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:
Oct. 19, 2021
Filed:
Oct. 02, 2019
Ogura Clutch Co., Ltd., Gunma, JP;
Yasuo Kidena, Aichi-ken, JP;
Keita Nakashima, Aichi-ken, JP;
Takeshi Maeda, Aichi-ken, JP;
Motoi Kato, Gunma, JP;
Yoshihiro Kurosu, Gunma, JP;
Hiroyasu Onai, Gunma, JP;
Kosuke Murakami, Gunma, JP;
OGURA CLUTCH CO., LTD., Gunma, JP;
Abstract
An excitation operation brake includes a braking shaft, an armature that rotates integrally with the braking shaft, and a field core including a disc portion facing the armature. The disc portion includes an outer magnetic shielding portion and an inner magnetic shielding portion, which make a magnetic flux flowing through the disc portion bypass to the armature a plurality of times. The outer magnetic shielding portion includes a low-magnetic resistance path having a magnetic resistance smaller than the magnetic resistance of a magnetic path that bypasses to the armature.