Abstract: A cartridge assembly for use in conjunction with a linear motion guided screw assembly includes (a) a cylindrical housing having an axial bore, at least a portion of the bore being defined by a threaded surface configured to engage a screw shaft; (b) at least one bearing disposed in the axial bore of the housing; (c) at least one retainer ring disposed in the axial bore of the housing; and, (d) a cylindrical lubricant block disposed in the axial bore of the housing, the lubricant block being fabricated from a microporous polymer which is impregnated with a lubricant oil.

Abstract: A cartridge assembly for use in conjunction with a linear motion guided screw assembly includes (a) a cylindrical housing having an axial bore, at least a portion of said bore being defined by a threaded surface configured to engage a screw shaft; (b) at least one bearing disposed in the axial bore of the housing; (c) at least one retainer ring disposed in the axial bore of the housing; and, (d) a cylindrical lubricant block disposed in the axial bore of the housing, said lubricant block being fabricated from a microporous polymer which is impregnated with a lubricant oil.

Abstract: A linear motion screw assembly is provided herein which comprises (a) at least a first end support, (b) a screw shaft rotatably mounted to the first end support and defining a longitudinal direction, (c) a linear guide means mounted to the first end support and oriented parallel to the screw shaft, (d) a follower assembly mounted to the screw shaft and, associated therewith, an anti-rotation means in translatable contact with the guide means and movable in a longitudinal direction along the guide means, and (e) a cartridge non-rotatably mounted within said follower assembly, said cartridge including a guide nut having an axial bore through which the screw shaft is rotatably disposed.

Abstract: An assembly that automatically compensates for backlash. The assembly includes two nut portions engaged to prevent relative rotation but permit relative movement in an axial direction. A sleeve is disposed between the nut portions with the opposite ends of the sleeve abutting annular rims formed on the nut portions. One end of the sleeve has at least one helical ramp extending around the its periphery that abuts a complementarily shaped ramp formed on the annular rim of one of the nut portions, while the other end of the sleeve has a flat outer surface abutting the flat annular rim of the other nut portion. A torsion spring has tangs secured to the sleeve and one of the nut portions and biases the sleeve rotatively with respect to the nut portions.