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:
Aug. 26, 2025
Filed:
Oct. 18, 2022
Alps Alpine Co., Ltd., Tokyo, JP;
Asuka Koike, Miyagi, JP;
Shigeru Furuki, Tokyo, JP;
ALPS ALPINE CO., LTD., Tokyo, JP;
Abstract
An electromagnetic brake device includes an armature rotatably supported about a rotational axis; a yoke including a groove, an inner cylinder portion, and an outer cylinder portion; and a coil arranged in the groove and configured to generate a magnetic force when energized and thereby attract the armature to the yoke. A first opposing surface of the armature facing the yoke includes a sliding surface configured to slide on the outer cylinder portion of the yoke, and a recessed portion disposed inward of the sliding surface in a radial direction and recessed in a direction away from the yoke. An inner perimeter area of a second opposing surface of the outer cylinder portion of the yoke and a third opposing surface of the inner cylinder portion of the yoke face the recessed portion of the armature and do not contact the first opposing surface of the armature.