ALEXANDRIA, Va., Nov. 11 -- United States Patent no. 12,467,497, issued on Nov. 11, was assigned to EJOT SE & Co. KG (Bad Berleburg, Germany).
"Spring head screw assembly" was invented by Ralph Joerg Hellmig (Bad Laasphe, Germany) and David Korn (Bad Laasphe, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "The invention relates to a spring head screw assembly (8) incorporating a spring head screw (10) having a head (12) with a conical skirt (14) that widens towards the free end of a threaded shank which adjoins the head (12), wherein the spring head screw assembly (8) has a washer (30) which is located between the skirt and the threaded part (20) of the shank (16) in an unthreaded part (18) of the sha...