| 摘要 |
<p>A tube coupling including a front and rear collet which are driven into biting engagement with a tube wall, the front collet being adapted to scrape the tube material to cold flow the same into abutments against which a flat portion of such collet sealingly bears, and the rear collet being adapted to cut chips or curls from the tube material to form the seal between such rear collet and the tube. An axially forwardly extending projection on the rear collet is provided with at least one cutting edge which penetrates the tube material in a true radial direction responsive to arcuate flexing of such projection caused by engagement along a portion of the front collet, such flexing and bite occurring with relatively reduced friction between the collets due to the configuration and flexure of the projection.</p> |
