| 摘要 |
<p>PURPOSE: To obtain a check valve which has a sufficient durability to a reverse flow pressure, and a high reliability, as well as can reduce a flow resistance extensively. CONSTITUTION: A hole is formed at the center of a valve body 12 formed of an about circular ring form rubber material to which a metal bush 11 is formed integrally, and a shaft 13 is penetrated in the hole. A spring 2 is provided around the shaft 13, and the rear side surface of the valve body 12 is held on one end of the spring 2 through the metal bush 11. At the downstream side of the valve body 12, a conical stopper 4 which regulates the moving amount and the deforming amount of the valve body 12, and has a recess at the center, is provided, and the stopper 4 is held and fixed by the shaft 13 and one side end 13b of the shaft 13.</p> |
