Electro-magnetic diaphragm valve

Claim 1

IN A VALVE FOR CONTROLLING THE FLOW OF FLUID, THE COMBINATION OF: A HOUSING; A WALL WITHIN THE HOUSING DIVIDING IT INTO INLET CHAMBER AND ON OUTLET CHAMBER; AN INLET OPENING INTO THE INLET CHAMBER; AN OUTLET OPENING FROM THE OUTLET CHAMBER; AN APERTURE IN SAID WALL FOR PROVIDING COMMUNICATION BETWEEN THE INLET CHAMBER AND THE OUTLET CHAMBER WITH THE SURFACE AROUND SAID APERTURE PROVIDING A VALVE SEAT; A DIAPHRAGM WITHIN THE INLET CHAMBER ADJACENT TO THE VALVE SEAT PARTIITIONING THE INLET CHAMBER AND PROVIDING A BUFFER CHAMBER ON THE SIDE OF THE DIAPHRAGM REMOVED FROM THE VALVE SEAT; A VALVE MEMBER AND AN ARMATURE CARRIED BY SAID DIAPHRAGM, THE DIAPHRAGM BEING MOVABLE BETWEEN AN OPEN POSITION IN WHICH THE VALVE MEMBER IS SPACED FROM THE VALVE SEAT AND A CLOSED POSITION IN WHICH THE VALVE MEMBER IS IN SEALING ENGAGEMENT WITH THE VALVE SEAT; RESTRICTED PASSAGE MEANS INTERCONNECTING THE BUFFER CHAMBER AND THE INLET CHAMBER WHICH IS IN COMMUNICATION WITH THE INLET OPENING; YIELDABLE MEANS URGING THE DIAPHRAGM TOWARD THE CLOSED POSITION; AND ELECTRO-MAGNETIC MOTOR MEANS INCLUDING A CORE MEMBER IN THE BUFFER CHAMBER FOR CO-OPERATING WITH THE ARMATURE TO MOVE THE DIAPHRAGM TOWARD THE CORE MEMBER FROM THE CLOSED TO THE OPEN POSITION WHEREBY THE VALVE MEMBER IS MOVED AWAY FROM THE VALVE SEAT AND FLUID WHICH IS IN THE BUFFER CHAMBER IS CAUSED TO FLOW THEREFROM THROUGH THE RESRICTED PASSAGE MEANS TO THE INLET CHAMBER, SAID PASSAGE MEANS CONTROLLING THE RATE OF FLOW OF FLUID FROM THE BUFFER CHAMBER TO LIMIT THE RATE OF MOVEMENT OF THE DIAPHRAGM FROM THE CLOSED POSITION TOWARD THE CORE MEMBER.