Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Takuya Uemura0
Hiroki Yamamoto0
Kazumasa Teramoto0
Yasuhiko Takeuchi0
Date of Patent
April 11, 2017
0Patent Application Number
143486750
Date Filed
October 31, 2013
0Patent Citations Received
Patent Primary Examiner
Patent abstract
A restraining roller of a hook winch has a roller middle part and first and second roller end parts. The roller middle part is formed in a columnar shape. Each of the first and second roller end parts is formed in a roughly circular truncated cone shape. The widths of the first and second roller end parts are greater than the diameter of a wire rope. A difference in diameter between an inner end and outer end of each of the first and second roller end parts is less than the diameter of the wire rope. Taper angles of the first and second roller end parts are different from each other.
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