An adjustable force safety brake (100) is provided for use in an elevator system. The adjustable force safety brake (100) comprises a safety block (180), first and second braking elements (150, 160) housed in the safety block (180) and an electromagnet (170). The safety block (180) includes a channel (182) arranged to receive a guide rail (120) of an elevator system in use. The first braking element (160) is configured to move from an initial position into a position of engagement with the guide rail (120) received in the channel (182) to create a braking force, and the second braking element (150) is configured to create an additional braking force on the guide rail (120) when the first braking element (160) is in the position of engagement. The electromagnet (170) is operable to selectively produce a magnetic force which acts on the second braking element (150) in a sideways direction away from the channel (182) so as to reduce the additional braking force on the guide rail (120).


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    Title :

    ADJUSTABLE FORCE SAFETY BRAKES


    Additional title:

    SICHERHEITSBREMSEN MIT EINSTELLBARER BREMSKRAFT
    FREINS DE SÉCURITÉ AVEC FORCE DE FREIN RÉGLABLE


    Contributors:

    Publication date :

    2022-05-11


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B66B Aufzüge , ELEVATORS



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