Corrosion resistant valve

Claim 1

A CORROSION RESISTANT VALUE COMPRISING: (A) A CORROSION RESISTANT HOUSING WITH A FLOW-PASSAGE THERETHROUGH, (B) A BONNENT ATTACHED AT THE HOUSING, (C) A VALVE SEAT IN THE FLOW-PASSAGE, (D) A CORROSION RESISTANT VALVE STEM IN THE HOUSING, (E) A PIN ATTACHED TO THE VALVE STEM EXTENDING LATERALLY THEREFROM, AND DISPOSED IN SLIDING CONTACT WITH AN AXIAL GROOVE IN THE BONNET FOR PERMITTING AXIAL MOVEMENT OF THE VALVE STEM WITHOUT TORSIONAL MOVEMENT, (F) MEANS IN THE BONNET ENGAGED WITH THE ONE END OF THE VALVE STEM TO MOVE IT AXIALLY TO END FROM THE VALVE SEAT, (G) A FLEXIBLE, CORROSION RESISTANT, CONCAVE DIAPHRAGM (H) A RELATIVELY THICK INNER PORTION OF THE DIAPHRAGM ATTACHED TO THE VALVE STEM, (I) A RELATIVELY THIN OUTER PORTION OF THE DIAPHRAGM SEIZED BETWEEN THE HOUSING AND THE BONNET, (J) AN INTERMEDIATE PORTION OF THE DIAPHRAGM EXTENDING IN AN UPWARD AND OUTWARD DIRECTION, TAPERED FROM THE INNER THICK PORTION TO THE OUTER THIN PORTION, (K) A CORROSION REISTANT CAP ATTACHED TO THE OTHER END OF THE VALVE STEM, (L) A GENERALLY FLAT FACE ON THE CAP ENGAGEABLE WITH THE VALVE SEAT, (M) A RIGID CORE IN THE VALVE STEM, AND THE VALVE STEM DEFINING A PROTECTIVE SHEATH FOR THE CORE, (N) A RADIAL ENLARGEMENT ON THE BOTTOM OF THE RIGID CORE INSIDE THE VALVE STEM, AND OPPOSITE THE FLAT FACE, (O) A CAVITY BETWEEN THE OTHER END OF THE VALVE STEM AND THE INSIDE OF THE CAP AND POSITIONED GENERALLY OPPOSITE THE AREA OF ENGAGEMENT OF THE FACE OF THE CAP WITH THE SEAT, (P) A RESILIENT FILLER IN THE CAVITY.