Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
August 23, 2011
Patent Application Number
12129735
Date Filed
May 30, 2008
Patent Citations Received
Patent Primary Examiner
Patent abstract
A seal comprises the combination of a primary seal and a secondary seal each of which acts on at least one shoe that is installed with clearance relative to one of a rotor and a stator in a position to create a non-contact seal therewith. The at least one shoe is provided with a surface geometry that influences the inertia of fluid flowing across the seal, and, hence, the velocity of the fluid and the pressure distribution across the seal, ultimately affecting the balance of forces applied to the seal.
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