| 摘要 |
<p>a pumping tube 52 an end of the tube being provided with an end fitting 70 having a through passage 74, an abutment shoulder 78 and a threaded shank 82 extending from the abutment shoulder into the tube 52. The tube end abuts the shoulder and is accommodated in an opening 62, in the pumphead housing. The shoulder also abuts the housing at the opening and is secured against the housing by a retaining element 90. Preferably the threaded shank is tapered so that it decreases in diameter in the direction away from the abutment shoulder. The end fitting may be formed of first and second separable parts secured together by the retaining element, the first part includes the shoulder and shank, the second comprising a spigot for attachment to a tube.</p> |
