| 摘要 |
A device for regulating the rate of flow in a flexible tube, particularly for infusion and transfusion apparatus, comprises a tube receiver which has a longitudinally extending clamping surface overwhich the tube to be clamped is positioned. A clamp member for example, a roller is guided for movement over the clamping surface on a guide track to bring the clamping member into close proximity to the clamping surface and to move it along the surface. The construction includes a groove defined in either the clamping surface itself or the clamping member which tapers inwardly in the direction of clamping movement and which accommodates the flexible tube during the clamping operation. A small loop or overhang portion of the tube forms in the groove as the clamping action is increased by movement of the clamping member over the tube along the clamping surface so that progressive movement of the clamping member reduces the size of the loop of the hose until it is eventually flattened completely and completely closed off. |
