Check valve

Description

FIG. 1 is a top, front perspective view of a check valve;

FIG. 2 is a top, rear perspective view thereof;

FIG. 3 is a side view thereof;

FIG. 4 is a front view thereof;

FIG. 5 is a rear view thereof; and,

FIG. 6 is a top view thereof.

The broken lines showing for unclaimed portions of the check valve in FIGS. 1–2 and 4–6 form no part of the claimed design.

Claims

The ornamental design for a check valve, as shown and described.