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US 7,410,608 B1Granted
Methods for manufacturing a diaphragm for an air admittance valve
AssigneeRectorseal Corporation
InventorHenry J. Gohlke
Life of this patent
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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.
Claims4
A process for manufacturing a diaphragm for an air admittance valve, comprising:
- a. disposing a first center disk of a diaphragm for the air admittance valve into a first cavity of a first mold, the first center disk having a hollow stem extending away from the center disk;
- b. fluidicly coupling the hollow stem of the first center disk with a molding runner in the first mold;
- c. flowing a material into the first mold through the molding runner and through the hollow stem and then laterally outwardly beyond a perimeter of the first center disk;
- and
- d. allowing the material to harden to form a lateral membrane coupled to the first center disk and extending laterally beyond a perimeter of the first center disk of a continuous membrane material.
2 more elements
Dependencies are inferred from the claim text.