Controllable pitch propeller

Claim 1

AN ADJUSTABLE PITCH MARINE PROPELLER AND DRIVE SHAFT ASSEMBLY ENABLING INTERNAL FLUID ACTUATED ROTATION OF THE PROPELLER BLADES, BUT PREVENTING EXTERNAL ROTATION THEREOF BY WATER PRESSURE ON THE BLADES, COMPRISING: A ROTATABLE PROPELLER HUB HOUSING HAVING AN OPENING IN ITS FORWARD END TO RECEIVE THE DRIVE SHAFT; A PLURALITY OF PROPELLER BLADES RADIALLY AROUND SAID HOUSING, EACH HAVING AN END SHAFT RECEIVED IN SAID HOUSING TO REVOLVE WITH SAID HOUSING, EACH OF SAID END SHAFTS HAVING A PERIPHERAL ROTATIONAL BEARING CONNECTION IN SAID HOUSING TO ALLOW ROTATION OF THE SHAFTS ON THEIR AXES; EACH OF SAID END SHAFTS HAVING CAM FOLLOWER PIN MEANS ON THE INNER END THEREOF, OFFSET FROM THE AXIS OF SAID END SHAFT; A FLUID CYLINDER, FORMED IN THE REAR OF SAID HOUSING BEHIND SAID END SHAFTS AND MOUNTED TO ROTATE WITH SAID HOUSING; A HOLLOW FLUID ACTUATOR SLEEVE SLIDABLY MOUNTED IN SAID CYLINDER FOR FORE AND AFT MOTION, HAVING A CROSS PARTITION, AN INNER CHAMBER, AND AN ANNULAR OUTER PERIPHERAL RECESS, AND INCLUDING AXIALLY INTERFITTING GUIDE MEANS INTERFITTED WITH SAID HOUSING TO PREVENT ROTATION OF SAID SLEEVE WITH RESPECT TO SAID HOUSING WHILE ALLOWING AXIAL MOVEMENT THEREOF; A SEALING AND GUIDE ELEMENT MOUNTED TO THE END OF THE DRIVE SHAFT TO ROTATE THEREWITH, HAVING SEAL MENS SEALING THE FORWARD