ALEXANDRIA, Va., May 26 -- United States Patent no. 12,638,075, issued on May 26, was assigned to ZF FRIEDRICHSHAFEN AG (Friedrichshafen, Germany) and ZF WIND POWER ANTWERPEN N.V. (Lommel, Belgium).

"Transfer of lubricant into the interior of a hollow shaft" was invented by Wim De Laet (Antwerp, Belgium), Andy Maes (Sinaai, Belgium), Stijn Rottiers (Lokeren, Belgium), Quinten Gaethofs (Houthalen, Belgium) and Koen Krieckemans (Noorderwijk, Belgium).

According to the abstract* released by the U.S. Patent & Trademark Office: "An arrangement, including a gearbox housing, a hollow shaft rotatably mounted in the gearbox housing, and a lubrication point located at least partially inside the hollow shaft. The gearbox housing has a ring which enc...