Eccentric screw-type pump with spare stator

US7104770B2 · kind B2 · utility

Assignee

• NETZSCH Mohnopumpen GmbH · DE

Inventors

• Helmut Bauer · Schreiber, CA
• Christoph Boehnisch · Munich, DE
• Reinhard Denk · Dahme/Mark, DE
• Matthias Gradl · Seßlach, DE
• Michael Groth · Hamburg, DE
• Guido Gutmann · Hechendorf, DE
• Guenther Hantschk · Taufkirchen, DE
• Siegfried Jarzina · Waldkraiburg, DE
• Franz Kneidl · Waldkraiburg, DE
• Johann Kreidl · Waldkraiburg, DE
• Robert Kurz · Aschheim, DE
• Franz Lachenwitzer · Waldkraiburg, DE
• Uwe Neumann · Coburg, DE
• Hansjuergen Linde · Coburg, DE
• Thomas Ribbe · Dahme/Mark, DE
• Michael Robby · Dahme/Mark, DE
• Karl-Heinz Rosner · Freudenstadt, DE
• Matthias Schaefer · Neustadt bei Coburg, DE
• Thomas Streubel · Waldkraiburg, DE
• Alfred Thumser · Aschau, DE

Key dates

• Filing date: Sep 22, 2003
• Grant date: Sep 12, 2006
• Expiry date: Apr 28, 2024

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F04C2/1075
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

The present invention relates to the arrangement of a stator and a spare stator. In order to avoid a permanent correction in the length of the driving shaft, the spare stator is connected to the instantaneously operated stator or is configured in a single piece. Upon occurrence of a defined amount of wear, this stator combination is merely reversed through 180° relative to the longitudinal axis or an intermediate tube is inserted so that the spare stator arrives in the rotor region.