Method of stopping conveying equipment for persons

Details Method of stopping conveying equipment for persons Method of stopping conveying equipment for persons

2005-05-24

2005-05-24

Bidwell, James R. (Department: 3651)

Conveyors: power-driven

Conveyor or accessory therefor specialized to convey people

With means to control the operation of the section

C198S322000

Reexamination Certificate

active

06896119

ABSTRACT:
The invention relates to a method for stopping conveying equipment for persons of the type that includes a drive motor, a frequency converter for controlling motor operation, and a holding brake. On activation of a safety element a the frequency converter decreases the speed of the drive motor according to a pre-established braking ramp, the holding brake being activated before standstill of the conveying equipment. Operational safety of the braking system is thus increased.

REFERENCES:
patent: 4139810 (1979-02-01), Ueki et al.
patent: 4588065 (1986-05-01), Maiden et al.
patent: 5337878 (1994-08-01), Mehlert et al.
patent: 6267219 (2001-07-01), Spannhake et al.
patent: 6273234 (2001-08-01), Balzer-Apke et al.
patent: 2 464 912 (1981-03-01), None
patent: 2156173 (1985-10-01), None

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