EP0073667A2
Expired / Lapsed
EP
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Sample spinner for nuclear magnetic resonance spectrometer
Assignee: Monsanto Co
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Filing: 1982-08-27
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Granted: —
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Expires: 2002-08-27
Abstract
Abstract A sample spinner for a nuclear magnetic resonance spectrometer having improved operating characteristics is described comprising a rotor supported at both ends by support gas bearings and positioned by a thrust gas bearing. Improved support gas bearings are also described which result in a spinner exhibiting long-term stable operation characteristics.
Inventors
- 👤 Edward Otto Stejskal
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 14:00
CPC Classifications
G; G01; G01R; G01R33/00; G01R33/20; G01R33/28; G01R33/30; G01R33/307; Y; Y10; Y10S; Y10S505/00; Y10S505/825; Y10S505/842; Y10S505/843; Y10S505/844
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
126 words
A NMR spectrometer sample spinner comprising a stator and a gas-driven rotor having a center cavity adapted to hold a sample, which stator and rotor contain a gas turbine portion, support gas bearing portions, and a thrust gas bearing portion, said stator having a chamber to accommodate the rotor and gas-carrying channels for feeding gas to the gas turbine portion, the support gas bearing portions and the thrust gas bearing portion, said rotor comprising a cylindrical body which operatively fits the stator chamber and contains a plurality of flutes radially positioned around the outside surface of the body opposite the turbine drive gas channel of the stator, which rotor is supported at both ends by support gas bearings and is positioned by a thrust gas bearing.
Claim 2
Dependent Claim
126 words
A NMR spectrometer sample spinner comprising a stator and a gas-driven rotor having a center cavity adapted to hold a sample, which stator and rotor contain a gas turbine portion, support gas bearing portions, and a thrust gas bearing portion, said stator having a chamber to accommodate the rotor and gas-carrying channels for feeding gas to the gas turbine portion, the support gas bearing portions and the thrust gas bearing portion, said rotor comprising a cylindrical body which operatively fits the stator chamber and contains a plurality of flutes radially positioned around the outside surface of the body opposite the turbine drive gas channel of the stator, which rotor is supported at both ends by support gas bearings and is positioned by a thrust gas bearing.
Claim 3
Dependent Claim
44 words
The spinner of Claim 1 in which the thrust gas bearing comprises a gas stream fed through an orifice essentially centered on the rotor axis and impinging against a rotor plate member which member lies in a plane essentially normal to the rotor axis.
Claim 4
Dependent Claim
40 words
The spinner of Claim 2 in which the support gas bearings comprise a gas stream fed through a plurality of orifices radially positioned around the inside surface of the stator body and impinging against the outside surface of the rotor.
Claim 5
Dependent Claim
28 words
The spinner of Claim 3 in which the support gas bearing portions comprise an inner race on the rotor and opposite therefrom an outer race on the stator.
Claim 6
Dependent Claim
22 words
The spinner of Claim 4 in which the inner and outer races are replaceable and are made from non-magnetic abrasion resistant material.
Claim 7
Dependent Claim
14 words
The spinner of Claim 5 in which the inner race reinforces the rotor body.
Claim 8
Dependent Claim
14 words
The spinner of Claim 6 in which the rotor body is made from poiy(chlorotrifluoroethylene).
Claim 9
Dependent Claim
22 words
The spinner of Claim 7 in which the inner races of the support gas bearings are made from graphite-filled polyimide or poly(oxymethylene).
Claim 10
Dependent Claim
29 words
The spinner of Claim 5 in which the area of the orifices of the other race are larger than the area of the gas-carrying channels which feed the orifices.
Claim 11
Dependent Claim
34 words
The spinner of Claim 9 in which the inner race is made of polymeric material and the outer race is made of electrically-conductive metal effectively shielding the nuclear magnetic resonance of said polymeric material.
References Cited (Backward Citations)
No citation records indexed.
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