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US5159271A
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Turbine having a rotor forming a nutation and precession movement
Assignee: Commissariat à l'Énergie Atomique et Aux Énergies Alternatives
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Filing: 1990-07-24
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Granted: 1992-10-27
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Expires: 2010-07-24
Abstract
Abstract Turbine for the analysis of samples by nuclear magnetic resonance. It comprises a rotor (7) having a spherical central core (8), whereof a cavity (9) contains the solid sample to be analyzed. Two conical surfaces are provided on either side of the central core (8) for rolling on two conical surfaces (13) of the stator. Blades are driven by a flow of compressed gas. This arrangement makes it possible to move the rotor (7) very rapidly, while respecting a constant ratio of the nutation and precession rotation speeds.
Inventors
- 👤 Antoine Llor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:49
CPC Classifications
G; G01; G01R; G01R33/00; G01R33/20; G01R33/28; G01R33/30
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
150 words
In a turbine for holding samples to be analyzed by nuclear magnetic resonance wherein the turbine comprises a stator, a rotor for holding the samples, said rotor being provided with driving means to be engaged by a driving gas, said rotor being also supported on gas bearings in the stator, and gas supply means for supplying the gas bearings and the rotor driving gas, the improvement wherein the rotor comprises a central core provided with a cavity for containing the sample to be analyzed and two generally conical coaxial rolling surfaces, there being one of said rolling surfaces on each side of the core, the stator comprising two generally conical bearing surfaces defining coaxial cones whose axis forms an acute angle with the axis of the conical coaxial rolling surfaces on the rotor, the rotor core having a surface constituted by a spherical portion in front of each gas bearing.
Claim 2
Dependent Claim
150 words
In a turbine for holding samples to be analyzed by nuclear magnetic resonance wherein the turbine comprises a stator, a rotor for holding the samples, said rotor being provided with driving means to be engaged by a driving gas, said rotor being also supported on gas bearings in the stator, and gas supply means for supplying the gas bearings and the rotor driving gas, the improvement wherein the rotor comprises a central core provided with a cavity for containing the sample to be analyzed and two generally conical coaxial rolling surfaces, there being one of said rolling surfaces on each side of the core, the stator comprising two generally conical bearing surfaces defining coaxial cones whose axis forms an acute angle with the axis of the conical coaxial rolling surfaces on the rotor, the rotor core having a surface constituted by a spherical portion in front of each gas bearing.
Claim 3
Dependent Claim
26 words
A turbine according to claim 1, characterized in that the rotor comprises two extending conical rollers, there being one roller on each side of the core.
Claim 4
Dependent Claim
30 words
A turbine according to claim 1, characterized in that the rotor is provided with two coaxial concavities, one on each side of the core, said concavities defining the rolling surfaces.
Claim 5
Dependent Claim
55 words
A turbine according to claim 2, characterized in that the bearings comprise an annular bearing constituted by blowing nozzles distributed over a circumference of the stator between the conical bearing surfaces on the stator and a bearing constituted by two blowing nozzles, each positioned along the axis of the conical bearing surfaces on the stator.
Claim 6
Dependent Claim
76 words
A turbine according to claim 4, characterized in that the core is constituted by two spherical cups each located in front of one of the blowing nozzles of the conical bearing surfaces on the stator and to each of which is connected a conical roller, as well as a truncated sphere joining the two spherical cups, said truncated sphere having a smaller diameter than said spherical cups and being positioned in front of the annular bearing.
Claim 7
Dependent Claim
17 words
A turbine according to claim 1, characterized in that the central core is at least partially spherical.
Claim 8
Dependent Claim
34 words
A turbine according to claim 1, characterized in that the cavity for containing the sample is a volume of revolution, whose axis coincides with the axis of the conical rolling surfaces on the rotor.
Claim 9
Dependent Claim
20 words
A turbine according to claim 6, characterized in that the core contains said samples symmetrically positioned around the sample cavity.
Claim 10
Dependent Claim
23 words
A turbine according to claim 2, characterized in that notches are located at the ends of the conical rollers opposite to the core.
Claim 11
Dependent Claim
18 words
A turbine according to claim 1, characterized in that the interior of the stator is under a vacuum.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-10-27 | 1996-04-27 | 1996-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-10-27 | 2000-04-27 | 2000-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-10-27 | 2004-04-27 | 2004-10-27 | $7700.00 | Window Closed / Lapsed |