| 摘要 |
<p>PURPOSE:To prevent changes of exhaust air speed through an exhaust valve by pressure of an automatic sphygmomanometer in such a way that a clearance member wich forms an exhaust air path is provided on a pair of resilient plates which are stuck to each other by applied air pressure, and a stopper for preventing movement of the clearance member is provided in the exhaust air path. CONSTITUTION:When air pressure at the upper part of a valve support 20 is high, the rate of compressive deformation of resilient plates 2, 3 becomes large clearance by a clearance member 4 becomes small, and when the pressure is low, the rate of compressive deformation becomes small, and exhaust air speed becomes practically constant regardless of the level of the pressure. Since the inside of a ring-shaped stopper 5 is brought into contact with an exhaust pipe 16 and the outside of the stopper 5 is brought into contact with the insides of resilient plates 2, 3 resulting in stopping the lengthwise movement of the clearance material, changes of exhaust air speed of the exhaust valve due to pressure of the automatic sphygmomanometer can be prevented.</p> |
