| 摘要 |
An expiration valve composed of a valve housing presenting an inlet arranged to be connected to the expiratory outlet of ventilating apparatus, and an outlet, a valve seat disposed within the housing, a valve disc arranged to cooperate in a sealing manner with the valve seat, a member biasing the valve disc into its sealing position against the valve seat in the direction counter to the air flow direction between the inlet and the outlet, and a damping chamber containing a viscous fluid and arranged to cause movement of the viscous fluid within the chamber to damp vibrations of the disc during movement of the disc within the housing. |
