Split ball valves having cam sealing

Claim 1

A BALL VALVE COMPRISING A VALVE BODY HAVING A HOLLOW INTERIOR AND PASSAGEWAYS OPENING TO SAID HOLLOW INTERIOR, AN INTEGRAL BALL MEMBER RECEIVED IN SAID HOLLOW INTERIOR AND HAVING A PASSAGEWAY THERETHROUGH FOR COMPLETING FLUID COMMUNICATION BETWEEN SAID PASSAGEWAYS IN ONE ROTATIVE POSITION OF SAID BALL MEMBER IN SAID VALVE BODY, SEALING ELEMENTS DISPOSED ABOUT SAID PASSAGEWAYS BETWEEN SAID BALL MEMBER AND SAID VALVE BODY, SAID SEALING ELEMENTS BEING SIZED TO COOPERATE WITH SAID BALL MEMBER TO CLOSE OFF THE OPENING OF THE PASSAGEWAYS TO THE HOLLOW INTERIOR WHEN SAID BALL MEMBER IS IN ANOTHER ROTATIVE POSITION RELATIVE TO THE VALVE BODY, A STEM COUPLED TO SAID BALL MEMBER TO ROTATE THE SAME, SAID BALL MEMBER HAVING A SINGLE SPLIT EXTENDING BETWEEN SAID BALL MEMBER PASSAGEWAY AND THE EXTERIOR OF SAID BALL MEMBER AT A DIAMETRICAL LOCATION FROM SAID STEM, SAID BALL MEMBER FURTHER HAVING CAM FOLLOWER SURFACES RESPECTIVELY DISPOSED TO EACH SIDE OF SAID SPLIT, A CAM MEMBER IN SAID VALVE BODY ENGAGEABLE BY SAID CAM FOLLOWER SURFACES IN SAID OTHER ROTATIVE POSITION TO URGE THE SURFACES DEFINED BY SAID SPLIT AWAY FROM ONE ANOTHER THEREBY TO MECHANICALLY COMPRESS SAID SEALING ELEMENTS.