258 85 http://www.patentstorm.us/ http://www.patentstorm.us/images/logo.gif http://www.patentstorm.us/rss/class/applications/rss-218.xml Recent patent applications filings in USPTO Class 218 High-voltage switches with arc preventing or extinguishing devices. Thu, 9 Feb 2012 15:03:28 patents@patentstorm.us en http://www.patentstorm.us/applications/20120018404/description.html

Application Number:  20120018404

Publication Date:  2012-01-26

Inventors:  Mino, Kazuaki; MATSUO, Hirofumi; Ota, Hiroyuki; Hosen, Toru; Shiroyama, Hironobu

A miniaturized direct-current switch with which power loss is reduced when establishing continuity of a direct-current path is provided. The direct-current switch includes an electronic open/close switch inserted in a direct-current path along which a direct current flows in order to make the direct-current path an open circuit or a closed circuit, a parallel mechanical open/close switch connected in parallel to the electronic open/close switch, and a switch control circuit that controls the ...
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Application Number:  20120012558

Publication Date:  2012-01-19

Inventors:  Kawada, Makiko; Ohtsuka, Kyoichi; Tsuchie, Ei; NAGAO, Eiichi; Minagawa, Tadao

In a gas insulated breaking device which accommodates open/close elements including a puffer cylinder which compresses an insulation gas and extinguishes an arc and a contact finger which has a slide contact portion which is brought into slide contact with a slide contact portion of the puffer cylinder in the inside of a vessel in which the insulation gas is sealed, a relatively soft plating film is formed on the slide contact portion of the puffer cylinder, and a relatively hard plating film ...
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