Patent ID: 7484734

Claim:
A shaft sealing assembly for static and dynamic axial sealing of a centrally located rotatably moving shaft, the shaft sealing assembly comprising: a) at least one sealing member sealing said shaft; b) at least one rotor member attached to said shaft; c) a housing surrounding said at least one rotor member and said shaft; d) a stator member attached to said housing; e) said at least one sealing member positioned in a recess in said at least one rotor member and adapted to maintain sealing performance of said sealing, during statical sealing, without degradation thereof, caused by a differential pressure present in an axial direction between media disposed on two sides of said shaft sealing assembly; f) said at least one sealing member being arranged to statically seal against a substantially radially oriented surface of said stator member, a substantially radially oriented surface of said recess and a substantially axially oriented surface of said recess, such that said dynamic axial sealing is achieved on rotation of said shaft by said at least one rotor member; and g) said at least one sealing member being configured to move axially and radially away from a static sealing position on rotation of said shaft.