Importance

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Abstract

A diaphragm actuated pressure regulator is provided having a molded contoured diaphragm capable of operation in the upper portion of the diaphragm's deflection stroke without experiencing material deformation and thereby preserving the precision of the diaphragm's response to pressure fluctuations. The pressure regulator includes a curved lever arm for transmitting the deflection of the diaphragm to a displacement of a valve pad which regulates the flow of gas from an inlet through an orifice restriction to an outlet. The lever fulcrum is located in the throat area of the pressure regulator and supported by a guide to provide a high lever ratio which enables a relatively small diaphragm to generate a relatively high valve closing force. In a preferred embodiment of the invention the diaphragm includes an O-ring shaped circumference which is secured between the upper assembly and the lower case of the pressure regulator thereby insuring an air tight seal without the need for an additional gasket or sealant material.

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First Claim