Parker-Hannifin Corporation

Jeffrey Ballini

Jing-Chau Wu

Shaiw-wen Tai

A check valve is provided with first and second housing components that are telescoped together to define a valve housing having an inlet, an outlet and a valve chamber therebetween. The valving element is disposed in the valve chamber for movement between a first position where the valving element seals the inlet to the valve chamber and a second position where the valving element permits flow from the inlet, through the valve chamber and to the outlet. A disk spring has a central support secured to the valving element and an outer support secured between the first and second components of the housing. The disk spring is disposed to bias the valving element into a closed position. However, sufficient gas forces in the inlet will overcome the forces of the spring and open the valve. The spring is asymmetrical to prevent noise attributable to fluttering of the valving element and to achieve a more rapid opening response. The first and second housing components are welded to one another at a location spaced from the spring to prevent heat related damage to the spring.

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Wantage, NJ, United States of America

Jeffrey Ballini