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. 09, 1980
Filed:
Mar. 23, 1978
Masami Kii, Amagasaki, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
An improved self-extinguishing puffer-type circuit interrupter comprising a casing filled with an arc extinguishing gas such as SF.sub.6 gas and including a pair of separable contacts, wherein the arc extinguishing fluid is pressure-raised by the energy of an electric arc, established upon the separation of the contacts, to be puffed to the arc to extinguish it. The interrupter includes means for releasing the arc extinguishing gas to the exterior of the extinguishing chamber when the pressure within the pressure-raising chamber in which the gas is pressurized by the arc energy reaches a certain value. The interrupter may include a valve, disposed between the pressure-raising chamber and the arc extinguishing chamber, adapted to open only when the pressure in the pressure-raising chamber is less than that above-mentioned certain pressure value.