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. 28, 2025
Filed:
Oct. 07, 2024
Primax Electronics Ltd., Taipei, TW;
Tsung-Wen Hsueh, Taipei, TW;
Chun-Che Wu, Taipei, TW;
Chien-Pang Chien, Taipei, TW;
Sheng-An Tsai, Taipei, TW;
Kai-Wen Lee, Taipei, TW;
Li-Kuei Cheng, Taipei, TW;
Heng-Tseng Liao, Taipei, TW;
Primax Electronics Ltd., Taipei, TW;
Abstract
A roller module includes a wheel disc, a magnetic conductor and an electro-permanent magnet assembly. The wheel disc is rotatable along a rotation axis line. The magnetic conductor is coaxially arranged and synchronously rotated with the wheel disc. The magnetic conductor includes a hub and plural spokes. The plural spokes are radially extended from the hub. The magnetic conductor is arranged between the wheel disc and the electro-permanent magnet assembly. When the electro-permanent magnet assembly is operated in the first operating status, the electro-permanent magnet assembly provides a first magnetic attraction force to at least one spoke in the axial direction. When the electro-permanent magnet assembly is operated in the second operating status, the electro-permanent magnet assembly provides a second magnetic attraction force to at least one spoke in the axial direction. The first magnetic attraction force is greater than the second magnetic attraction force.