Check valve

Description

FIG. 1 is a rear perspective view of the check valve;

FIG. 2 is a front perspective view thereof;

FIG. 3 is a top plan view thereof, the bottom plan view being identical thereto;

FIG. 4 is a right side elevational view thereof, the left side elevational view being identical thereto;

FIG. 5 is a rear elevational view thereof; and,

FIG. 6 is a front elevational view thereof.

The broken lines illustrate portions of the check valve which form no part of the claimed design.

Claims

I claim the ornamental design for a check valve, as shown and described.