The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 15, 2026
Filed:
Mar. 08, 2023
Hitachi Energy Ltd, Zürich, CH;
Jedrzej Bananszczyk, Wieliczka, PL;
Jan Czyzewski, Cracow, PL;
Bartlomiej Adamczyk, Niedzwiedz, PL;
Lucasz Bachorz, Cracow, PL;
Wojciech Wysocki, Cracow, PL;
Marcin Tarnowski, Przasnysz, PL;
Roger Hedlung, Ludvika, SE;
Peter Sjoberg, Ludvika, SE;
Jan Ostlund, Ludvika, SE;
Hitachi Energy Ltd, Zürich, CH;
Abstract
A high voltage (HV) apparatus insulated with an insulating gel includes at least two electrically conductive elements, such as a head transformer cover, a head housing base, a core casing, a primary conductor, bottom external housing, a bottom support flange, and/or a core. At least one of the electrically conductive elements has a coating made of solid insulating material separating the surface of the conductive element from the insulating gel and adapted for limiting electron emission from the conductive elements into the insulating gel.