Abstract: A support pole for raising and lowering a supported object between a lower position and an elevated position is disclosed. The support pole includes an elongate pole having a top, a bottom, and a channel extending at least partly between the top and bottom. A threaded rod is rotationally mounted within the channel, and is connected to a detachable coupling for engaging a drive tool to rotationally drive the threaded rod. A carriage engages the threaded rod, such that rotation of the rod imparts translational movement upon the carriage through the channel. The carriage includes a mounting bracket for attachment of the supported object thereto. A cable connecting the supported object and an external device or power source has a detachable coupling, and is carried along a pulley at the top of the elongate pole when the carriage is raised and lowered.

Abstract: A stabilizer for a ball screw actuator of the type having a housing, and externally threaded lead screw and a drive nut movable along the lead screw in which the stabilizer includes a first member rotationally fixed but movable linearly relative to the cylinder housing and a second member rotatable relative to, but linearly fixed, relative to the first member.

Abstract: A linear actuator utilizing limit switches to implement reliable and effective travel limit functions. The actuator having a robust construction, lower part count, smaller dimension, and lower assembly cost.

Abstract: A multiple extend ball screw and nut linear actuator incorporates a revolvable axially restrained ball screw with a ball nut thereon. A constant speed reversible drive revolves the screw to move the ball nut forwardly and rearwardly. External helical threads of the same hand as the ball nut threads are provided externally on the ball nut but have a substantially reduced lead. A second rotatably restrained nut having threads matching the external threads on the ball nut mounts on the ball nut and connects to the system to be actuated.