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:
Feb. 01, 2005
Filed:
Sep. 20, 2001
Applicant:
Philippe Jacques Auber, Le Havre, FR;
Inventor:
Philippe Jacques Auber, Le Havre, FR;
Assignee:
Dresser-Rand Company, Olean, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16J 1534 ;
U.S. Cl.
CPC ...
Abstract
A shaft seal in which a rotary sealing part is mounted coaxially with the sealing element and forms therewith a contactless primary seal between opposed faces of the sealing element and rotary sealing part to substantially prevent fluid flow across the primary seal from a high pressure radial side to a low-pressure radial side. An auxiliary sleeve forms a small gap between it and a seal housing and maintains the gap despite the presence of relatively high pressure at the high pressure radial side.