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:
May. 13, 2008
Filed:
Mar. 01, 2004
Henri V. Azibert, Windham, NH (US);
Henri V. Azibert, Windham, NH (US);
A.W. Chesterton Company, Stoneham, MA (US);
Abstract
A mechanical seal for providing a fluid-tight seal between a rotating shaft and a stationary housing comprises a first pair of seal members for sealing and separating a process fluid from a barrier fluid and a shuttle. The first pair of seal members comprises a first rotatable seal ring having a rotary seal face and a first stationary seal ring having a stationary seal face engaging the rotary seal face. The shuttle member is positioned relative to the rotary seal ring or the stationary seal ring and axially movable between a first position and a second position in response to changing pressure conditions within the mechanical seal thereby maintaining the mechanical seal regardless of the change in pressure conditions.