| 摘要 |
<p>Notched edge clamps cooperate with lateral extensions on the compressor members for ensuring sealing while the clamps have smoothly rounded diverging mouths for preventing crack inducing flexure of the tube in a constrictable tube valve. A limber wishbone shaped yoke maintains sealing pressure. Wings on the compressor members with transition curves guide the tube during flexure. Connections with lost motion between bosses on the tube and respective wings provide positive opening. Resilient extensions are provided on a modification of the compressor members. The tube and bosses are formed by extruding a tube with longitudinal ribs and then machining away the undesired sections of the ribs.</p> |
