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:
Apr. 14, 2026
Filed:
Jul. 07, 2025
Fositek Corporation, New Taipei City, TW;
Chun-Han Lin, New Taipei City, TW;
Yung-Chih Tseng, New Taipei City, TW;
Zoen Ryon Ryan Wong, New Taipei City, TW;
PO-Yun Chen, New Taipei City, TW;
FOSITEK CORPORATION, New Taipei City, TW;
Abstract
A roller screw bidirectional axial preloading structure includes a screw, a nut, and a plurality of first and second rollers arranged around the screw in an interleaved manner and respectively having two ends connected to a first and a second retainer. A first gap is formed between the first retainer and one end of each first roller, and a second gap is formed between the second retainer and the other end of each second roller, such that the first and the second gaps are axially spaced while circumferentially interleaved around the screw. Two elastic elements are located outside the first and second retainers to apply two forces, which are transmitted via the first and second retainers to the first and the second rollers to create two directionally opposite axial preloads on the first and second rollers, giving the roller screw good mechanical power transmission accuracy and stability in motion.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile