Patent ID: 7207421

Claim:
An elevator without a counterweight having an elevator car, in which the elevator car is suspended by hoisting ropes comprising a single rope or several parallel ropes, said elevator having a traction sheave which moves the elevator car by the hoisting ropes, wherein the hoisting ropes have rope portions going upwards and downwards from the elevator car, and the rope portions going upwards from the elevator car are under a first rope tension (T 1 ) which is greater than a second rope tension (T 2 ), which is the rope tension of the rope portions going downwards from the elevator car, the elevator including a compensating system for keeping a ratio (T 1 ,/T 2 ) between the first rope tension and the second rope tension substantially constant, the elevator car is connected to the hoisting ropes by at least one diverting pulley from a rim of which the hoisting ropes go upwards from both sides of the diverting pulley, and at least one diverting pulley from the rim of which the hoisting ropes go downwards from both sides of the diverting pulley, and a suspension ratio of both upward rope portions and downward rope portions is at least 2:1 roping.