Actuator cylinder with mechanism to reduce stiction

摘要

A linear actuator cylinder reduces the stiction otherwise present during initiation of rod extension or retraction. The actuator cylinder includes a cylinder assembly having a piston that slides longitudinally through a cylinder barrel. A rod is connected to the piston and extends from the cylinder barrel. A rotator mechanism is connected to the rod to rotate the piston and rod with respect to the cylinder barrel. The rotator mechanism typically includes a hydraulic or electric motor connected to the rod by, for example, a chain engaged with a pair of sprockets.