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:
Mar. 08, 2016
Filed:
Nov. 13, 2012
Stephen G. Clute, Cuba, NY (US);
Mark J. Kuzdzal, Allegany, NY (US);
Glenn R. Grosso, Olean, NY (US);
David J. Peer, Olean, NY (US);
Stephen G. Clute, Cuba, NY (US);
Mark J. Kuzdzal, Allegany, NY (US);
Glenn R. Grosso, Olean, NY (US);
David J. Peer, Olean, NY (US);
Dresser-Rand Company, Olean, NY (US);
Abstract
Balance piston assembly, apparatus, and methods are provided. The assembly includes a balance piston coupled to a rotatable shaft and configured to rotate therewith, the balance piston including a first shelf and a second shelf, the first and second shelves being axially-overlapping and radially-offset. The assembly also includes a seal including a first sealing surface configured to seal with the first shelf and a second sealing surface configured to seal with the second shelf.