Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Andrew L. Flaherty0
Date of Patent
June 2, 2009
0Patent Application Number
109818570
Date Filed
November 5, 2004
0Patent Primary Examiner
Patent abstract
A segmented shaft seal is provided for circumferentially sealing an outer surface of a rotating shaft unit. The shaft seal includes a plurality of seal ring segments disposed within a housing having a circumferential spring holding the ring segments together. The ring segments further have lift grooves defined on the circumferential inner surfaces thereof to generate a radially outwardly directed lift force acting against the inwardly directed spring force. The lift grooves have a tapered profile radially and/or circumferentially to facilitate formation of the outwardly directed lift force as well as molding of the ring segments.
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