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US Patent 7992688 Door device for an elevator

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Patent
Patent

Patent attributes

Patent Jurisdiction
United States Patent and Trademark Office
United States Patent and Trademark Office
Patent Number
7992688
Date of Patent
August 9, 2011
Patent Application Number
12293445
Date Filed
May 29, 2006
Patent Primary Examiner
‌
Anthony Salata
Patent abstract

A door device for an elevator includes an elevator door, first and second door drive devices having first and second rotating shafts, respectively, a power transmission mechanism that moves the elevator door according to rotation of the first and second rotating shafts, and a door control device that controls movement of the elevator door. The door control device includes a first processing device that performs first arithmetic processing for controlling the first door drive device, a second processing device that performs second arithmetic processing for controlling the second door drive device, and an information transmitting unit for information transmission between the first and second processing devices.

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