Fluid actuated clamp

Claim 1

A FLUID ACTUATED CLAMP COMPRISING MEANS FORMING A FIRST CYLINDER, A PISTON MOVABLE AXIALLY IN SAID CYLINDER, A PISTON ROD CONNECTED TO THE PISTON, A CLAMP MEMBER OPERATIVELY ASSOCIATED WITH THE PISTON ROD, LOCKING MEANS ON THE CYLINDER AND PISTON ADAPTED, WHEN IN CIRCUMFERENTIAL REGISTRATION, TO INTERENGAGE WHEN THE PISTON IS DISPLACED TO ONE END OF THE CYLINDER FOR PREVENTING ROTATION OF THE PISTON AND THE CLAMP MEMBER, SAID PISTON BEING DISPLACEABLE TOWARD THE OTHER END OF THE CYLINDER TO RELEASE SAID LOCKING MEANS AND THEREBY PERMIT ROTATION OF THE PISTON AND THE CLAMP MEMBER, MEANS FORMING A SECOND CYLINDER, A SECOND PISTON MOVABLE AXIALLY IN THE SECOND CYLINDER, MEANS OPERATIVELY INTERCONNECTING SAID FIRST AND SECOND PISTONS FOR CAUSING ROTATING OF THE FIRST PISTON AND CLAMP IN RESPONSE TO AXIAL DISPLACEMENT OF THE SECOND PISTON IN ITS CYLINDER AND MEANS FOR CONDUCTING PRESSURE FLUID TO ONE SIDE OF BOTH PISTONS AND THEN TO THE OPPOSITE SIDE OF EACH PISTON, WHEREBY WHEN THE FIRST PISTON AND CYLINDER ARE INTERENGAGED BY SAID LOCKING MEANS AND PRESSURE FLUID IS DIRECTED TO SAID ONE SIDE OF EACH PISTON, THE PRESSURE FLUID FIRST DISPLACES THE FIRST PISTON AXIALLY TO DISENGAGE SAID LOCKING MEANS AND THE SECOND PISTON IS THEN ACTUATED BY SAID PRESSURE FLUID TO ROTATE THE CLAMP MEMBER AND WHEN THE LOCKING MEANS ARE DISENGAGED AND THE PRESSURE FLUID IS DIRECTED TO THE OTHER END OF EACH PISTON, THE SECOND PISTON IS AXIALLY DISPLACED TO ROTATE THE FIRST PISTON AND CLAMP MEMBER TO A POSITION WHERE THE LOCKING MEANS REGISTER AND THEN THE FIRST PISTON IS AXIALLY DISPLACED TO ENGAGE SAID LOCKING MEANS.