| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To properly engage to seal both valve seat members in the radial direction outward and inward while an annular joint member is provided inside the joint member. <P>SOLUTION: The joint member has an outside annular seal member 56 to seal the space fastened between the outside peripheral surface 54 of the valve member and the outside valve seat part 38 when a valve member 44 stays at a closed position, and an internal side annular member 60 fixed by the valve member 44 at the position of the radial direction outside of the inside valve seat part 42. The valve opening 40 of the internal side valve seat part is demarcated in the radial direction inside of the annular surface, and when the outside annular seal member 56 is fastened between the outer peripheral surface of the valve member and an outer side valve seat part, while being elastically deformed and pressed by the inside valve seat part 42 so as to be engaged and curved by the inside valve seat part 42, the internal side annular member 60 which is seals between the inside valve seat 42 and the inside peripheral surface of the valve member 44 is obtained. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
