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. 23, 2019
Filed:
Nov. 24, 2015
Applicant:
Nuovo Pignone Srl, Florence, IT;
Inventors:
Assignee:
Nuovo Pignone srl, Florence, IT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16J 15/00 (2006.01); F16J 15/18 (2006.01); F16J 15/46 (2006.01); F16J 15/48 (2006.01); F16K 41/00 (2006.01); F16K 41/04 (2006.01);
U.S. Cl.
CPC ...
F16J 15/004 (2013.01); F16J 15/185 (2013.01); F16J 15/186 (2013.01); F16J 15/46 (2013.01); F16J 15/48 (2013.01); F16K 41/003 (2013.01); F16K 41/04 (2013.01);
Abstract
A seal assembly for a valve stem comprises an external seal placed on a valve stem facing an external environment; an internal seal placed on the valve stem facing a process environment; the external and internal seals define a chamber for the containment of barrier fluid; the chamber has an inlet configured to be placed into fluid communication with a source of barrier fluid; a detector of the amount of barrier fluid; a pressurizer device for providing the chamber with a positive pressure with respect to the process environment; the pressurizer device is configured to be installed coaxially with the valve stem.