Patent ID: 6467362
Filing Date: 2002-10-22
Classification: B23Q,F16H,Y10T

Abstract:
An anti-backlash nut assembly on a reinforced lead screw comprising:a threaded lead screw rotatable about a central axis; a hollow, elongate reinforcing rail extending lengthwise of and surrounding the lead screw; a slot in the reinforcing rail extending lengthwise of the central axis; an anti-backlash nut assembly having a nut moveable along the reinforcing rail; the anti-backlash nut comprising two separate nut portions; each nut portion having a tongue extending radially through the slot and having threads engageable with the threads of the lead screw for moving both nut portions in reciprocating motion lengthwise of the rail when the screw is rotated; wedge means for forcing the nut portions apart to urge the flanks of their threads into forcible engagement with the threads of the lead screw to prevent backlash while the anti-backlash nut translates laterally along the reinforcing rail.