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:
Jul. 21, 2009
Filed:
Mar. 25, 2005
Michel Perret, Tramolé, FR;
Michel Perret, Tramolé, FR;
Areva T & D SA, Paris la Defense Cedex, FR;
Abstract
The control device comprises a vacuum first item of switchgear () which includes a pair of contacts () that can be separated for interruption purposes. It also includes a main drive shaft () for actuating a second item of switchgear () immersed in a gaseous insulating fluid (G) contained at a determined pressure (P), and further includes an auxiliary shaft () to enable a moving contact () of the first item of switchgear () to be driven. The auxiliary shaft () passes in leaktight manner through a wall (A,') which separates the volume of gaseous insulating fluid (G) from another volume (V) of fluid (G) at a lower pressure, the difference between the respective pressures (P, P) of the two fluids (G, G) procuring a certain force (F) which is applied to said auxiliary shaft () and which participates in said contact pressure force.