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A self-venting valve having its principal parts molded of nylon reinforced with glass fibers is mounted in the bottom of a fuel filter assembly to drain water and other contaminants from the assembly. The self-venting valve includes a plunger portion with a bore therethrough for draining water from

A self-venting valve having its principal parts molded of nylon reinforced with glass fibers is mounted in the bottom of a fuel filter assembly to drain water and other contaminants from the assembly. The self-venting valve includes a plunger portion with a bore therethrough for draining water from the fuel filter assembly and a valve body member which receives the plunger. The valve body member has a vent hole therein which communicates with the interior of the housing to let air into the housing so that as the water drains from the housing a partial vacuum is not created which might interrupt the flow of water. The plunger is biased to the valve closed position by a coil spring, however the valve may be held in the open position by misaligning lugs on the plunger with slots in the valve body member.

대표청구항 ▼

In a self-venting valve useful for draining contaminants including water from a fuel filter housing, wherein the valve includes a plunger member having first and second ends, and a valve body member having a first end for positioning within the housing and a second end for positioning outside of the

In a self-venting valve useful for draining contaminants including water from a fuel filter housing, wherein the valve includes a plunger member having first and second ends, and a valve body member having a first end for positioning within the housing and a second end for positioning outside of the housing, the improvement comprising: a plunger member receiving bore extending through valve body, the plunger member being mounted in the plunger member receiving bore and defining a recess with said plunger member receiving bore at the first end of the valve body; a sealing surface on the first end of the plunger member, the sealing surface being positioned for sealing engagement with the first end of the valve body member to close said recess when the plunger member is in a first position and for unsealing with the first end of the valve body when the plunger member is in a second position; an axially extending bore in the plunger member for drawing water therethrough from the housing, the axially extending bore having a first end opening through the second end of the plunger outside of the valve body and a second opening to said recess within the valve body; a spring engaging the second end of plunger member for urging the plunger member to the first position; a retainer arrangement for selectively holding the plunger member in the second position upon rotating the plunger member; and a vent passage separate from said plunger member receiving bore disposed in the valve body, the vent passage having a first end opening through the first end of the valve body for opening within the housing to let air into the housing and a second end opening through the second end of the valve body for opening to the atmosphere, the first end of the vent being closed by the sealing surface of the plunger member when the plunger member is in the first position.