Rope with fiber core and method of forming same
First Claim
1. A rope comprisinga core comprising a plurality of helically twisted elements, each element comprising a plurality of helically twisted high strength synthetic yarns,and outer strands arranged in a helical pattern surrounding said core, each of said outer strands comprising a plurality of helically twisted metal wires,with the rope achieving a balanced set of helices whereby the elastic modulus of the core and the elastic modulus of the outer strands are about equal.
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Accused Products
Abstract
This invention provides a composite wire rope comprising a plurality of outer strands laid helically about a helically stranded core. The core is comprised of high strength synthetics, such as polyamide or polyolefin materials to form a unitized lay central member. The method for forming the rope comprises the steps of twisting high strength synthetic monofilament yarns into core elements to provide a high degree of stability and overall tensile strength. Each such element is helically laid in a single operation to form the finished core. Lubricant may be applied and subsequently a protective jacket of steel, natural or synthetic material may be provided to encapsulate the core and lubricant. The rope structure is completed by helically laying a plurality of outer strands about the core.
82 Citations
20 Claims
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1. A rope comprising
a core comprising a plurality of helically twisted elements, each element comprising a plurality of helically twisted high strength synthetic yarns, and outer strands arranged in a helical pattern surrounding said core, each of said outer strands comprising a plurality of helically twisted metal wires, with the rope achieving a balanced set of helices whereby the elastic modulus of the core and the elastic modulus of the outer strands are about equal.
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8. A rope comprising
a core comprised of a plurality of core elements wound in a helical configuration, each of said core elements comprised of a plurality of high strength synthetic yarns, and a plurality of outer strands arranged in a helical configuration around said core, each of said outer strands formed by a plurality of metal wires arranged in a helical configuration, with the rope achieving a balanced set of helices whereby the elastic modulus of the core and elastic modulus of the outer strands are about equal.
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17. A method of producing a rope comprising the steps of twisting high strength synthetic yarns into core elements,
helically winding such core elements to form a rope core, and helically laying a plurality of outer strands about said core, each of said outer strands comprising a plurality of metal wires, wherein the elastic modulus of the core and the elastic modulus of the outer strands are about equal.
Specification