The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 10, 2023
Filed:
Sep. 16, 2020
Abiomed Europe Gmbh, Aachen, DE;
Thorsten Siess, Wuerselen, DE;
Frank Kirchhoff, Ubach-Palenberg, DE;
ABIOMED EUROPE GMBH, Aachen, DE;
Abstract
The invention relates to a micromotor (), the stator of which contains a back iron jacket (). 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 function. The reduced electric conductivity suppresses eddy currents to a great extent. The back iron jacket () has a high magnetic conductivity with a small wall thickness, thus increasing the electrical output for a motor with a small diameter.