose when the coils of the helix are close together.