Abstract: A load measuring device for an oleopneumatic load intensifier apparatus which causes a rapid advance of a tool carrying piston rod followed by slow advance of the piston rod at an increased load. the oleopneumatic apparatus has a master cylinder and an actuating cylinder that can assume different positions with respect to the master cylinder while maintaining fluid communication therewith. An enclosed hydraulic system is shared by the master and actuating cylinders. Pneumatic pressure actuates a piston within the master cylinder that causes a rapid advancement of a hydraulic fed piston withihn the actuating cylinder, causing a piston rod and a tool associated therewith to contact a workpiece. The load measuring device monitors the load associated with the pneumatic pressure applied to the piston and associated piston rod, located in the master cylinder and the resultant force applied to the hydraulic fed piston located within the actuating cylinder to precisely determine the load delivered to the workpiece.

Abstract: An oleopneumatic load intensifier apparatus for creating a rapid advance of a tool carrying rod followed by slow advance of the piston rod at an increased load. The apparatus has a master cylinder and an actuating cylinder that can assume different positions with respect to the master cylinder while maintaining fluid communication therewith. An enclosed hydraulic system is shared by the master and actuating cylinders. Pneumatic pressure actuates a piston within the master cylinder that causes a rapid advancement of a hydraulically fed piston within the actuating cylinder, causing a piston rod and a tool associated therewith to contact a workpiece. Pneumatic pressure then causes a piston and associated piston rod, located in the master cylinder, to increase the hydraulic pressure in the line to the hydraulically fed piston located within the actuating cylinder, thus, increasing the load delivered to the workpiece.

Abstract: A compact electrically driven linear actuator having an electric motor in a housing. The electric motor has a cylindrically-shaped rotor assembly which is attached to and circumscribes a threaded spindle. A portion of the threaded spindle is received in an axial bore of a non-rotatable extendable arm. A nut attached to one end of the non-rotatable extendable arm is threadably received on the threaded spindle. Rotation of the threaded spindle by the electric motor linearly displaces the nut and the non-rotatable extendable arm along the length of the threaded spindle. In the preferred embodiment, the threaded spindle has a helical ball groove and the nut is a mating ball nut.

Abstract: An oleopneumatic load intensifier apparatus for creating a rapid advance of a tool carrying piston rod followed by slow advance of the piston rod at an increased load. The apparatus has a master cylinder and an actuating cylinder that can assume different positions with respect to the master cylidner while maintaining fluid communication therewith. An enclosed hydraulic system is shared by the master and actuating cylinders. Pneumatic pressure actuates a piston within the master cylinder that causes a rapid advancement of a hydraulic fed piston within the actuating cylinder, causing a piston rod and a tool associated therewith to contact a workpiece. Pneumatic pressure then causes a piston and associated piston rod, located in the master cylinder, to increase the hydraulic pressure in the line to the hydraulic fed piston located within the actuating cylinder, thus, increasing the load delivered to the workpiece.