ALEXANDRIA, Va., Feb. 12 -- United States Patent no. 12,221,988, issued on Feb. 11, was assigned to Bumach Engineering International B.V. (TA Emmen, Netherlands).
"Working cylinder and method for the production thereof" was invented by Josef Bueter (Haren/Altenberge, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "A working cylinder has a cylinder with a cylinder tube, and a piston unit, The cylinder has a coupling portion which has a closure part and cylinder tube end portion that has a threaded cylinder tube portion, a cylinder tube intermediate portion and a cylinder tube end. The closure part has an external thread and the threaded cylinder tube portion has an internal thread corresponding to the ...