Automatic drain valve

Description

The patent or application file contains at least one drawing executed in color. Copies of this patent or patent application publication with color drawing(s) will be provided by the Office upon request and payment of the necessary fee.

1. Automatic drain valve

1.1 : Perspective

1.2 : Front

1.3 : Back

1.4 : Top

1.5 : Bottom

1.6 : Left

1.7 : Right

The portion colored by gold (yellow and orange) forms no part of the claimed design.

Claims

The ornamental design for an automatic drain valve, as shown and described.