ALEXANDRIA, Va., April 9 -- United States Patent no. 12,270,177, issued on April 8, was assigned to Foundiz B.V. (Etten-Leur, Netherlands).
"Pile driving apparatus" was invented by Peter Hendrik Van Der Schaaf (Etten-Leur, Netherlands) and Arjen Hans Van Der Schaaf (Etten-Leur, Netherlands).
According to the abstract* released by the U.S. Patent & Trademark Office: "A pile driving apparatus and method for driving a pile into ground. The apparatus includes a vertical guide mast, a support carriage displaceable along the mast, a vibration hammer, a rotator coupling and a tilt coupling connected between the support carriage and the vibration hammer. The vibration hammer includes first clamping means arranged at the side of a hammer main body...