| 摘要 |
PURPOSE:To prevent the vibration of a ball during fluid is passing therethrough by a method wherein the end face of a spring, which is abutting against the ball, is slanted with respect to the center line of the spring in the non-return valve provided with the ball, energized by the spring, in the hole of a path communicated with an opening so as to be pushed against the opening. CONSTITUTION:A plate 4 is provided at the surface of the fore end of the hole 1 of a path and a ball 2 is energized by a spring 13 so as to be pushed against the opening hole 4a of the plate 4. Another hole 5 of path is communicated with the hole 1 of the path. Both end faces of the spring 13 are slanted by an angle theta with respect to the central axis of the spring, therefore, the ball 2 and the spring 13 are contacting with each other under being slanted by the angle theta. When a hydraulic pressure, acting on the ball 2 through the opening 4a, pushes and opens the ball 2 against the energizing force of the spring 13, the ball is pushed against the inner wall of the hole 1 of the path by a biased force in accordance with the angle of inclination theta and the opening 4a is opened, therefore, the vibration of the ball will never be caused in case the fluid is passing therethrough. |
