Permanent magnet structure for generation of magnetic fields
March 22, 2021. 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 ReferencesHollow substantially hemispherical permanent magnet high-field flux source Hollow substantially hemispherical permanent magnet high-field flux source for producing a uniform high field High-field permanent-magnet structures Periodic permanent magnet structures Magnetic block with adjustable magnetization for producing a permanent magnetic field in a zone of interest Dipole for magnetic field compensation Magnetic field sources having non-distorting access ports Dipole permanent magnet structure Spherical magnet having a gap with a periodically varying field for a wiggler radiation source Single dipole permanent magnet structure with linear gradient magnetic field intensity InventorsApplicationNo. 09/814640 filed on 03/22/2001US Classes:335/306, Plural magnets335/302Permanent magnetsExaminersPrimary: Donovan, LincolnAttorney, Agent or FirmInternational ClassesG01R 33/38 (20060101)H01F 7/02 (20060101) G01R 33/383 (20060101) AbstractA permanent magnet structure for maximizing the flux density per weight of magnetic material comprising a hollow body flux source for generating a magnetic field in the central gap of the hollow body, the magnetic field having a flux density greater than the residual flux density of the hollow body flux source. The hollow body flux source has a generally elliptic-shape, defined by unequal major and minor axis. These elliptic-shaped permanent magnet structures exhibit a higher flux density at the center gap while minimizing the amount of magnetic material used. Inserts of soft magnetic material proximate the central gap, and a shell of soft magnetic material surrounding the hollow body can further increase the strength of the magnetic field in the central gap by reducing the magnetic flux leakage and focusing the flux density lines in the central gap.Other References
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