Patent · US Expired

Centrifugal pump impeller with a low specific speed of rotation

US5257910A · kind A · utility

2Cited by

5References

13Claims

0Family size

Assignee

KSB Aktiengesellschaft · DE

Inventors

Peter Hergt · Ludwigshafen, DE
Alexander Nicklas · Dirmstein, DE
Salvatore Scianna · Bad Dürkheim, DE

Key dates

Filing date	Jun 20, 1991
Grant date	Nov 2, 1993
Priority date	—
Expiry date	Jun 20, 2011

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF04D29/2222
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

An impeller for a centrifugal pump has an axis of rotation. The impeller includes a pair of covers which cooperate to define a chamber, and blades in the chamber defining generally radial flow channels. Each of the covers has a wall which is oriented transverse to the axis of rotation. The walls are provided with cutouts at the periphery of the impeller and one cutout is associated with each flow channel. The radial lengths of the cutouts are equal to or less than one-half the lengths of the flow channels. Each flow channel and its respective cutout cooperate to define an aperture which opens to the exterior of the chamber both axially and radially.

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