Ball screw device and linear motion device

Details Ball screw device and linear motion device Ball screw device and linear motion device

2007-01-09

2007-01-09

Lewis, Tisha (Department: 3681)

Machine element or mechanism

Mechanical movements

Reciprocating or oscillating to or from alternating rotary

C074S089320, C384S521000

Reexamination Certificate

active

10945110

ABSTRACT:
In a ball screw device comprising a screw shaft and a nut which make relative movement to each other through a multiplicity of balls, as well as in a linear motion device comprising an outer member and an inner member which make the relative movements to each other through the multiplicity of balls, a spacer having two concave surfaces facing respectively to balls, is disposed between the balls adjacent to each other. In one preferred form, the spacer has such a configuration that the balls adjacent to each other come into contact with at least three or more outer edge portions of the spacer or portions vicinal to the outer edges.

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