Pump with shaftless impeller
US4806080A · kind A · utility
137Cited by
17References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 13, 1987 |
| Grant date | Feb 21, 1989 |
| Priority date | — |
| Expiry date | Feb 13, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S384/913
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A pump including an impeller having a magnet or a second conductor therein, the impeller being adapted to be directly rotated by virtue of magnetic fields of stator coils. The impeller is rotated within a casing in close proximity thereto via ceramic bearing members, one bearing member having spiral grooves on its slide surface. The ceramic bearing members constitute a dynamic pressure bearing means.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.