Gear wheel pump

US9004890B2 · kind B2 · utility

Assignees

• Oerlikon Textile GmbH & Co. KG · DE
• Durr Systems, Inc. · US

Inventors

• Arkadiusz Tomzik · Bensberg, DE
• Ulrich Helbing · Burscheid, DE
• Dietrich Witzler · Rommerskirchen, DE
• Michael Baumann · Herrenberg, DE
• Frank Herre · Oberriexingen, DE
• Martin Stiegler · Uhingen, DE
• Herbert Martin · Waiblingen, DE
• Thomas Appel · Bönnigheim, DE

Key dates

• Filing date: Mar 11, 2008
• Grant date: Apr 14, 2015
• Expiry date: Oct 14, 2031

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F04C15/0038
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

The invention relates to a gear wheel pump with two meshing gear wheels which are rotatably mounted within a pump housing by means of a driven driveshaft and a crankshaft journal and which form a pumping channel system between a pump inlet and a pump outlet. Several gaps are formed between the pump housing, the gear wheels, the driveshaft, and the crankshaft journal. One of the gaps between the driveshaft and one of the gear wheels contains means for the rotationally fixed connection of the driveshaft to the gear wheel. In order to prevent leakages penetrating to the connecting means, according to the invention the gap between the driveshaft and the gear wheel is sealed, with respect to the front faces of the gear wheel, by means of a sealant.