Patent ID: 8430210
Filing Date: 2013-04-30
Classification: B66B

Abstract:
1. An elevator system comprising: a first elevator shaft; at least four elevator cabs positioned within said first elevator shaft, said four elevator cabs including a first elevator cab positioned above a second elevator cab, said second elevator cab positioned above a third elevator cab and said third elevator cab positioned above a fourth elevator cab, each of said four cabs having a first and second wall that are substantially parallel; a first set of four cables coupled to said second elevator cab, two cables of said first set of four cables positioned on said first wall of said second elevator cab and the remaining two cables of said first set of four cables positioned on said second wall of said second elevator cab, wherein each of said four cables is connected to a respective counterweight in a first set of counterweights, wherein said respective counterweight is connected to only one cable of said first set of four cables; a second set of four cables coupled to said third elevator cab, two cables of said second set of four cables positioned on said first wall of said third elevator cab and the remaining two cables of said second set of four cables positioned on said second wall of said third elevator cab, wherein each of said four cables is connected to a respective counterweight in a second set of counterweights, wherein said respective counterweight is connected to only one cable of said second set of four cables; each of said second set of four cables positioned such that the cables do not interfere with said first set of four cables connected to said second elevator cab; and a third set of four cables coupled to said fourth elevator cab, two cables of said third set of four cables positioned on said first wall of said fourth elevator cab and the remaining two cables of said third set of four cables positioned on said second wall of said fourth elevator cab, wherein each of said four cables is connected to a respective counterweight in a third set of counterweights, wherein said respective counterweight is connected to only one cable of said third set of four cables, each of said third set of four cables positioned such that the cables do not interfere with either said first set of four cables connected to said second elevator cab or said second set of four cables connected to said third elevator cab.