Apparatus to control fluid flow through a tube

FIG. 1 is a front, top, and right side perspective view of the apparatus to control fluid flow through a tube, showing my new design;

FIG. 2 is a back, top, and left side perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a back elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a right side elevational view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof.

The ornamental design which is claimed is shown in solid lines in the drawings. The broken lines shown in the figures represent portions of the apparatus to control fluid flow through a tube that form no part of the claimed design.