Patent · US Expired

Fluid pump having a pressure sealed motor chamber

US5478222A · kind A · utility

72Cited by

8References

22Claims

0Family size

Inventors

Gotz Heidelberg · Starnberg, DE
Peter Ehrhart · Birkenfeld, DE
Otto Stuckmann · Recklinghausen, DE
Roland Fischer · Trostberg, DE

Key dates

Filing date	Feb 23, 1994
Grant date	Dec 26, 1995
Priority date	—
Expiry date	Feb 23, 2014

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF05D2260/6022
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A pump of compact design, which is hermetically sealed to the outside and has no shaft lead-outs to the outside, includes a housing with an internal partition dividing the inside of the housing into a drive section and a pump section. A single shaft, which is supported in the partition, carries on one side the rotor of an electric drive motor and on the other side the impeller of the pump. In the cavity of the drive section, a gas pressure is generated which assists in preventing the pumping material from passing into the drive section.

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