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:
Jun. 16, 1998
Filed:
Dec. 18, 1996
Johannes Blatter, Gretzenbach, CH;
Fabrizio Sciullo, Oensingen, CH;
GEC Alsthom T & D AG, Oberentfelden, CH;
Abstract
In a pressurized gas circuit-breaker the mobile contact member is fixed to a connecting rod that passes coaxially through the fixed braking cylinder. The braking cylinder has transverse walls at both ends so as to delimit a cylinder. The connecting rod has a drive abutment that drives the braking piston in a final section of the opening travel, which increases the pressure in the first sub-space and reduces the pressure in the second sub-space. The braking piston is disposed on a bush around the connecting rod, the bush and the connecting rod delimiting an annular cylinder space between the drive member and a counter-abutment on the bush, a pressure being generated when the circuit-breaker opens. In this way a high braking force with no impact is very rapidly obtained.