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:
Jun. 02, 2026
Filed:
Sep. 24, 2019
Zhejiang Future Technology Institute (Jiaxing), Jiaxing, CN;
Shuangwen Liu, Jiaxing, CN;
Lei Liu, San Ramon, CA (US);
Bin Hu, Jiaxing, CN;
Zhuang Li, Jiaxing, CN;
Wei Cao, Jiaxing, CN;
Abstract
The present invention discloses methods and systems for detecting the tightness state of a bolt or nut under inspection. A sensor is mounted on the bolt or nut. Another sensor is mounted on a structure. A first angle of the bolt or nut is calculated. A second angle of the structure is calculated. The initial angle difference between the first and second angles is calculated when the bolt or nut is tight. A subsequent angle difference between the first and second angles is calculated during the inspection. Using the initial angle difference and the subsequent angle difference, the screwed-out angle of the bolt or nut is obtained. Then, the tightness state of the bolt or nut is determined based on the screwed-out angle.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile