Fluid-Pressure Rotary Actuator for Clamping Systems

A rotary actuator for controlling a lead screw of a clamping system, the rotary actuator comprising:

• an adapter shaped and contoured to engage an end of the lead screw of the clamping system;
• a body with a hole or through hole on a front portion and at least one hole on each side;
• a cam rotor with a cylindrical body, a first cam lobe profile, and a second cam lobe profile, the cam rotor being positioned inside the hole or through hole on the front portion of the body, each cam lobe profile including multiple cam lobes and being concentric with the cylindrical body, the first cam lobe profile and the second cam lobe profile having a same design and being rotationally offset from each other and longitudinally offset in a longitudinal direction along a center axis of the cam rotor, an end of the cam rotor configured to retain the adapter;
• and
• multiple piston assemblies configured to rotate the cam rotor as high pressure and low pressure are alternatingly applied via a fluid to piston chambers associated with the multiple piston assemblies, a first piston assembly of the multiple piston assemblies being arranged in contact with the multiple cam lobes of the first cam lobe profile, a second piston assembly of the multiple piston assemblies being arranged in contact with the multiple cam lobes of the second cam lobe profile, the multiple piston assemblies being positioned inside a corresponding side hole of the multiple side holes of the body.