X-ray tube rotor and stator assembly
US5875227A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 8, 1997 |
| Grant date | Feb 23, 1999 |
| Priority date | — |
| Expiry date | Sep 8, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J2235/1208
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An X-ray tube assembly having bearings rotatably connecting a rotor shaft and a stator. A pair of circumferential protrusions each radially extend from the shaft and are spaced apart a first radial distance from the stator. A substance, which includes metal (such as gallium) and which is liquid at the assembly's operating temperature, is located longitudinally between the circumferential protrusions. The substance radially extends a second radial distance between, and in conductive thermal contact with, the shaft and the stator. Preferably, the second radial distance is greater than fifty times the first radial distance, and the first radial distance is between twenty and sixty microns.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.