Patent ID: 7040613

Claim:
A device having adjustable position shafts comprising: a first bearing assembly and a second bearing assembly spaced apart from the first bearing assembly, each bearing assembly having, a sliding block bearing shaft, a sliding block bearing for sliding up and down in the sliding block bearing shaft, a threaded shaft portion extending into each sliding block bearing, a ball screw inserted into the threaded shaft portion and engaging the bearing assembly for moving the sliding block bearing in the bearing housing shaft when the ball screw is rotated, a worm gear attached to the ball screw, a shaft having a thread thereon for engaging and turning the worm gear and rotating the ball screw to move the sliding block bearing in the sliding block bearing shaft of the bearing assembly when the shaft is rotated, a means for connecting the shafts in the first bearing assembly and the second bearing assembly such that both ball screws are turned simultaneously to raise and lower the sliding block bearings to the same position in the bearing assemblies at the same time.