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Tube with reverse necking properties

  • US 8,801,774 B2
  • Filed: 04/18/2013
  • Issued: 08/12/2014
  • Est. Priority Date: 07/15/2009
  • Status: Active Grant
First Claim
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1. A tubular structure having a longitudinal axis comprisinga wrap of at least one tape at a first wrap angle of x, and a wrap of at least one tape at a second wrap angle of y, with both wraps being in the same relative direction;

  • x and y both formed at an angle of about 0 to 90 degrees relative to the axis of the tubular structure;

    x being an angle different from y, and x and y oriented at an acute included angle with respect to each other;

    wherein when axial force is applied to the tubular structure, both x and y decreases relative to the longitudinal axis, and the acute included angle between x and y increases; and

    the tubular structure having a first diameter and a first axial length, wherein when the tubular structure is increased from the first axial length to an elongated second axial length, the first diameter increases to an enlarged second diameter.

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