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US 2021/0331902 A1Published application
Elevator brake assembly
AssigneeOtis Elevator Company
InventorsAmir Lotfi, Michael C. Lang
Life of this patent
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Abstract
An elevator brake assembly including an asymmetrical brake comprising at least three brake segments, a brake activating device operably coupled to the asymmetrical brake, the brake activating device comprising a first activation element and a second activation element, wherein the first activation element is configured to activate one of the at least three brake segments, and the second activation element is configured to activate the remaining of the at least three brake segments.
Claims15
An elevator brake assembly comprising:
- an asymmetrical brake comprising at least three brake segments;
- and
- a brake activating device operably coupled to the asymmetrical brake, the brake activating device comprising a first activation element and a second activation element;
- wherein the first activation element is configured to activate one of the at least three brake segments, and the second activation element is configured to activate the remaining of the at least three brake segments;
- wherein, when an elevator car is empty and moving in a downward direction, the brake activating device is configured to activate both the first activation element and the second activation element to apply the at least three brake segments;
- wherein, when the elevator car is empty and moving in an upward direction, the brake activating device is configured to sequentially activate the asymmetrical brake by activating the second activation element to apply all but one of the at least three brake segments and, after a time delay, activate the first activation element to apply one of the at least three brake segments;
- wherein, when the elevator car is balanced and moving in either the up or down direction, the brake activating device is configured to sequentially activate the asymmetric brake by activating the first activation element to apply one of the at least three brake segments and, after a time delay, activate the second activation element to apply the remaining at least three brake segments.
4 more elements
An elevator system comprising:
- a machine housing;
- a rotatable output shaft mounted in said machine housing;
- a sheave mounted on said output shaft and rotatable therewith;
- and
- a brake assembly configured for braking said output shaft, the brake assembly comprising:
- an asymmetrical brake comprising at least three brake segments;
- and
- a brake activating device operably coupled to the asymmetrical brake, the brake activating device comprising a first activation element and a second activation element;
- wherein the first activation element is configured to activate one of the at least three brake segments, and the second activation element is configured to activate the remaining of the at least three brake segments;
- wherein, when an elevator car is empty and moving in a downward direction, the brake activating device is configured to activate the first activation element and the second activation element to apply the at least three brake segments;
- wherein, when the elevator car is empty and moving in an upward direction, the brake activating device is configured to sequentially activate the asymmetrical brake by activating the second activation element to apply all but one of the at least three brake segments and, after a time delay, activate the first activation element to apply one of the at least three brake segments;
- wherein, when the elevator car is balanced and moving in either the up or down direction, the brake activating device is configured to sequentially activate the asymmetric brake by activating the first activation element to apply one of the at least three brake segments and, after a time delay, activate the second activation element to apply the remaining at least three brake segments.
9 more elements
An elevator system comprising:
- a machine housing;
- a rotatable output shaft mounted in said machine housing;
- a sheave mounted on said output shaft and rotatable therewith;
- a roping arrangement arranged on the sheave, the roping arrangement coupled to an elevator car;
- and
- a brake assembly configured for braking said output shaft, the brake assembly comprising:
- an asymmetrical brake comprising at least three brake segments;
- and
- a brake activating device operably coupled to the asymmetrical brake, the brake activating device comprising a first activation element and a second activation element;
- wherein the first activation element is configured to activate one of the at least three brake segments, and the second activation element is configured to activate the remaining of the at least three brake segments;
- wherein the brake activating device is configured to activate the first activation element and the second activation element, simultaneously or in sequence, in response to a weight of the elevator car and a direction of movement of the elevator car.
8 more elements
Dependencies are inferred from the claim text.