Inverted cam-operated force-driven infusion pumping mechanism

A machine-implemented method, comprising:

• providing a pumping mechanism for an infusion pump, the pumping mechanism comprising a plurality of compression elements configured to, in a default state, each compress a fluid tubing loaded into the pumping mechanism against a rigid tubing support surface;
• operating a plurality of cams in the infusion pump to consecutively lift each respective compression element of the plurality of compression elements away from compressing the fluid tubing, against a force being applied by the respective compression element, wherein each of the plurality of compression elements are caused to compress the fluid tubing until lifted by a respective cam of the plurality of cams;
• and
• continuously rotating the plurality of cams to create a sinusoidal compression force against the fluid tubing to displace a fluid within the fluid tubing in a downstream direction of flow.

A peristaltic pump system for pumping a fluid through an infusion set, comprising:

• a plurality of compression elements configured to compress a fluid tubing filled with a fluid against a rigid tubing support surface when the fluid tubing is received by an infusion pump;
• a plurality of force generating components, each force generating component being configured to exert a compression force on a respective compression element of the plurality of compression elements to cause the plurality of compression elements to compress the fluid tubing against the rigid tubing support surface when the fluid tubing is received by the infusion pump;
• a plurality of cams operably connected to the plurality of compression elements, each cam configured to, when rotated, periodically apply a counterforce to a respective compression element to counteract the compression force being applied to the respective compression element and lift the respective compression element away from compressing the fluid tubing according to a cam profile of the cam,
• wherein, while the plurality of cams are rotated, the compression forces exerted on the plurality of compression elements, counteracted by each of the compression elements being lifted according to the cam profiles of the plurality of cams, create a sinusoidal compression force against the fluid tubing to displace the fluid within the fluid tubing in a downstream direction of flow.