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. 23, 2020
Filed:
Jul. 22, 2014
Applicant:
Areva NP, Courbevoie, FR;
Inventor:
Zoé Tebby, Haspres, FR;
Assignee:
AREVA NP, Courbevoie, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16J 15/34 (2006.01); F04D 29/12 (2006.01); G21D 1/04 (2006.01); G21C 15/243 (2006.01);
U.S. Cl.
CPC ...
F16J 15/3424 (2013.01); F04D 29/126 (2013.01); F16J 15/34 (2013.01); F16J 15/3496 (2013.01); G21D 1/04 (2013.01); F05D 2300/516 (2013.01); F05D 2300/608 (2013.01); G21C 15/243 (2013.01);
Abstract
A packing seal is provided for a system for sealing the shaft of a primary motor-driven pump unit of a nuclear reactor, intended to ensure sealing between the primary circuit and the atmosphere. The packing seal including a rotary active surface and a floating active surface, in which a face of the floating active surface and/or the rotary active surface is micro- or nano-structured by an array of holes or pillars, each hole or pillar having lateral dimensions and a height of between 10 nm and 5 μm, the distance between two consecutive holes or pillars being between 10 nm and 5 μm.