US 4,887,422 A · Rope with fiber core and method of forming same

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.

Claims20

Dependent claims

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.

Dependencies are inferred from the claim text.

Rope with fiber core and method of forming same

Life of this patent

Rope with fiber core and method of forming same

Life of this patent

Abstract

Claims20