Machines and machine tools for the cutting and forming of materials for treatment of materials and for manufacturing; linear actuators for valves; valves as parts of machines; pneumatic valve actuators; hydraulic valve actuators; valve closure mechanisms, namely, linear actuators, pneumatic valve actuators and hydraulic valve actuators; clack valves as parts of machines; pressure valves as parts of machines; pressure controllers in the nature of valves being parts of machines; cylinders for m...