초록 ▼

A self venting drain valve (10) for a fuel filter/water separator unit or other air tight fluid container is disclosed. The valve includes a arcuately elongated fluid hole (18) and a vent hole (20) in a lower wall (12) of the unit. A cylindrical movable member (36) is mounted for rotational movement

A self venting drain valve (10) for a fuel filter/water separator unit or other air tight fluid container is disclosed. The valve includes a arcuately elongated fluid hole (18) and a vent hole (20) in a lower wall (12) of the unit. A cylindrical movable member (36) is mounted for rotational movement on a pivot post (16) which extends downward from the unit. The movable member includes an upper planar face (40). A arcuately elongated slot (42) in the movable member is in fluid connection with a liquid outlet (46). The movable member also includes an air passage (48) in communication with an air intake (52). In a first rotational position the movable member blocks liquid flow out of the unit as well as air flow into the unit. In a second rotational position, the fluid hole on the unit is in communication with the liquid outlet opening of the movable member while the air flow into the unit remains blocked. In a third rotational position, the fluid hole in the wall is fully aligned with the elongated slot on the movable member while the air passage on the movable member is aligned with the vent hole in the unit. This enables air to enter the unit and the liquid to readily escape through the liquid outlet of the movable member.

대표청구항 ▼

A self venting drain valve for draining liquid contained in a generally air tight container, said container including a wall on a lower portion thereof, comprising: a fluid hole in said wall for passing liquid therethrough, said fluid hole communicating with the interior of said container through a

A self venting drain valve for draining liquid contained in a generally air tight container, said container including a wall on a lower portion thereof, comprising: a fluid hole in said wall for passing liquid therethrough, said fluid hole communicating with the interior of said container through a first opening; a vent hole in said wall for passing air therethrough, said vent hole disposed of said fluid hole and communicating with the interior of said container through a second opening, said first and second openings located generally at the same vertical elevation in said container; a movable member mounted for movement in a first direction on said container, said member including; a planar face adjacent said wall, said planar face in blocking relation of said fluid hole and vent hole when said member is in a first position; said member further including fluid accepting means in said face for accepting liquid delivered at said fluid hole, said fluid accepting means in fluid communication with said fluid hole when said member is in a second position and a third position; a liquid outlet in fluid communication with said fluid accepting means; and an air passage through said member, said air passage terminating at an air inlet opening in said face, said air inlet opening in communication with said vent hole when said member is in the third position; whereby when said member is in the first position said drain valve is closed, upon movement of said member in the first direction to the second position, said container is placed in a negative pressure condition and upon further movement of said member in said first direction to a third position, air is enabled to enter said container through said air passage enabling liquid to drain through said liquid outlet.