ALEXANDRIA, Va., June 4 -- United States Patent no. 12,320,195, issued on June 3.
"Power auxiliary device for small-sized roller shade" was invented by Chih-Yung Wang (Taipei, Taiwan).
According to the abstract* released by the U.S. Patent & Trademark Office: "The invention provides a power auxiliary device for a small-sized roller shade, including a fixed assembly and a transmission assembly. The fixed assembly includes a fixed seat and an upper cover. The transmission assembly includes a power portion with a gear, a speed-changing portion including a big speed-changing gear engaged with the gear and a small speed-changing gear, a transmission portion having a first transmission gear engaged with the small speed-changing gear and a secon...