US Patent Issued on June 2 for "Method and system for detecting tightness state of bolt or nut" (Chinese, American Inventors)

ALEXANDRIA, Va., June 2 -- United States Patent no. 12,644,700, issued on June 2.

"Method and system for detecting tightness state of bolt or nut" was invented by Shuangwen Liu (Jiaxing, China), Lei Liu (San Ramon, Calif.), Bin Hu (Jiaxing, China), Zhuang Li (Jiaxing, China) and Wei Cao (Jiaxing, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "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 ...