Patent ID: 9573792
Date: 2017-02-21
CPC Classifications: B66B,D07B,Y10T

Claim:
1. An elevator without a machine room, comprising: a hoisting machine; a set of hoisting ropes; a traction sheave that comprises a plurality of grooves; and diverting pulleys; wherein the hoisting machine engages the set of hoisting ropes via the traction sheave, wherein each of the grooves has an opening for receiving an individual hoisting rope from among the hoisting ropes, wherein each respective hoisting rope of the hoisting ropes comprises steel wires of circular, non-circular, or circular and non-circular cross-section, twisted together to form strands, wherein the strands of each respective hoisting rope are twisted together to form the respective hoisting rope, wherein a thickness of each of the hoisting ropes is greater than or equal to about 2.5 mm and less than or equal to about 8 mm, and wherein an average of wire thicknesses of the steel wires of the hoisting ropes is greater than or equal to 0.1 mm and less than or equal to 0.4 mm, and wherein the strength of the steel wires of the hoisting ropes is greater than 2,300 N/mm