Hydraulically actuated controllable-pitch propeller system

Claim 1

A HYDRAULICALLY ACTUATED CONTROLLABLE-PITCH PROPELLER FOR OUTBOARD MOTORS AND OUTDRIVES COMPRISING A HUB HAVING CYLINDER MEANS THEREIN, MOVABLE PISTON MEANS IN SAID CYLINDER MEANS, A PLURALITY OF BLADES MOUNTED ON SAID HUB HAVING STUB SHAFTS ROTATABLY RECEIVED IN SAID HUB, PITCH CONTROL AMRS SECURED TO SAID STUB SHAFTS AND EACH HAVING FIRST AND SECOND ENDS ON GENERALLY OPPOSITE SIDES OF SAID STUB SHAFT, A PLURALITY OF SPRINGS IN SAID HUB PRESSING SAID FIRST ENDS OF THE CONTROL ARMS AGAINST SAID PISTON MEANS FOR ENGAGING SAID PISTION MEANS FOR CHANGING THE PITCH SETTING OF THE BLADES IN RESPONSE TO MOVEMENT OF SAID PISTON MEANS, SAID HUB HAVING MEANS FOR ADMITTING HYDRAULIC LIQUID INTO SAID CYLINDER MEANS FOR MOVING SAID PISTON MEANS, AND A PLURALITY OF STOP SCREWS IN THE HUB FOR ENGAGING THE SECOND ENDS OF SAID CONTROL MEANS FOR LIMITING THE RANGE OF MOVEMENT OF SAID PISTON MEANS FOR LIMITING THE RANGE OF PITCH ADJUSTMENT, AND GEAR MEANS GANGING ALL OF SAID STOP SCREWS TOGETHER FOR SIMULTANEOUS ADJUSTMENT THEREOF.