DOVER

Precision stages comprised of a linear bearing being a machine part, namely, air, round rail linear machine bearing, or profile rail machine bearing and support frame being a structural part therefor for use in connection with control machines; and a prime mover, namely, a machine belt, linear motor, and ball screws and lead screws being structural parts therefor; slide assemblies comprised of roller bearings for machines, servo-drives for motors, linear actuators and hydraulic controls for machines for the purpose of relative linear motion; air bearing stages being linear motion machines for moving objects, namely, precision stage that uses air bearings as the load supporting bearing system; gantry cranes, namely, three or more axis machines that have the main structure in an "H" configuration with two support linear stages parallel to each other with one or more linear stages attached to the parallel stages in a perpendicular orientation; all of the aforementioned goods used exclusively for motion control