US Patent Issued to MARTiN GMBH FUR UMWELT-UND ENERGiETECHNiK on April 7 for "Labyrinth seal arrangement" (German Inventors)

ALEXANDRIA, Va., April 7 -- United States Patent no. 12,595,851, issued on April 7, was assigned to MARTiN GMBH FUR UMWELT-UND ENERGiETECHNiK (Munich).

"Labyrinth seal arrangement" was invented by Johannes Ulrich Martin (Munich) and Christian Frei (Ampfing, Germany).

According to the abstract* released by the U.S. Patent & Trademark Office: "An exemplary seal arrangement includes a labyrinth seal (1). The seal is in operative engagement with a shaft (2) that extends in an opening (3) in a wall (4) bounding a riddlings hopper (13). The exemplary shaft moves along at least one radial direction on an orbital or eccentric path within the wall opening so as to suitably cause movement of at least one grate step of a firing grate. First seal dis...