US Patent 7178635 Elevator control having independent safety circuits

Patent 7178635 was granted and assigned to Thyssenkrupp Elevator on February, 2007 by the United States Patent and Trademark Office.

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Is a

Patent

Patent attributes

Current Assignee

Thyssenkrupp Elevator

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

7178635

Date of Patent

February 20, 2007

Patent Application Number

11258594

Date Filed

October 24, 2005

Patent Primary Examiner

‌

Jonathan Salata

Patent abstract

An elevator installation with at least one shaft having a plurality of shaft doors is provided. At least two cars disposed one above the other travel up and down in the shaft. Each car has at least one car door. A safety device is provided for blocking the travel of the cars when the shaft doors or car doors are open. The safety device has at least two independent safety circuits, each having at least one shaft door and/or car door associated with it. Travel of at least one car can be blocked by means of the safety circuits.