Flexible stretch hose having inwardly extending web portions connecting adjacent pairs of reinforcing coils, with hose properties enhanced by annealing
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United States of America Patent
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Jun 14, 2016
Grant Date -
May 15, 2014
app pub date -
Sep 6, 2013
filing date -
Jan 15, 2009
priority date (Note) -
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Abstract
A flexible, stretchable, crush resistant hose particularly well suited for supplying breathing gases to patients in medical applications and the like has a helix defined by reinforcing coils of thermoplastic material, and a web of thermoplastic material bonded or welded to adjacent ones of the coils, preferably near outer diameter portions of the coils. The web extends radially inwardly between the adjacent pairs of the reinforcing coils to define a helical reverse-direction crease that can be located closer to or farther from a centerline of the hose than is the inner diameter of the reinforcing coils. The thermoplastic material of the hose is stress relieved by an annealing process performed during axial compression of the hose at a time after the hose has been formed.
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