Inductor devices – Coils of special configuration – Toroidal
Reexamination Certificate
2007-06-05
2009-11-10
Nguyen, Tuyen (Department: 2832)
Inductor devices
Coils of special configuration
Toroidal
Reexamination Certificate
active
07616088
ABSTRACT:
A toroidal step-up or step-down transformer includes a toroidal magnetic core, a primary formed from a plurality of primary windings, and a secondary formed from a plurality of secondary windings. Parallel connected windings are added to at least one of the primary and secondary to make the number of primary windings equal to the number of secondary windings, the primary and secondary windings being arranged symmetrically around the core.
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patent: 7199569 (2007-04-01), Nakahori
patent: 2006/0044104 (2006-03-01), Derks
patent: 2006/0132276 (2006-06-01), Harding
Baker Dan
Goeke Wayne C.
Keithley Instruments Inc.
Nguyen Tuyen
Pearne & Gordon LLP
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