Lift cable slack monitoring device and method

Details Lift cable slack monitoring device and method Lift cable slack monitoring device and method

2011-04-19

2011-04-19

Salata, Jonathan (Department: 2837)

Elevator, industrial lift truck, or stationary lift for vehicle

With monitoring, signalling, and indicating means

Monitors operational parameter

Reexamination Certificate

active

07926622

ABSTRACT:
A lift drive unit has at least one monitoring device for monitoring unallowed raising of a lift cage. The drive unit has a motor unit and a deflecting unit. If a counterweight supported by the deflecting unit, for example rests on a shaft pit buffer, the deflecting unit is unloaded and is raised by way of a spring element of the monitoring device. A sensor of the monitoring device detects the movement of the deflecting unit and switches off the motor of the drive unit via a safety circuit.

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