Patent ID: 7410608
Filing Date: 2008-08-12
Classification: B29C,B29L,F16K,Y10T

Abstract:
1. 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.