Adjustable pitch propeller

Claim 1

AN ADJUSTABLE PITCH PROPELLER APPARATUS FOR ATTACHMENT TO THE DRIVE SHAFT OF A BOAT MOTOR COMPRISING: (A) A FIRST FIXED ANNULAR WALL SURROUNDING A DRIVE SHAFT OF A BOAT MOTOR, (B) A SECOND FIXED ANNULAR WALL SPACED APART FROM SAID FIRST WALL AND FORMING AN ANNULAR HYDRAULIC CHAMBER THEREBETWEEN, (C) AN ANNULAR PISTON SLIDABLY DISPOSED IN SAID HYDRUALIC CHAMBER, (D) AN ANNULAR THRUST BEARING SLIDABLY DISPOSED IN SAID HYDRAULIC CHAMBER ADJACENT SAID PISTON, SAID BEARING HAVING A PLURALITY OF SOCKETS FORMED IN ONE RACE, (E) A ROTATABLE HOUSING SURROUNDING SAID DRIVE SHAFT ADJACENT SAID FIRST AND SECOND FIXED ANNULAR WALLS, (F) A PLURALITY OF RADIALLY EXTENDING ADJUSTABLE PITCH PROPELLER BLADES ROTATABLY MOUNTED ON SAID ROTATABLE HOUSING, (G) A PLURALITY OF CONTROL ARMS SLIDABLY DISPOSED WITHIN SAID ROTATABLE HOUSING AND BETWEEN SAID FIRST AND SECOND WALLS, ONE END OF EACH OF SAID CONTROL ARMS HAVING A BALL ENGAGING ONE OF SAID SOCKETS FORMED IN SAID THRUST BEARING RACE, (H) A PLURALITY OF PINS, ONE OF SAID PINS MOUNTED IN EACH OF SAID BLADES AT A SPACED APART LOCATION FROM SAID ROTATABLE MOUNTINGS, EACH OF SAID PIN DEPENDING INTO SAID ROTATABLE HOUSING AND ENGAGING THE OTHER END OF EACH OF SAID CONTROL ARMS, WHEREBY TRANSLATION OF SAID CONTROL ARMS ROTATES SAID PROPELLER BLADES SO AS TO CHANGE THE PITCH OF THE BLADES, (I) MEANS INTERCONNECTING SAID ROTATABLE HOUSING AND THE DRIVE SHAFT, AND (J) RESILIENT MEANS FOR BIASING SAID ANNULAR PISTON.