| 摘要 |
PURPOSE:To eliminate a sealing spot which cuts off an external part in a moving part, by getting a driven megnetic body installed in a valve stem of a valve body inside a lead pipe magnetically coupled with a driving magnetic body. CONSTITUTION:A driven magnetic body 38 consisting of a magnetic material is being attached to a valve stem 36, and at the outside of a lead pipe 34, there is provided with a driving magnetic body 39 consisting of a magnetic material being magnetically coupled with the driven magnetic body 38 so as to make it shiftable in parallel with an axial of the lead pipe. When the driving magnetic body 39 located at the outside of the lead pipe 34 is forcibly moved up and down, the driven magnetic body 38 of the valve stem 36 being magnetically coupled with the driving magnetic body follows up the driving magnetic body 39 and moves up and down as well, thus a valve body 35 adjusts the opening of a valve hole 33. |
