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US 7,621,377 B2Granted
Elevator with vertical vibration compensation
AssigneeInventio AG
InventorJosef Husmann
Life of this patent
Estimating the term…
Abstract
An elevator has a car traveling along guide rails within a hoistway and a main drive propelling the car. A sensor mounted on the car measures a vertical travel parameter of the car, a comparator compares the sensed car travel parameter with a reference value derived from the main drive, and an auxiliary motor mounted on the car exerts a vertical force on at least one of the guide rails in response to an error signal output from the comparator.
Claims10
An elevator comprising:
- a car traveling along guide rails within a hoistway;
- a main drive propelling said car;
- a sensor mounted on said car for measuring a vertical travel parameter of said car;
- a comparator comparing said sensed car travel parameter with a reference value derived from said main drive to generate an error signal output;
- and
- an auxiliary motor mounted on said car for exerting a vertical force on at least one of the guide rails in response to said error signal output from said comparator to reduce vibrations exerted on said car.
3 more elements
A method for reducing vibrations exerted on an elevator car comprising the steps of:
- providing a main drive to propel the car along guide rails within a hoistway;
- measuring a vertical travel parameter of the car with a sensor mounted on the car;
- comparing the measured car travel parameter with a reference value derived from the main drive to generate an error signal;
- and
- driving an auxiliary motor mounted on the car to exert a vertical force on at least one of the guide rails in response to the error signal to reduce vibrations exerted on the car.
2 more elements
Dependencies are inferred from the claim text.