Patent · US Expired

Eccentric screw-type pump

US7040878B2 · kind B2 · utility

3Cited by

0References

16Claims

0Family size

Assignee

NETZSCH Mohnopumpen GmbH · DE

Inventors

Reinhard Denk · Dahme/Mark, DE
Bernhard Murrenhoff · Buchbach, DE
Christopher Martin Gwalchmai · Waldkraiburg, DE
Johann Kreidl · Waldkraiburg, DE

Key dates

Filing date	Feb 24, 2003
Grant date	May 9, 2006
Priority date	—
Expiry date	Feb 24, 2023

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF04C2/1073
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

An eccentric screw-type pump has a pump section with a tubular pump casing, a stator cladding and a pump cavity (30) configured in correspondence with a double-thread or multi-thread screw. A screw-type rotor is connected to a driving shaft via a flexible shaft. The flexible shaft is connected at its two ends via rigid coupler elements to the rotor and the driving shaft, and is surrounded by a preloaded coaxially disposed screw.

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