Patent ID: 7543653

Claim:
A valve for controlling fluid flow, said valve comprising: a first chamber having an inlet and an outlet; a closure member movably mounted within said chamber, said closure member being movable between a closed position blocking said inlet, and an open position away from said inlet; a flexible diaphragm deformable in response to fluid pressure applied against said diaphragm; and a second chamber, wherein said diaphragm forms a fluid tight interface between said first and second chambers; wherein a latch is movably mounted within said first chamber, said latch having a first portion in direct contact with said diaphragm and a second portion engageable with said closure member, said latch being engaged with said closure member by said diaphragm deforming in response to said fluid pressure and thereby maintaining said closure member in said closed position, said latch moving out of engagement with said closure member upon deformation of said diaphragm in response to a release of said fluid pressure thereby allowing said closure member to move into said open position.