Ball screw

Description

FIG. 1 is a perspective view of a ball screw.

FIG. 2 is a front elevation view thereof.

FIG. 3 is a rear elevation view thereof.

FIG. 4 is a top plan view thereof.

FIG. 5 is a bottom plan view thereof.

FIG. 6 is a left side elevation view thereof; and,

FIG. 7 is a right side elevation view thereof.

The broken lines shown in the drawings illustrate portions of the ball screw that form no part of the claimed design.

Claims

The ornamental design for a ball screw, as shown and described.