US Patent 7938231 Elevator apparatus having independent second brake control
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Patent abstract
In an elevator apparatus, a brake control device has a first brake control portion for operating a brake device upon detection of an abnormality to stop a car as an emergency measure, and a second brake control portion for reducing a braking force of the brake device when a degree of deceleration of the car becomes equal to or higher than a predetermined value at a time of emergency braking operation of the first brake control portion. The second brake control portion detects emergency braking operation of the brake device independently of the first brake control portion.
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Patent Inventor Names
Hiroshi Kigawa0
Rikio Kondo0
Takaharu Ueda0
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US Patent 07938231 Elevator apparatus having independent second brake control US Patent 7938231 Elevator apparatus having independent second brake control
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Patent Number
079382310
Patent Number
79382310
Edits on 29 Apr, 2023
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Is a
Patent Jurisdiction
Patent Number
079382310
Date of Patent
May 10, 2011
0Patent Application Number
120643940
Date Filed
July 27, 2006
0Patent Primary Examiner
Edits on 7 Dec, 2021
Golden AI
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US Patent 07938231 Elevator apparatus having independent second brake control
Infobox
Is a
Patent jurisdiction
Patent number
07938231
Date of patent
May 10, 2011
Patent application number
12064394
Date Filed
July 27, 2006
Patent primary examiner
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