Importance

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Abstract

This invention relates to a valve mechanism of a variety of uses. In one use the valve positively seals a line through which fluid flows against reverse or backflow of the fluids in any position in which the valve is disposed. In another use the valve mechanism functions as a vacuum breaker. In still another use it functions as a foot valve. The same valve structure is utilized in all of the aforesaid functions. Generally, the valve structure has a housing comprising an inlet member and an outlet member which are joined together. A flexible diaphragm is secured between the inlet and outlet members. One end of the inlet member is provided with a shoulder or flange adjacent the flexible diaphragm. One end of the outlet member is provided with a valve support seat adjacent the flexible diaphragm. The flexible diaphragm has apertures or orifices interiorly of its perimeter and a solid central portion. Under pressures exerted from the inlet side or the outlet side the diaphragm flexes from a position wherein its central portion abuts the valve support seat and the orifices are exposed for the flow of liquids to the outlet side to a position wherein the orifices are in proximity to the shoulder or flange and the central portion of the diaphragm seals the passage from the inlet member.

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First Claim