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:
Aug. 23, 1977
Filed:
Aug. 07, 1975
Charles F Cromer, Trafford, PA (US);
Willie B Freeman, Monroeville, PA (US);
Westinghouse Electric Corporation, Pittsburgh, PA (US);
Abstract
An improved puffer-type gas-blast circuit-interrupter is provided having a movable operating cylinder assembly movable over a relatively-fixed piston structure. A high-compression ratio is obtained during the opening operation by minimizing the 'dead' volume of arc-quenching gas within the movable operating cylinder, and an efficient gas-flow path through the movable cylinder assembly smoothly converges through the movable nozzle throat area into the drawn arc. The improved puffer-type interrupter of the present invention, additionally, is provided with a shorter insulating nozzle than in conventional 'puffers' to provide a more efficient gas path; and finally, a continuous annular stationary piston configuration requires no orientation procedures for assembly operations.