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US 6,945,153 B2Granted
Rope for heavy lifting applications
AssigneesCelanese Advanced Materials, Inc., Puget Sound Rope Corporation
InventorsRobert B. Knudsen, Forrest E. Sloan
Life of this patent
Estimating the term…
Abstract
A large diameter rope having improved fatigue life on a sheave, pulley, or drum is disclosed. This rope includes a blend of HMPE filaments and liquid crystal polymer filaments selected from the group of lyotropic polymer filaments and thermotropic polymer filaments. The rope may be constructed as a braided rope, a wire-lay rope, or a parallel core rope.
Claims19
A rope for heavy lifting and mooring applications comprising:
- a rope construction selected from the group consisting of braided ropes, wire-lay ropes, or parallel core ropes, said constructions having a diameter greater than 38 mm and being made of a blend of HMPE filaments and second high strength filaments being selected from the group of lyotropic polymer filaments and thermotropic polymer filaments.
A large diameter, braided rope comprising:
- a plurality of first filaments and a plurality of second filaments, said first filaments being HMPE filaments and second filaments being selected from the group consisting of lyotropic polymer filaments and thermotropic polymer filaments, said HMPE filaments and said second filaments being twisted together to form a twisted yarn,
- a plurality of twisted yarns being braided together to form a braided strand, and
- a plurality of braided strands being braided together to form said large-diameter braided rope.
A method of improving fatigue life of a rope on a sheave, pulley, or drum comprising the steps of:
- providing a rope having 40-60 percent by volume of HMPE filaments, and 40-60 percent by volume of a liquid crystal polymer filament selected from the group consisting of lyotropic polymer filaments and thermotropic polymer filaments.
Dependencies are inferred from the claim text.