ALEXANDRIA, Va., Aug. 20 -- United States Patent no. 12,392,102, issued on Aug. 19, was assigned to BAUER Spezialtiefbau GmbH (Schrobenhausen, Germany).
"Construction machine, displacement tube and method for creating a filling material column in the ground" was invented by Michael Seifert (Barleben, Germany), Bernhard Karmann (Ehekirchen-Seiboldsdorf, Germany), Heiko Voigt (Dobeln, Germany) and Herbert Karl (Osterham, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "The invention relates to a construction machine for introducing a displacement tube into the ground, wherein the displacement tube comprises a tube base body and, at its lower end, a closure device which comprises at least one closure flap...