Patent · US Active

Eccentric screw pump having conical sealing surfaces

US7618246B2 · kind B2 · utility

1Cited by

2References

9Claims

0Family size

Assignee

NETZSCH Mohnopumpen GmbH · DE

Inventors

Herbert Frisch · Wien, AT
Franz Lachenwitzer · Waldkraiburg, DE
Michael Robby · Dahme/Mark, DE

Key dates

Filing date	Feb 7, 2007
Grant date	Nov 17, 2009
Priority date	—
Expiry date	Aug 16, 2027

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF04C2240/30
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

The aim of the invention is to improve the sealing possibilities between the elastic stator lining and corresponding connecting flanges of eccentric screw pumps. In order to increase the sealing surfaces, the stator lining comprises, at least at one of its ends, a conical sealing surface which may be provided with one or more prominent or recessed parts.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.