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:
May. 10, 2016
Filed:
Oct. 09, 2013
Hitachi, Ltd., Chiyoda-ku, Tokyo, JP;
Hideyuki Kotsuji, Tokyo, JP;
Hajime Urai, Tokyo, JP;
Makoto Koizumi, Tokyo, JP;
Makoto Hirose, Tokyo, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A pair of arcing contactsandfacing each other are placed in a tankto perform opening and closing operation, and a puffer cylinderis coaxially provided on the circumference of one arcing contact. A puffer chamberis comprised of the puffer cylinder, a fixed piston, and a hollow rod. An insulating nozzleforming a space communicating with the puffer chamberis provided. An exhaust tubefor exhausting and cooling hot gas discharged from an arc produced in the insulating nozzleis provided on the circumference of the other arcing contact. A structurefor temporarily reducing the flow path area is provided on the inner circumferential surface at short of the end portion of the exhaust tube