Patent ID: 6871727

Claim:
An elevator system in tall buildings, said system comprising at least one first elevator shaft, which houses an elevator arranged to stop at floors called transfer levels, and at least one second elevator shaft, which houses elevators whose elevator cars are disposed one above the other in the elevator shaft, which elevator cars are designed to stop during their travel at any floor to which or from which a call has been issued and that the second elevator shaft is divided vertically into local shafts situated one above the other, the number of which is at least one for each zone between transfer levels, and that the elevators in the local shafts are arranged to travel one above the other in the same shaft in such manner that they have their paths in shaft spaces disposed one above the other, characterized in that each elevator travels between the highest and lowest floors of its own local shaft, and that, except for the topmost elevator, the highest floor for each elevator is the next floor below the lowest floor for the elevator immediately above it and that each transfer level comprises an upper and a lower transfer floor so that each lower transfer floor is the highest floor for the elevator car operating in the local shaft that arrives at it and departs from it in downward direction, and that each upper transfer floor is the lowest floor for the elevator car operating in the local shaft that arrives at it and departs in the upward direction.