Reinforcement structure

  • US 4,499,716 A
  • Filed: 06/13/1983
  • Issued: 02/19/1985
  • Est. Priority Date: 06/13/1983
  • Status: Expired due to Term
First Claim
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1. A reinforcement structure consisting of a core surrounded by a sheath, said core being under at least 0.1% radial compression and comprising longitudinally aligned yarn and said sheath comprising a helical wrapping of yarn with adjacent turns of the helical wrapping abutting and being positioned at an angle to the core of between 80 and 90 degrees, the ratio of sheath thickness to the radius of the reinforcement structure being from 0.01 to 0.25, and the yarn of both sheath and core having a tenacity greater than 10 dN/tex, and an initial modulus greater than 200 dN/tex.

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