| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a valve with an O-ring having a system and a structural form, simplified, satisfying an intended use as a valve and a packing material, and easily operated to open the valve. <P>SOLUTION: The whole periphery or part of an inner side coming into contact with the O-ring 3, to which the O-ring 3 is stretched and fixed elliptical or polygonal, is shaped like a hollow cylinder lid 2. A through hole 4 narrower than the O-ring is provided in an O-ring fixing groove coming into contact with the O-ring 3, whereby in the case where the internal pressure of the hollow cylinder lid 2 exceeds the force of constraint of the O-ring 3, the O-ring 3 is expanded through the through hole 4 to open the valve, and when the internal pressure of the hollow cylinder 2 becomes equal to the force of constraint of the O-ring 3, the O-ring 3 is contracted to close the valve. The amplitude of the O-ring is served as a valve to keep the closed state, and an exposed part of the O-ring 3 close to the through hole 4 coming into contact with the O-ring 3 is expanded to open the valve. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
