Linear drive and pump system, in particular an artificial heart

US8574291B2 · kind B2 · utility

Assignees

• Rheinisch-Westfälische Technische Hochschule (RWTH) Aachen · DE
• Herz-und Diabeteszentrum NRW · DE

Inventors

• Thomas Finocchiaro · Aachen, DE
• Thomas Butschen · Viersen, DE
• Marc Lessmann · Arnsberg, DE
• Kay Hameyer · Heverlee, BE
• Thomas Schmitz-Rode · Aachen, DE
• Ulrich Steinseifer · Hauset, BE
• Paul Barteld Kwant · Valkenburg, NL

Key dates

• Filing date: Aug 18, 2008
• Grant date: Nov 5, 2013
• Expiry date: Feb 12, 2030

Classification

• Technology area (CPC H): Electricity
• CPC primary: H02K1/27
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

The invention relates to an electrical linear drive, in particular for a pump system of an artificial heart, with a movable part and a stationary part, wherein the stationary part is formed by a permanent magnet arrangement and the movable part is formed by a coil arrangement, or vice versa, and wherein the coil arrangement and the permanent magnet arrangement can be moved to and fro relative to each other in an axial direction by means of current passed through the coil arrangement. The invention further relates to an electrical linear drive of this kind in which the permanent magnet arrangement is designed as a stack of frame-shaped, in particular ring-shaped magnets, which are magnetized alternately radially and axially in the axial direction, such that the magnetic field is strengthened on one side of the frame.