Method and system for detecting and stopping uncontrolled...

Details Method and system for detecting and stopping uncontrolled... Method and system for detecting and stopping uncontrolled...

2008-12-19

2009-11-17

Salata, Jonathan (Department: 2837)

Elevator, industrial lift truck, or stationary lift for vehicle

With monitoring, signalling, and indicating means

C187S288000, C187S305000, C187S361000

Reexamination Certificate

active

07617911

ABSTRACT:
Method and system for detecting and stopping uncontrolled movement of the car (1) in an elevator. In the method movement of the car is detected with the first movement detection means (2, 3, 4, 5, 6) when the brake (8) of the drive machinery (7) is in the braking status with the purpose of holding the car in its position without moving. A first control signal is formed if the car moves in the aforementioned situation. Movement of the car is stopped on the basis of the first control signal with a separate stopping appliance (9) with respect to the brake of the drive machinery. The operating condition of the first movement detection means are tested with the second movement detection means (10, 11, 12) during driving of the car in order to detect a fault situation. A second control signal is formed for the elevator control when a fault situation is detected, in which case the elevator control drives the car to the next stopping floor and prevents the subsequent run of the car.

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