| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a stop ring which is not deformed. <P>SOLUTION: This seal is for a pipe coupling including a plurality of segments surrounding a center space attached in a relation keeping contact of an end and an end. The seal can be positioned in the center space. The seal is a first ring formed out of flexible and elastic material. The first ring includes a first one side part and second one side part oppositely arranged and extending in a circumference direction, and a center part positioned between the one side parts and connecting the one side parts. Each one side part includes the first ring having an outer diameter larger than outer diameter of the center part, and a second ring positioned in the center part and including a circumference groove facing radial direction inward, an outside part positioned in the circumference groove, and an inside part projecting radial direction inward. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
