Elevator – industrial lift truck – or stationary lift for vehicle – Having specific load support drive-means or its control – Includes linking support cable in drive-means
Patent
1998-03-25
2000-07-11
Noland, Kenneth W.
Elevator, industrial lift truck, or stationary lift for vehicle
Having specific load support drive-means or its control
Includes linking support cable in drive-means
187266, B66B 1104
Patent
active
060858729
ABSTRACT:
A roped hydraulic elevator has a hydraulic jack whose upper end, preferably the plunger end, is secured to an upper region of the elevator hoistway, and whose lower end is free to move vertically. A first sheave is supported by the lower end of the jack, and at least one overhead sheave is supported in the upper hoistway region. A rope has one end secured to the hoistway near the top of the hoistway. The rope extends downwardly, around the first sheave, upwardly from the first sheave to the overhead sheave, and downwardly from the overhead sheave to the car, where it is secured. Preferably, a counterweight is supported by the lower end of said jack. Also, preferably one or more guide rails and guide shoes are used to guide the movement of the jack lower end and counterweight. The elevator is relatively simple in design, and the roping system produces a 2:1 ratio of car movement to jack movement, which allows the use of a shorter jack or, alternatively, a greater range of car travel. The system has the advantage that the weight of the plunger, and the weight of the hydraulic fluid inside the jack, inherently act as a counterweight to the weight of the car. Thus, even if a separate counterweight were not to be used, the system reduces the energy needed to raise the car. It also offers the advantage that the rope can be connected to the car near its center of gravity, thereby reducing the load on the car guide rails and shoes.
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Gilliland Oscar
Thomas George J
Noland Kenneth W.
Thyssen Elevator Holding Corporation
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