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:
May. 07, 2019
Filed:
Jul. 28, 2017
Fanuc Corporation, Yamanashi, JP;
Katsuya Ono, Yamanashi, JP;
Fanuc Corporation, Yamanashi, JP;
Abstract
A coil bobbin and a brake core are secured to each other readily and more tightly. Provided is an electromagnetic brake including an annular coil bobbin around which an excitation coil is wound, a brake core having an annular recess that accommodates the coil bobbin, and an armature driven by an electromagnetic force generated by the excitation coil. An inner surface of a center hole in the coil bobbin is provided with inner protrusions that protrude radially inward from a plurality of locations at intervals in a circumferential direction and that are pressed onto an outer peripheral surface of a columnar central projection included in the recess when the coil bobbin is press-fitted to the recess of the brake core. The inner protrusions are disposed substantially along the entire length of the coil bobbin in an axial direction thereof.