Patent · US Expired

Rotodynamic pump with spherical motor

US4352646A · kind A · utility

24Cited by

7References

2Claims

0Family size

Inventors

Ingeborg Laing · Waiblingen, DE
Nikolaus Laing · Spaichingen, DE

Key dates

Filing date	Feb 27, 1981
Grant date	Oct 5, 1982
Priority date	—
Expiry date	Feb 27, 2001

Classification

Technology area (CPC H)Electricity
CPC primaryH02K1/12
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A pump-motor unit of the type having an impeller connected to an armature and where the armature is separated from a stator by an air gap. The armature comprises a magnetic material having sufficient residual flux density whereby when the torque load on the impeller-armature structure is low, the magnet will act as a permanent magnet to provide synchronous rotation of the armature with respect to magnetic flux generated by the stator and when the torque load on the impeller-armature structure is high, will allow magnetic reversal whereby the armature will rotate asynchronously with respect to the magnetic flux generated by the stator.

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