US 11,806,502 B2
Micropump
Antoine Barraud, Lonay (CH); Simon Kuenzi, Lausanne (CH); and Remy Rysman, Lausanne (CH)
Assigned to Tandem Diabetes Care Switzerland Sarl, St-Sulpice (CH)
Appl. No. 15/777,284
Filed by Tandem Diabetes Care Switzerland Sàrl, St-Sulpice (CH)
PCT Filed Nov. 15, 2016, PCT No. PCT/IB2016/056870
§ 371(c)(1), (2) Date May 18, 2018,
PCT Pub. No. WO2017/085624, PCT Pub. Date May 26, 2017.
Claims priority of application No. 15195733 (EP), filed on Nov. 20, 2015.
Prior Publication US 2018/0339102 A1, Nov. 29, 2018
Int. Cl. A61M 5/142 (2006.01); F04B 43/00 (2006.01); F04B 43/09 (2006.01); F04B 43/04 (2006.01); F04B 19/00 (2006.01); F04B 43/14 (2006.01); A61M 5/168 (2006.01); F04B 49/22 (2006.01); F04B 53/10 (2006.01); B29C 69/02 (2006.01); B29K 27/12 (2006.01); B29L 31/00 (2006.01)
CPC A61M 5/14248 (2013.01) [A61M 5/14224 (2013.01); A61M 5/16813 (2013.01); F04B 19/006 (2013.01); F04B 43/0072 (2013.01); F04B 43/043 (2013.01); F04B 43/09 (2013.01); F04B 43/095 (2013.01); F04B 43/14 (2013.01); F04B 49/22 (2013.01); F04B 53/1072 (2013.01); A61M 2005/14268 (2013.01); A61M 2205/3317 (2013.01); A61M 2207/00 (2013.01); B29C 69/02 (2013.01); B29K 2027/12 (2013.01); B29L 2031/7496 (2013.01)] 27 Claims
OG exemplary drawing
 
1. 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.