| 摘要 |
PROBLEM TO BE SOLVED: To provide ease of manufacture, reliable and repeatable deformation of a diaphragm, smooth airflow through a valve unit during inhalation, and an uninterrupted seal preventing airflow through the valve unit at all times except during inhalation.SOLUTION: A tracheostomy valve includes a flexible diaphragm abutting a rib shaped substantially as a flat plate. Opposite the rib, the diaphragm abuts on a boss and forms the uninterrupted seal therewith. |
