Micropump

A micropump including a support structure, a pump tube, and an actuation system comprising one or more pump chamber actuators comprising a camshaft and first and second cantilever arms, the pump tube comprising a pump chamber portion defining therein a pump chamber, an inlet portion for inflow of liquid into the pump chamber, and an outlet portion for outflow of liquid from the pump chamber, an adhesive surface configured to adhere to skin of a patient, the outlet portion coupled to a needle for subcutaneous administration of liquid to the patient having the micropump adhered thereto via the adhesive surface, the inlet portion, the outlet portion, and the pump chamber portion monolithically forming part of a continuous section of tube made of a supple material, the pump chamber portion bonded to a wall within the support structure via welding, brazing, adhesive bonding, or cold or hot heading, the first cantilever arm configured to cause, responsive to a spring force provided by the first cantilever arm and rotation of the camshaft, the pump chamber portion to expel liquid contained in the pump chamber via the outlet portion to the needle for subcutaneous administration to the patient, the second cantilever arm configured to allow liquid to enter the pump chamber via the inlet portion responsive to rotation of the camshaft, wherein the pump chamber portion has a cross-sectional area Ap in an expanded state that is larger than a cross-sectional area Ai of the pump tube at the inlet portion and the outlet portion, wherein an end of the inlet portion forms an inlet of the micropump and an end of the outlet portion forms an outlet of the micropump.