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:
Nov. 22, 2011
Filed:
Apr. 06, 2009
Mark Joseph Kuzdzal, Allegany, NY (US);
Harry Francis Miller, Allegany, NY (US);
Glenn R. Grosso, Olean, NY (US);
Martin D. Maier, Allegany, NY (US);
David J. Peer, Olean, NY (US);
Mark Joseph Kuzdzal, Allegany, NY (US);
Harry Francis Miller, Allegany, NY (US);
Glenn R. Grosso, Olean, NY (US);
Martin D. Maier, Allegany, NY (US);
David J. Peer, Olean, NY (US);
Dresser-Rand Company, Olean, NY (US);
Abstract
A sealing assembly configured to seal a rotating shaft of a turbo machine having a high pressure process gas, comprising a housing defining a bore configured to receive the rotating shaft and sealing assembly, wherein the housing is mounted to a casing of the turbo machine; a first sealing stage comprising a single dry gas seal and configured to blow down the high pressure process gas to a lower pressure; a labyrinth seal mounted longitudinally outward from the first sealing stage; and a second sealing stage mounted longitudinally outward from the labyrinth seal, wherein the second sealing stage comprises a tandem dry gas seal having a primary dry gas seal and a secondary dry gas seal axially spaced with an intermediate labyrinth seal.