Back to results
US 8,123,002 B2Granted
Elevator rope positioning apparatus
AssigneeThyssenKrupp Elevator Capital Corporation
InventorsRory S. Smith, Stefan Kaczmarczyk, Jim Nickerson, Patrick M. Bass
Life of this patent
Estimating the term…
Abstract
A system and method for minimizing compensation rope sway by altering the natural frequency of compensation ropes using servo actuators. The rope sway may be minimized by moving the compensation sheave to adjust the tension of the compensation rope or adjusting the position of the termination of a compensation rope to account for changes in the position of a structure. Servo actuators may also be used to re-level the elevator car to account for rope stretch.
Claims10
An elevator system comprising:
- (a) an elevator car;
- (b) a counter weight;
- (c) a compensation rope, the compensation rope being affixed at a first end to the elevator car and at a second end to the counterweight;
- (d) a moveable compensation sheave, the compensation rope being wrapped around the compensation sheave;
- (e) a servo actuator, wherein the servo actuator adjusts the position of the moveable compensation sheave;
- and
- (f) a controller, wherein the controller compares the natural frequency of the building structure and the natural frequency of the compensation rope and directs the servo actuator to adjust the position of the moveable compensation sheave if the compared frequencies are substantially similar.
4 more elements
An elevator system comprising:
- (a) an elevator car;
- (b) a first moveable carriage connected with a bottom surface of the elevator car;
- (c) a first servo actuator, wherein the first servo actuator adjusts the position of the first moveable carriage;
- (d) a counter weight;
- (e) a compensation rope, the compensation rope being affixed at a first end to the first moveable carriage and at a second end to the counterweight;
- (f) a compensation sheave, the compensation rope being wrapped around the compensation sheave;
- and
- (g) a controller, wherein the controller directs the first servo actuator to adjust the position of the first moveable carriage to correspondingly adjust the position of the compensation rope.
5 more elements
Dependencies are inferred from the claim text.