| 摘要 |
A valve assembly (10) for anaesthetic apparatus has a first and second valve bodies (11, 12) fitted with respective first and second valve members (19, 30). Each valve member (19, 30) is a plug valve, rotatably mounted on its respective valve body (11, 12) having a diametrical bore (22, 31) and radial passage (23, 32) which operatively connects the inlet (16, 24) of the valve bodies (11, 12) to one or both of the outlets (17, 18; 25, 27) of the bodies. A lost motion mechanism (33) interconnects the valve members (19, 30) so that when the first valve member (19) is rotated by the lever (20) through 180<o>, the second valve member (30) will be rotated through 90<o> after the initial 90<o> rotation of the first valve member (19) in either direction. The valve assembly (10) is fitted to the anaesthetic apparatus for operation in either the controlled (Mapleson D/E) ventilation or spontaneous (Mapleson A) ventilation. |
