Electricity: measuring and testing – Particle precession resonance – Using a nuclear resonance spectrometer system
Reexamination Certificate
2007-07-19
2009-06-02
Shrivastav, Brij B (Department: 2831)
Electricity: measuring and testing
Particle precession resonance
Using a nuclear resonance spectrometer system
C324S309000
Reexamination Certificate
active
07541807
ABSTRACT:
A rotor drive apparatus includes a rotor and a stator. The stator has a gas injection orifice located on the axis about which the rotor spins. The gas injection orifice communicates with a bearing gap formed between a tapered surface of the rotor and an axially spaced tapered surface of the stator. A gas is flowed from the gas injection orifice through the bearing gap, thereby establishing a center-fed, radial-outflow gas bearing supporting the rotor during rotation. In one implementation, a separate flow of drive gas is fed to drive flutes of the rotor to drive rotation. In another implementation, the center-fed, radial-outflow gas flow is additionally utilized to impinge against the drive flutes to actuate the rotation.
REFERENCES:
patent: 4201941 (1980-05-01), Fyfe et al.
patent: 4254373 (1981-03-01), Lippman et al.
patent: 4275350 (1981-06-01), Hill et al.
patent: 4446430 (1984-05-01), Stejskal
patent: 4456882 (1984-06-01), Doty
patent: 4511841 (1985-04-01), Bartuska et al.
patent: 4739270 (1988-04-01), Daugaard et al.
patent: 4899111 (1990-02-01), Pines et al.
patent: 4940942 (1990-07-01), Bartuska et al.
patent: 5202633 (1993-04-01), Doty et al.
patent: 5289130 (1994-02-01), Doty
patent: 5298864 (1994-03-01), Müller et al.
patent: 5325059 (1994-06-01), Doty
patent: 5333994 (1994-08-01), Doty et al.
patent: 5508615 (1996-04-01), Doty et al.
patent: 5605440 (1997-02-01), Bocoviz et al.
patent: 6320384 (2001-11-01), Doty et al.
patent: 6803764 (2004-10-01), Hioka
patent: 7170292 (2007-01-01), Doty et al.
patent: 7250767 (2007-07-01), Hofmann et al.
patent: 2003/0102867 (2003-06-01), Hioka
patent: 2007/0189892 (2007-08-01), Oguma
F. D. Doty et al., Rev. Sci. Instrum., 52(12), “Design of High Speed Cylindrical NMR Sample Spinners,” 1868-1875 (1981).
F. D. Doty et al., Proceedings IECEC-91, “High Efficiency Microturbine Technology,” 2, 436-442 (1991).
F. D. Doty, “Probe Design & Construction,” The Encyclopedia of NMR vol. 6, Wiley, 3753-3762, (1996).
F. D. Doty, “Solid State Probe Design,” The Encyclopedia of NMR vol. 7, Wiley, 4475-1185, (1996).
F. D. Doty et al., “Magnetism in High-Resolution NMR Probe Design. II: HR MAS”, Concepts in Magnetic Resonance, vol. 10(4), 239-260 (1998).
Fishman Bella
Gloekler David P.
Shrivastav Brij B
Varian Inc.
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