ALEXANDRIA, Va., Feb. 11 -- United States Patent no. 12,546,320, issued on Feb. 10, was assigned to Abiomed Europe GmbH (Aachen, Germany).
"Blood pump with micromotor" was invented by Thorsten Siess (Aachen, Germany) and Frank Kirchhoff (Aachen, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "The invention relates to a micromotor (10), the stator of which contains a back iron jacket (18). Said back iron jacket consists of a continuous unslotted sleeve consisting of a metal alloy that contains ferritic iron as the main constituent, up to 30% chromium and preferably aluminium and yttrium oxide. Electric conductivity is reduced by the oxidation of the aluminium. The yttrium oxide performs the same functi...