Foley & Lardner
Bearing design for flywheel energy storage using high-TC superconductors
 A high temperature superconductor material bearing system (38) This system (38) includes a rotor (50) having a ring permanent magnet (60), a plurality of permanent magnets (16, 20 and 70) for interacting to generate levitation forces for the system (38). This group of magnets are a push/pull bearing (75). A high temperature superconductor structure (30) interacts with the ting permanent magnet (60) to provide stabilizing forces for the system (38). 
The University of Chicago
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H02K F16C H02K F16C
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John R. Thomas M.
Hull Mulcahy