| 摘要 |
A valve housing (1000) comprises an upper surface (1500), a lower surface (1600), an opening (1630) for venting between the lower surface and the upper surface, a trench (1640) in the lower surface, a vacuum port (1110) in fluid communication with the trench, and ribs (1610, 1614) extending away from the lower surface. Alternatively, a valve housing comprises a top panel (1700), a bottom panel (1800), a first solid rail (1742) and a second solid rail (1752) extending between the top panel and the bottom panel. A nozzle (1728) is connected to the first solid rail, a vapor housing (1723) is in fluid communication with the nozzle and connected to the first solid rail. Ribs (1900, 1910) extend between the top panel and the bottom panel, the ribs being spaced between the first solid rail and the second solid rail. Methods secure membranes (1620, 1950) to the valve housings. |
