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. 19, 2002
Filed:
Feb. 23, 1998
Applicant:
Inventor:
Philippe Jacques Auber, Le Havre, FR;
Assignee:
Dresser-Rand Company, The Woodlands, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F01D 1/102 ;
U.S. Cl.
CPC ...
F01D 1/102 ;
Abstract
The present invention relates to a shaft seal ( ) comprising a sealing element ( ) mounted co-axially to a rotary sealing ring ( ) to form a primary seal between opposed faces thereof to substantially prevent fluid flow across the primary seal. The sealing element ( ) is urged axially towards the rotary ring ( ) by a springs ( ) acting between a pusher sleeve ( ) connected to the sealing element and a seal housing ( ). A secondary seal formed between the pusher sleeve ( ) and the housing ( ) by a sealing member ( ) located in a channel ( ) in the pusher sleeve ( ).