Patents Represented by Attorney Buizel Long

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  • Method of contactlessly monitoring elevator shaft doors
    Patent number: 6945363
    Abstract: A method for monitoring shaft doors of a elevator installation uses at least one contactlessly acting shaft door monitoring sensor to emit a beam of electromagnetic waves, wherein at least during specific detection phases the beam extends over several floors and is detected by a receiver. The beam is influenced by a shaft door panel not being completely closed and/or a shaft door lock not being disposed in the locking setting such that a disturbance signal is generated to the elevator control.
    Type: Grant
    Filed: May 2, 2003
    Date of Patent: September 20, 2005
    Assignee: Inventio AG
    Inventors: Philipp Angst, Urs Baumgartner