Stacked magnet superconducting bearing
Patent 5220232 Issued on June 15, 1993. Estimated Expiration Date: 
September 3, 2011. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
September 3, 2011. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3233950 3378315 3493274 3614181 Radial magnetic bearing Radial magnetic bearing Method of making a wedge-shaped permanent magnet rotor assembly Electric motor unit Rotor with permanent magnets having thermal expansion gaps Superconductor-magnet induced separation InventorsAssigneeApplicationNo. 753760 filed on 09/03/1991US Classes:310/90.5, Magnetic bearing310/156.25, Axially offset and radially magnetized magnets310/156.36, With plural sets of rotating magnets505/876Electrical generator or motor structure: (Class 310)ExaminersPrimary: Stephan, Steven L.Assistant: Nguyen, Matthew Attorney, Agent or FirmInternational ClassH02K 007/09AbstractIn a superconducting bearing, flux density and flux density gradient are increased between a magnetic source and a member of superconducting material. A plurality of magnets are magnetized end-to-end and stacked side-by-side in alternating polarity. Non-magnetic shims are disposed between the magnets. Flux lines flow between the ends of adjacent magnets and communicate with the member. Resulting is higher bearing load capacity and stiffness. When the member is made from a Type II superconducting material, the bearing provides support in both the radial and axial directions.Other References
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