| 摘要 |
PCT No. PCT/GB89/01245 Sec. 371 Date May 9, 1991 Sec. 102(e) Date May 9, 1991 PCT Filed Oct. 20, 1989 PCT Pub. No. WO90/04492 PCT Pub. Date May 3, 1990.Extraction apparatus 10 for tubes and like elongated articles comprises a tiltable gripping collar 64 of fixed internal dimension to engage and grip the article to be extracted. The collar has internal dimensions somewhat larger than those of the articles to be gripped, and is mounted so as to tilt when in use and to engage and grip the article as a result of this tilting action. The collar be used either as non-return means for the article being extracted, or may be used for applying the extraction level itself. A collar assembly is however preferably used to apply the extraction load separate and apart from the tilting collar. The collar jaws a axially spaced from the end of the tubular piston rod of the ram and connected to it by a collar head whereby the assembly is removable on a quick attach basis for servicing. |
