Brake device for an elevator with monitoring capabilities

Details Brake device for an elevator with monitoring capabilities Brake device for an elevator with monitoring capabilities

2011-03-22

2011-03-22

Salata, Jonathan (Department: 2837)

Elevator, industrial lift truck, or stationary lift for vehicle

With monitoring, signalling, and indicating means

Monitors operational parameter

C188S00111E

Reexamination Certificate

active

07909145

ABSTRACT:
An elevator drive has a brake device with compression springs to actuate brake levers, and brake linings on a brake drum creating a braking force. A sensor is provided to detect the movement of a brake magnet armature tappet. A bracket is attached to the brake magnet tappet on one end and a distance piece carrying the sensor housing is arranged on the other end. A restoring lug is attached to the existing mechanical indicator. A monitor evaluates the sensor signal and turns off the elevator drive in the event of dangerous operational states via a safety circuit. The system allows the state of the brake device to be monitored. The more the brake linings wear off due to abrasion, the smaller the distance between the armature and the brake magnet housing. If the armature is in contact with the brake magnet housing, the braking ability of the brake linings is completely void.

REFERENCES:
patent: 4984659 (1991-01-01), Nomura
patent: 7398863 (2008-07-01), Liebetrau et al.
patent: 2008/0128218 (2008-06-01), Gremaud et al.
patent: 2008/0308360 (2008-12-01), Weinberger et al.
patent: 05193858 (1993-08-01), None

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