Power steering gear

Claim 1

IN A POWER STEERING GEAR, A CYLINDER, A POWER PISTON MOUNTED IN SAID CYLINDER, A HOUSING, A VALVE MOUNTED IN SAID HOUSING INCLUDING A VALVE SPOOL, A SOURCE OF FLUID UNDER PRESSURE, SAID VALVE INTERCONNECTING SAID SOURCE OF FLUID AND SAID CYLINDER FOR SELECTIVELY DIRECTING FLUID FROM SAID SOURCE TO OPPOSITE ENDS OF SAID CYLINDER TO ACTUATE SAID POWER PISTON UPON AXIAL MOVEMENT OF SAID VALVE SPOOL, A MANUALLY ROTATABLE INPUT MEMBER ROTATABLY MOUNTED IN SAID HOUSING, A ROTATABLE OUTPUT MEMBER ROTATABLY MOUNTED IN SAID HOUSING, MEANS CONNECTING SAID MANUALLY ROTATABLE INPUT MEMBER AND SAID ROTATABLE OUTPUT MEMBER FOR PERMITTING RELATIVE ROTATION OF SAID MANUALLY ROTATABLE INPUT MEMBER AND SAID ROTATABLE OUTPUT MEMBER UPON THE APPLICATION OF A PREDETERMINED TORQUE TO SAID MANUALLY ROTATABLE INPUT MEMBER, AN AXIALLY EXTENDING SLOT POSITIONED IN ONE OF SAID MEMBERS, A SLOT SKEWED WITH RESPECT TO SAID AXIALLY EXTENDING SLOT POSITIONED IN THE OTHER OF SAID MEMBERS, A BALL POSITIONED IN SAID SLOTS, SAID VALVE SPOOL POSITIONED COAXIALLY BETWEEN SID INPUT MEMBER AND SAID OUTPUT MEMBER, AND HAVING AN APERTURE SUBSTANTIALLY THE SAME SIZE AS SAID BALL FOR RECEIVING SAID BALL WHEREBY RELATIVE ROTATION OF SAID INPUT MEMBER WITH RESPECT TO SAID OUTPUT MEMBER CAUSES AXIAL MOVEMENT OF SAID VALVE SPOOL.