US Patent Issued to Guangzhou Jue Decoration Window Decoration Technology on May 26 for "Cordless roller shutter spring regulator" (Chinese Inventors)

ALEXANDRIA, Va., May 26 -- United States Patent no. 12,637,904, issued on May 26, was assigned to Guangzhou Jue Decoration Window Decoration Technology Co. Ltd (Guangzhou, China).

"Cordless roller shutter spring regulator" was invented by Yongzhong Qiu (Guangzhou, China) and Liwen Xu (Guangzhou, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present disclosure discloses a cordless roller shutter spring regulator, including a roller shutter spring pre-tightening force adjustment mechanism and a self-locking mechanism, wherein the self-locking mechanism is used to lock an adjustment shaft on the roller shutter spring pre-tightening force adjustment mechanism before an installation weight is installed...