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Patent
   D454839
Priority
Sep 02 1998
Filed
Sep 02 1998
Issued
Mar 26 2002
Expiry
Mar 26 2016
Inventors
Höglund, …
Assg.orig
Hexaformer…
Assg.curr
Hexaformer…
Entity
unknown
Referenced by
9
References
8
Maint.:
n/a
The ornamental design for a three-phase ring transformer core, as shown and described.

The FIGURE is a perspective view of a three-phase ring transformer core showing my new design.
INVENTORS:

Höglund, Lennart Harry Erik

THIS PATENT IS REFERENCED BY THESE PATENTS:
Patent Priority Assignee Title
9230735, Mar 11 2013 Regal Beloit America, Inc.; Regal Beloit America, Inc Electrical coil forming apparatus and methods of assembling electrical coils
D613245, May 29 2009 SEIDEN MFG CO , LTD Core for a high-frequency three-phase transformer
D644607, May 29 2009 SEIDEN MFG CO , LTD Core for a high-frequency three-phase transformer
D709029, Mar 11 2013 Regal Beloit America, Inc Electrical coil
D747268, Dec 16 2013 Samsung Electronics Co., Ltd. Coil for wireless charger
D911438, May 15 2019 Teaching aid of a non-orientable surface
D981958, Apr 23 2021 Fukushima SiC Applied Engineering Inc. Coil for power transformer
ER1872,
ER3231,
THIS PATENT REFERENCES THESE PATENTS:
Patent Priority Assignee Title
2248606,
2838732,
4588971, Dec 11 1981 Societe Nouvelle Transfix Electric transformer with annular coil forms
4639705, Mar 06 1984 Transformer with gapless core on support
4852246, Nov 07 1988 Method of insulating a field winding coil
DE4029097,
JP57124408,
JP61036914,
ASSIGNMENT RECORDS    Assignment records on the USPTO
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Executed onAssignorAssigneeConveyanceFrameReelDoc
Apr 17 2007HOGLUND, LENNARTHexaformer ABASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS 0265530960 pdf
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