Importance

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Abstract

An elevator may include: drive machine, hoisting ropes, traction sheave, elevator car, counterweight, and elevator car and counterweight guide rails. The drive machine may engage the hoisting ropes using the traction sheave. The hoisting ropes may support the elevator car on the elevator car guide rails and the counterweight on the counterweight guide rails. The hoisting ropes may include coated hoisting ropes of substantially circular cross-section. The hoisting ropes may have a load-bearing part twisted from steel wires of circular, non-circular, or circular and non-circular cross-section. A cross-sectional area of the steel wires may be less than about 0.2 mm². A strength of the steel wires may be greater than about 2000 N/mm². A core of each hoisting rope may include the load-bearing part. The core may be coated with a substantially thin sheath that forms a surface of the hoisting rope. The sheath may be softer than the core.

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First Claim