The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 15, 2020
Filed:
Sep. 04, 2017
Kobelco Construction Machinery Co., Ltd., Hiroshima-shi, JP;
Kobe Steel, Ltd., Kobe-shi, JP;
Tetsuya Ogawa, Hyogo, JP;
Shintaroh Sasai, Hyogo, JP;
Koji Inoue, Kobe, JP;
Takashi Hiekata, Kobe, JP;
KOBELCO CONSTRUCTION MACHINERY CO., LTD., Hiroshima-shi, JP;
Kobe Steel, Ltd., Kobe-shi, JP;
Abstract
Provided is an electric winch apparatus capable of preventing irregular winding of a wire rope caused by landing of a hoisted-down suspended load. The electric winch apparatus includes a winch drum () around which a wire rope () is wound, an electric motor () which rotates the winch drum (), an operation lever (), a measurement unit () which measures a tension index value corresponding to a tension in the wire rope (), and a controller () which controls motion of the electric motor (). The controller () stops motion of the electric motor () when an operation in a lowering operation direction is applied the operation lever () and a tension average value as an average value of a tension in the wire rope () becomes less than or equal to a predetermined tension reference value, the average value of the tension corresponding to an average value of the tension index value in a predetermined period.