Elevator installation
AssigneeThyssenkrupp Elevator AG
InventorsHolger Zerelles, Bernd Altenburger, Ronald Dietze, Juri Schäfer
Life of this patent
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Abstract
An elevator installation includes a shaft in which at least two elevator cars are arranged one above the other and are capable of travel upward and downward in a vertical direction separately from one another, wherein each elevator car is assigned a travel drive. The elevator cars are capable of travel with large and small spacings to one another without the risk of collision by coupling at least two elevator cars together by way of a variable-length, releasable coupling device, wherein the spacing between the coupled-together elevator cars can be varied, in a manner dependent on the relative speed between the two elevator cars, with the aid of at least one of the travel drives.
Claims18
An elevator installation, comprising:
- an elevator shaft;
- at least a first elevator car and a second elevator car disposed in said shaft and arranged one above the other, and separately moveable from one another in an upward and downward vertical direction;
- a first travel drive assigned to and operatively engaged with said first elevator car, and configured to provide traveling movement to said first elevator car;
- a second travel drive assigned to and operatively engaged with said second elevator car, and configured to provide traveling movement to said second elevator car;
- and
- a variable-length releasable coupling device configured to:
- selectively couple said first elevator car to said second elevator car,
- permit one of said first or second travel drives to variably adjust a spacing between the coupled-together first and second elevator cars as long as a relative speed between said first and second elevator cars is maintained below a predefined maximum relative speed, and
- prevent a further change in spacing between the coupled-together first and second elevator cars when said relative speed exceeds said predefined maximum relative speed.
Dependencies are inferred from the claim text.