DOR NMR sample spinner
US5325059A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 26, 1992 |
| Grant date | Jun 28, 1994 |
| Priority date | — |
| Expiry date | Mar 26, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/307
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An NMR DOR sample spinner includes an inner-rotor that is driven by a radial-inflow microturbine at each end, supported radially by anti-whirl air bearings, and supported axially by thrust bearings at each end thereof. The DOR spinner further comprises an outer-rotor that houses the inner-rotor bearing and drive nozzles such that the inner-rotor axis is inclined with respect to the axis of the outer-rotor at an angle of typically 30.56.degree.. The outer-rotor is driven by a radial-inflow microturbine at each end, supported radially on anti-whirl air bearings, and supported axially by thrust bearings at each end thereof. The outer-rotor further comprises ceramic bearing races at each end that hold the sample drive nozzles in place. The outer microturbines are screwed to the outer-rotor and hold the bearing races in place. Drive and bearing gas for the inner-rotor is supplied through slip-fit, precision axial tubes at each end of the outer-rotor. The rf magnetization coil surrounds the central region of the outer-rotor, and rf shield rings limit the axial extent of the rf magnetic field.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.