SEAMLESS HELICALLY CORRUGATED TUBES AND METHODS OF MANUFACTURE
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United States of America Patent
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Issued Date -
May 15, 2014
app pub date -
Nov 6, 2013
filing date -
Nov 7, 2012
priority date (Note) -
Abandoned
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Abstract
Flexible, helically corrugated, seamless pipes and tubular conduits of indeterminate length. In some embodiments, these pipes or conduits are formed by a continuous corrugating process on a corrugator. In some embodiments, the pipes are collapsible and are configured to remain in the collapsed and un-collapsed state without the application of external force. Also disclosed are helical tubes include corrugations that follow a counterclockwise path and corrugations that follow a clockwise path. Also disclosed are dual helical tubes with helical corrugations configured such that a portion of each corrugation follows a counterclockwise rotation and another portion of the corrugation follows a clockwise rotation.
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