Back flow valve

Description

FIG. 1 is a perspective view of a back flow valve showing my new design;

FIG. 2 is a left elevation view thereof;

FIG. 3 is a right elevation view thereof;

FIG. 4 is a back elevation view thereof;

FIG. 5 is a front elevation view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof;

FIG. 8 is a cut-away view thereof, cut along 8-8 shown in FIG. 1; and,

FIG. 9 is a cut-away view thereof, cut along 9-9 shown in FIG. 4.

The broken lines shown are included for the purpose of illustrating the unclaimed portions of the article and form no part of the claim.

Claims

The ornamental design for a back flow valve as shown and described.