Crane

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 9796564
SERIAL NO

15055721

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Importance

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Abstract

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A crane includes an overload safety device and a identifying unit. The overload safety device includes a maximum-load calculating unit configured to calculate a maximum load that a winch drum is capable of winding up with driving torques output from the remaining electric motors other than a failed electric motor identified by the identifying unit, an updating unit configured to update a set hoisting ability value stored in a storing unit to a value equal to the maximum load, and a control unit configured to cause the remaining electric motors to operate when a value of a load derived by a load deriving unit is equal to or smaller than a latest set hoisting ability value stored in the storing unit and stop the operation of the plurality of electric motors when the value of the load derived by the load deriving unit exceeds the latest set hoisting ability value.

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Patent Owner(s)

Patent OwnerAddress
KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL LTD )2-4 WAKINOHAMA-KAIGANDORI 2-CHOME CHUO-KU KOBE-SHI HYOGO 6518585 ?6518585
KOBELCO CRANES CO LTD17-1 HIGASHIGOTANDA 2-CHOME SHINAGAWA-KU TOKYO 141-8626

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hiekata, Takashi Kobe, JP 26 206
Inoue, Koji Kobe, JP 150 1559
Kawai, Hiroaki Kobe, JP 79 815
Ogawa, Tetsuya Hyogo, JP 147 1206
Sasai, Shintaro Hyogo, JP 15 89
Shimomura, Koichi Tokyo, JP 23 142
Yamashita, Toshiro Hyogo, JP 22 262

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