Elevator arrangement

Details Elevator arrangement Elevator arrangement

2007-05-29

2007-05-29

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

11451543

ABSTRACT:
The present invention relates to a method and a system for testing the condition of the brakes of an elevator. In the method, a test weight is set to apply to the drive machine of the elevator, by means of which weight a first torque required for driving the elevator car in the upward direction is measured. At least one of the brakes of the elevator is closed. Next, the empty elevator car is driven in the upward direction with the force of the aforesaid first torque and a check is carried out to detect movement of the elevator car. If a movement of the elevator car is detected, then the aforesaid at least one brake of the elevator is regarded as defective. The method of the present invention makes it possible to check the operativeness of the brakes of the elevator without separate maintenance visits.

REFERENCES:
patent: 3838891 (1974-10-01), Hamelin
patent: 4002973 (1977-01-01), Wiesendanger et al.
patent: 4627518 (1986-12-01), Meguerdichian
patent: 5233139 (1993-08-01), Hofmann
patent: 5578801 (1996-11-01), Hofmann
patent: 6325179 (2001-12-01), Barreiro et al.
patent: 7004289 (2006-02-01), Shrum et al.
patent: 42 17 587 (1993-06-01), None
patent: 44 44 466 (1996-04-01), None
patent: 0 338 777 (1989-10-01), None

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