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:
Jan. 25, 2000
Filed:
Aug. 10, 1998
Edmond Thuries, Meyzieu, FR;
GEC Alsthom T & D SA, Paris, FR;
Abstract
A circuit-breaker of the puffer type, comprising two arcing contacts, at least one of the arcing contacts being part of a moving contact assembly made up of a first tube co-operating with a second tube to define a blast chamber, and a compression chamber closed by a semi-moving piston, the circuit-breaker being provided with first means for holding the piston stationary during a first portion of the displacement stroke of the moving contact assembly between the closed position and the open position, and with second means for displacing the piston axially with the moving contact assembly during a second portion of the same displacement stroke. The first means for holding the piston stationary comprise a stationary retaining member for locking an abutment arrangement associated with the piston, and the second means for axially displacing the piston comprise an unlocking member for unlocking said abutment arrangement, which member is associated with the moving contact assembly.