B - Operations – Transporting – 21 – D
Patent
B - Operations, Transporting
21
D
B21D 53/10 (2006.01) B21H 1/14 (2006.01) F16H 25/22 (2006.01)
Patent
CA 2140985
A method of making ball screw and nut assemblies, and the products which result, wherein the nut is provided with a deformable wall portion of decreased compressive strength interjacent the ends of the nut. A compressive force is applied to the nut to axially deform the portion of decreased compressive strength while not changing the lead of adjacent lands and grooves in the non-compressed portion of the nut. The axial position of the lands and grooves in the non-compressed portion is thereby axially displaced such as to preload a recirculating train of balls traveling along the non-compressed portion of the nut relative to the lands and grooves of the screw, when the screw, nut, and balls are assembled.
Benton Robert L.
Welling William E.
Deeth Williams Wall Llp
Thomson Saginaw Ball Screw Company Inc.
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