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:
Nov. 25, 1980
Filed:
Aug. 29, 1978
Koji Sasaki, Hitachi, JP;
Yoshihito Asai, Hitachi, JP;
Hitachi, Ltd., , JP;
Abstract
A puffer type gas circuit breaker in which a stationary arcing contact constituting the stationary part of a breaking unit is surrounded by an envelope including an annular shield element acting to relieve the electric field around the free end of the stationary arcing contact, and a gas passage extending in the axial direction of the stationary arcing contact is formed in the side portion of the envelope so that the greater portion of an arc extinguishing gas puffed toward the stationary arcing contact can be discharged through the gas passage. In the circuit breaker, a gas-shielding hood is disposed around the envelope for preventing the gas stream discharged from the gas passage from flowing directly straight.