Fluid handling – Diverse fluid containing pressure systems – Fluid separating traps or vents
Patent
1991-12-12
1995-02-07
Walton, George L.
Fluid handling
Diverse fluid containing pressure systems
Fluid separating traps or vents
137430, 137444, F16K 3134, F16K 3300
Patent
active
053868447
ABSTRACT:
A combination air and vacuum valve comprises a valve body (20) including a fluid inlet (25) and gas outlet (26), a valve poppet (8) guided to open and close said outlet (26), a float (19) and rod (18) connected operatively thereto in a vertical orientation for allowing said valve poppet (8) to close and open said gas outlet (26), a seat frame (5) for guiding stem of said poppet (8), a fulcrum pivot lever mechanism to which said float rod (18) is attached and which also contains a valve poppet seat (9) for pushing said valve poppet (8) via its stem to close said outlet (26), a fulcrum pivot axis of said fulcrum pivot lever mechanism containing a torsion spring (11); said spring (11) providing an additional upward force which assists the buoyancy effect of the float (19) in closing the valve. As a result, a smaller float may be used to achieve the same buoyant effect which would normally require a larger float. This allows the dimensions of the valve body to decrease, consequently reducing the weight and overall cost of the valve.
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Barnard Ralph R.
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Walton George L.
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