Methods for manufacturing a diaphragm for an air admittance valve
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United States of America Patent
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Aug 12, 2008
Grant Date -
N/A
app pub date -
Sep 19, 2007
filing date -
Sep 19, 2007
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In some embodiments, a process for manufacturing a diaphragm for an air admittance valve includes disposing a first center disk into a first cavity of a first mold, the first center disk includes a hollow stem. A material is provided into the first mold, through the hollow stem and laterally outwardly beyond a perimeter of the first center disk. The material is allowed to harden to form a lateral membrane coupled to the first center disk and extending laterally beyond a perimeter of the first center disk.
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