US Patent Issued to YIH CHENG FACTORY on June 30 for "Screwdriver bit coupling structure of hand tool" (Taiwanese Inventor)

ALEXANDRIA, Va., July 16 -- United States Patent no. 12,667,944, issued on June 30, was assigned to YIH CHENG FACTORY Co. LTD. (Nantuo, Taiwan).

"Screwdriver bit coupling structure of hand tool" was invented by Wei-Cheng Chen (Nantuo, Taiwan).

According to the abstract* released by the U.S. Patent & Trademark Office: "This disclosure is directed to a screwdriver bit coupling structure (1) having a screwdriver base (20) and a ring plug (30). The screwdriver base (20) includes a fixing base (21) and a fixing cylinder (22). The fixing cylinder (22) includes an embedding recess (221) and an engaging recess (222). The fixing cylinder (22) has an outer end edge (223). The ring plug (30) includes an elastic segment (31) and an abutting segment (...