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. 03, 2019
Filed:
Oct. 07, 2016
Kobe Steel, Ltd., Kobe-shi, JP;
Kobelco Construction Machinery Co., Ltd., Hiroshima-shi, JP;
Takashi Hiekata, Kobe, JP;
Koji Inoue, Kobe, JP;
Hiroaki Kawai, Kobe, JP;
Shintaroh Sasai, Hyogo, JP;
Tetsuya Ogawa, Hyogo, JP;
Toshiro Yamashita, Hyogo, JP;
Kobe Steel, Ltd., Kobe-shi, JP;
KOBELCO CONSTRUCTION MACHINERY CO., LTD., Hiroshima-shi, JP;
Abstract
An electrically driven winch device includes a winch drum, a plurality of axial-gap electric motors, and a drive shaft. The winch drum rotates around a drum axis in order to wind or unwind a work rope. The plurality of electric motors are electric motors configured to drive the winch drum to rotate, and are each provided with a stator, and rotors which rotate around a rotation axis and are disposed at an axial distance from the stator. The drive shaft is disposed coaxially with the drum axis and serially connects the rotors of the plurality of electric motors on the rotation axis.