Hydraulic actuator shaft, bearing and seal

Claim 1

IN A HYDRAULIC ACTUATOR INCLUDING COAXIALLY RELATED STATOR AND ROTOR MEMBERS AND END PLATES ON OPPOSITE ENDS OF SAID STATOR MEMBER, SAID ROTOR INCLUDING SHAFT END PORTIONS OF REDUCED DIAMETER FORMING ANNULAR SHOULDERS THEREBETWEEN, SAID END PLATES BEING FORMED WITH BEARING OPENINGS FOR PASSING SAID SHAFT END PORTIONS ON SAID ROTOR MEMBER, SEALING MEANS FOR SEALING THE JOINT BETWEEN SAID END PLATES AND SAID SHAFT END PORTIONS COMPRISING A BEARING METAL SLEEVE IN THE BEARING OPENINGS OF SAID END PLATES AND FIXED TO SAID END PLATES, SAID BEARING METAL SLEEVE TERMINATING AT THE INNER END THEREOF SHORT OF THE INNER FACE OF SAID END PLATES TO EXPOSE AN INNER END PORTION OF THE BEARING OPENING IN SAID END PLATES AND TO PROVIDE AN ANNULAR RECESS BETWEEN THE EXPOSED INNER END PORTION OF THE BEARING OPENING IN SAID END PLATES, THE TERMINAL END OF SAID BEARING METAL SLEEVE AND THE INNER END OF SAID SHAFT END PORTION, A BEARING METAL RING OF L-SHAPE IN CROSS-SECTION LOCATED IN SAID ANNULAR RECESS, SAID RING INCLUDING ONE ARM IN BEARING RELATION TO THE INNER END OF SAID SHAFT END PORTION AND THE OTHER ARM ABUTTING THE TERMINAL END OF SAID BEARING SLEEVE, AND AN ANNULAR RESILIENT SEAL MEMBER SEATED IN SAID BEARING METAL RING BETWEEN THE ARMS THEREOF AND HAVING PORTIONS THEREOF ABUTTING A SHOULDER PORTION OF SAID SHAFT END AND THE EXPOSED INNER END PORTION OF THE BEARING OPENING IN SAID END PLATE.