ALEXANDRIA, Va., Feb. 24 -- United States Patent no. 12,560,227, issued on Feb. 24, was assigned to SFS Group International AG (Heerbrugg, Switzerland).
"Ball screw drive" was invented by Marijo Zach (Widnau, Switzerland), Jasmin Hanselmann (Altstatten, Switzerland), Alexander Christoph Staudigl (Bezau, Austria) and Ralph Sieber (Diepoldsau, Switzerland).
According to the abstract* released by the U.S. Patent & Trademark Office: "A ball screw drive having a threaded spindle and a spindle nut enclosing the spindle coaxially. At least two radially outwardly open channels are oriented axially in parallel and are simultaneously pressed into the lateral surface, the channels open toward a common front face of the spindle nut. Balls circulate i...