Lubricated ball valve construction

Claim 1

IN A BALL VALVE CONSTRUCTION INCLUDING A VALVE BODY HAVING A CYLINDRICAL FLUID PASSAGE AND A BALL VALVE OPENING AND CLOSING SAID FLUID PASSAGE, VALVE SEAT MEANS COMPRISING: (A) AN ANNULAR RECESS IN SAID VALVE BODY COAXIAL WITH SAID FLUID PASSAGE AND OPPOSING SAID VALVE, (B) AN ANNULAR SEAT HOLDER RECEIVED IN SAID ANNULAR RECESS, SAID SEAT HOLDER HAVING A CIRCULAR OPENING THERETHROUGH IN ALIGNMENT WITH SAID PASSAGE, (C) SAID SEAT HOLDER HAVING A FACE OPPOSING SAID VALVE, (D) AN ANNULAR SEAT RECESS IN SAID SEAT HOLDER OPENING THROUGH SAID FACE, (E) AN ANNULAR VALVE SEAT FIXED WITHIN SAID SEAT RECESS, (F) SAID SEAT HAVING A SEAT FACE WITH A LOW COEFFICIENT OF FRICTION PROJECTING AXIALLY FROM SAID SEAT RECESS BEYOND THE FACE OF SAID SEAT HOLDER TO SLIDABLY ENGAGE SAID VALVE (G) AN ANNULAR CAVITY HAVING OPPOSED ANNULAR WALLS IN SAID SEAT FACE, (H) RADIAL ALIGNMENT HOLES EXTENDING THROUGH SAID SEAT AND SEAT HOLDER CONNECTING SAID CAVITY WITH SAID RECESS IN SAID VALVE BODY FOR CONVEYING FLUID LUBRICANT TO SAID CAVITY, AND (I) MEANS FOR INTRODUCING A FLUID LUBRICANT THROUGH SAID VALVE BODY INTO SAID ALIGNED HOLES.