Patent · US Expired

Single-blade impeller for centrifugal pumps

US5348444A · kind A · utility

8Cited by

5References

10Claims

0Family size

Assignee

KSB Aktiengesellschaft · DE

Inventors

Wolfgang Metzinger · Pegnitz, DE
Rolf Witzel · Bischofswerda, DE

Key dates

Filing date	Nov 12, 1992
Grant date	Sep 20, 1994
Priority date	—
Expiry date	Nov 12, 2012

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF04D29/245
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A centrifugal pump for conveying fluids with suspended solids has a single-blade impeller. The blade angle, as measured at the meridian line of the blade, is positive at the rear end of the blade and less than 0 degrees along a portion of the blade which extends from the front end towards the rear end of the blade through an angle of at least 90 degrees. The inner side of the blade defines a segment of a circle which is coextensive with this portion of the blade. The front end of the blade has a surface which bridges the inner and outer sides of the blade, and such surface is either flat or forms an arc having a radius of curvature substantially greater than half the blade thickness.

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