Patent ID: 7234675
Filing Date: 2007-06-26
Classification: B23Q,F16C

Abstract:
1. A vertical guide unit comprising; a guideway member made on a wedge that has an upper surface and a lower surface, the upper surface slanting down toward the lower surface; wherein the guideway member has two pairs of raceway grooves on opposite sides of the guideway member; a first pair of the raceway grooves, wherein the length of the first pair of raceway grooves extend along the upper surface and slant downward toward the lower surface and a second pair of raceway grooves extending along the lower surface; a first slider movable along the upper surface and a second slider movable along the lower surface; wherein the first slider moves up and down relative to the second slider when moving in a sliding manner on the guideway member; wherein at least the first slider comprises a carriage having end caps respectively attached to forward and aft ends of the carriage; wherein the carriage has a recess engaged over the upper surface of the guideway member; wherein opposing sides of the recess have a third pair of raceway grooves respectively corresponding to the first pair of raceway grooves to form a pair of raceway passages ( wherein at least one rolling element runs through each of the raceway passages and a turnaround passage