Self-Biasing Diaphragm Valve for Low Pressure Loss Sealing

The patent removes the spring and other biasing devices from the valve assembly, extracting the unnecessary components that complicate the design. The diaphragm is designed to function without these additional parts, achieving sealing reliability through its own structural properties and the pressure differential created by the inlet chamber.

The diaphragm is designed to self-bias to the closed position through its own structural characteristics and the natural pressure differential in the system. The inlet chamber pressure automatically provides the biasing force when the outlet chamber is vented, eliminating the need for external biasing devices.

The spring and biasing devices are removed from the system, eliminating the additional pressure drop that would be required to compress these components and maintain the closing force. The valve achieves sealing through the direct action of inlet pressure on the diaphragm without intermediate mechanical components.

The mechanical spring-based biasing system is replaced with a direct fluid pressure mechanism. The inlet chamber pressure directly acts on the diaphragm surface to provide the closing force, substituting a simple pressure-based system for the complex mechanical spring system.

The patent extracts the spring and associated mounting features from the valve body design. The valve body is simplified to its essential function of containing the fluid chambers and providing inlet/outlet connections, without additional features for accommodating biasing devices.

Instead of adding features to the valve body to accommodate springs, the design inverts the approach by allowing the diaphragm and inlet chamber pressure to provide the biasing function directly. The valve body remains simple while the diaphragm system provides the necessary operational capability.