초록 ▼

A float-operated air release valve for a liquid transport system includes an internal float which has a downwardly concave impact surface arranged to be struck by any liquid entering the valve chamber thereby reducing the response time of the valve and rapidly closing the valve outlet before liquid

A float-operated air release valve for a liquid transport system includes an internal float which has a downwardly concave impact surface arranged to be struck by any liquid entering the valve chamber thereby reducing the response time of the valve and rapidly closing the valve outlet before liquid can be discharged from the outlet. The impact force on the float can be enhanced by providing a depending flange around a substantial portion of the periphery of the concave surface.

대표청구항 ▼

In a fast-operating air release valve operable to be normally open to release air from a liquid transport system and to close automatically to prevent spillage of liquid when pressure surges in the liquid in the system or other system malfunction tend to force liquid to flow through said valve, said

In a fast-operating air release valve operable to be normally open to release air from a liquid transport system and to close automatically to prevent spillage of liquid when pressure surges in the liquid in the system or other system malfunction tend to force liquid to flow through said valve, said valve being of the kind including a housing having a bottom wall provided with an inlet opening adapted to be connected to said system, said housing also having a discharge opening above the level of said inlet opening, a float buoyant with respect to liquid of the system arranged in the casing such that liquid entering the casing through said inlet and rising in the casing surrounds said float and causes the same to rise; and movable closure means operatively associated with said float and with said discharge opening such that rising of said float moves said closure means into closing relationship with said discharge opening, the improved float construction wherein said float has a bottom wall located above said inlet opening, said bottom wall when viewed in vertical section having a continuously curved downwardly facing concave impact surface of such concavity and area that liquid entering through said inlet opening and striking said concave impact surface causes said float to move upwardly to close said discharge opening in a shorter time period than occurs by float buoyancy alone.