Method of fabricating a wet-rotor circulator and circulator produced thereby
US4404483A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 26, 1981 |
| Grant date | Sep 13, 1983 |
| Priority date | — |
| Expiry date | Feb 26, 2001 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K15/14
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A wet-rotor circulator in accordance with the present invention includes a drive motor coupled to the impeller of a fluid pump. The drive motor includes a rotor assembly enclosed within a fluid impermeable jacket and a stator assembly for driving the rotor. The rotor is coaxially supported within the jacket by bearings which are permanently secured in place by circumferentially crimping sections of the jacket radially inwardly to shape-lock the bearings to the jacket. The crimping takes place during an assembly step in which an applied magnetic field causes substantially instantaneous deformation of the jacket without disturbing the coaxial relationship between the rotor shaft and its support bearings.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.