Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Xiaoqing Zheng0
Alexander Kimberley Simpson0
Biao Fang0
Keith Michael Parker0
Norman Arnold Turnquist0
Robbert Christiaan Pannekeet0
Rodrigo Rodriguez Erdmenger0
Date of Patent
April 30, 2013
0Patent Application Number
126308860
Date Filed
December 4, 2009
0Patent Citations Received
Patent Primary Examiner
Patent abstract
A pressure balance seal includes a sealing surface facing an inward radial direction, and a stator interface comprising at least one surface interfacing with a stator. The pressure balance seal further includes a friction reducing feature. The friction reducing feature includes a cavity on the sealing surface. The cavity is configured to receive a fluid such that a normal force acting on the pressure balance seal is counterbalanced by a force generated by a pressure of the fluid.
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