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. 23, 2005
Filed:
Oct. 28, 2003
Applicant:
Stefano Meucci, Florence, IT;
Inventor:
Stefano Meucci, Florence, IT;
Assignee:
Nuovo Pignone Holding S.p.A., Florence, IT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16J009/28 ; F04B017/00 ;
U.S. Cl.
CPC ...
Abstract
A device () for circulating sealing gas for mechanical dry seals () of a centrifugal compressor () at times when the machine is stationary and pressurized; the device comprises a sealed reciprocating compressor (), which includes a piston () slidable in a cylinder (), and the piston () is moved by a magnetic coupling to an external magnetic element () which moves along the said cylinder ().