Abstract: An improved parallel-acting roller clamp is disclosed, for regulating fluid flow through a deformable plastic tube with improved control of fluid flow rate. The roller clamp achieves this improved performance by configuring a tapered relief groove formed in the clamp's bottom wall to have a reduced taper angle in the clamp's low-flow region. This minimizes variations in flow rate over time, due to cold flow, or creep, of the pinched, deformable plastic tube.

Abstract: An improved parallel-acting roller clamp is disclosed, for regulating fluid flow through a deformable plastic tube with improved control of fluid flow rate. The roller clamp achieves this improved performance by configuring a tapered relief groove formed in the clamp's bottom wall to have a reduced taper angle in the clamp's low-flow region. This minimizes variations in flow rate over time, due to cold flow, or creep, of the pinched, deformable plastic tube.

Abstract: An improved injection molded plastic roller pinch clamp for IV sets includes a housing having side walls, a bottom wall, a top wall, a flow control region, a roller wheel and plastic tubing which is pinched between the roller wheel and the bottom wall. Methods for making the same and mold modifications to make the same are disclosed. A number of preferred dimensional relationships exist for achieving the easing of the effort required to adjust the wheel and consequent flow rate and obtaining a firm grip on the tube, while reducing the clamp weight. The ratio of the cross-sectional thickness of the top wall to the side wall is in the range of 1.3 to 4.0; the housing having a weight to length ratio in the range of 0.2 to 0.48 grams per centimeter (normalized range of 0.17 to 0.39), the side wall being between 1.1 and 2.3 times the thickness of the walls of the tubing.