Device for conversion of a unidirectional rotational motion into reciprocating back and forth motion and pump device comprising same

US6354814B1 · kind B1 · utility

Inventors

• Ralf Kaufmann · Walldürn, DE
• Christoph Nix · Aachen, DE
• Gunter Rau · Aachen, DE
• Helmut Reul · St. Blasien, DE

Key dates

• Filing date: Mar 24, 2000
• Grant date: Mar 12, 2002
• Expiry date: Mar 24, 2020

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T74/18056
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

The inventive device consists of a disk which can be rotated around a central axis, a wobble pin which is mounted in the disk so that can rotate around an axis which is arranged at an angle in relation to the plane, of said disk, a swivel pin which is secured to the wobble pin at an angle in relation to the axis thereof, and a fastening device which prevents the swivel pin from rotating around the axis of the disk. This mechanism forms a gear enabling a rotational unidirectional movement to be translated into a back-and-forth movement in applications where limited height is available. The preferred area of application is in implantable blood pumps.