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. 20, 2019
Filed:
Jan. 31, 2013
Areva NP, Courbevoie, FR;
Romain Thuillier, Valencienns, FR;
Areva NP, Courbevoie, FR;
Abstract
The present invention relates to a passive shutdown sealing device () for a reactor coolant pump unit comprising: a split sealing ring () having an inactivated position in which a leakage flow is permitted and an activated position in which said ring stops said leakage flow; at least one piston () designed to position said split sealing ring () in its activated position; locking/unlocking means () designed to lock said at least one piston () in its inactivated position when the temperature of said locking/unlocking means is below a temperature threshold and to release said at least one piston () when the temperature of said locking/unlocking means is above said temperature threshold; elastic means () designed to move said at least one piston () when said piston is released, so as to position said sealing ring () in its activated position.