Patent ID: 7484596

Claim:
An elevator without counterweight, comprising: an elevator car; elevator car guide rails; a plurality of diverting pulleys; a set of hoisting ropes; a hoisting machine; and a compensating device; wherein the elevator car is guided by the elevator car guide rails, wherein the elevator car is suspended by the plurality of diverting pulleys on the set of hoisting ropes so that the elevator has rope portions of the hoisting ropes going upwards and downwards from the elevator car, wherein a first set of the diverting pulleys is disposed in an upper part of a shaft of the elevator, wherein a second set of the diverting pulleys is disposed in a lower part of the elevator shaft, wherein the hoisting machine is disposed in the elevator shaft, wherein the hoisting machine is provided with a traction sheave, wherein the compensating device acts on the hoisting ropes to perform one or more of equalizing elongation of the hoisting ropes, equalizing tension in the hoisting ropes, compensating elongation of the hoisting ropes, and compensating tension in the hoisting ropes, wherein a third set of the diverting pulleys is disposed on the elevator car near two side walls so that rope portions from the traction sheave, from the first set of the diverting pulleys, and from the second set of the diverting pulleys to the third set of the diverting pulleys extend in a substantially vertical direction, and wherein a fourth set of the diverting pulleys is disposed on the elevator car near a top surface of the elevator car so that rope portions running from a first side of the elevator car to a second side of the elevator car extend between the fourth set of the diverting pulleys.