| 摘要 |
A valve using a flexible membrane integrated into the throat or passageway. The membrane forms a portion of the passageway's sidewall. The membrane is designed to collapse against another portion of the sidewall to restrict flow of product through the passageway, when it is in one position (i.e., its open position) the flexible membrane forms an inconspicuous part of the sidewall (as far as product moving through the passageway) and product can pass through the passageway freely, when it is in a second position (i.e., its closed position), the flexible membrane is collapsed against a rigid or non-movable portion of the sidewall thereby preventing flow of the product through the passageway. |
