Fluid handling – Systems – With flow control means for branched passages
Reexamination Certificate
2008-10-03
2009-12-29
Fox, John (Department: 3753)
Fluid handling
Systems
With flow control means for branched passages
C137S885000, C251S061100, C092S097000
Reexamination Certificate
active
07637284
ABSTRACT:
A sanitary diaphragm valve has a valve body formed of an upper plate and a lower plate, with a flexible resilient diaphragm and a spacer between them. The margin of the diaphragm rests on a peripheral step formed in the lower plate to create a positive space between the lower plate and the edges of the diaphragm. A piston within a cylinder in the upper plate can descend to compress the diaphragm against a valve port to close the valve. The pressure of the liquid product can raise the diaphragm and the piston when control pressure is relieved from the piston.
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Fox John
Molldrem, Jr. Bernhard P.
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